Some of the Web-Based Methods Available to Do

controldesign.com
a little change
ARC FLASH:
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Some of the Web-Based Methods Available to
MARCH 2012
Do Automation Product Research Hold Little
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CONTENTS
MARCH 2012
FEATURES
22 Cover Story
A Little Change
Some of the Web-Based Methods Available to Do Automation
Product Research Still Hold Little Currency for Many Machine
Builders
Joe Feeley, editor in chief
Volume 16, No. 3
33 Input/Output Systems
Arc Flash: Not My Fault
End Users Are Responsible for Keeping Workers Safe From
Electrical Hazards, but More of the Onus is Now on Machine
22
Builders
Aaron Hand, managing editor
39 Product Roundup
A Sense of the Market
Machine Builders Remain Consistent With Sensor Choices
COLUMNS
33
7 ControlDesign.com
21 Embedded Intelligence
Hazardous Zone Safety
Flashback to 1999: I’d Like
to Teach the World...
9 Editor’s Page
‘Oops’ Just Isn’t Enough
38 TechFlash
Is PLC a Dirty Word Now?
11 Live Wire
Manufacturing in the U.S.
50 OEM Insight
Why Not Lubricate Less?
HOT BUTTONS
44
CONTROL DESIGN, (ISSN: 1094-3366) is published 12 times a year by
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13 OEM Spotlight
44 Real Answers
Plasma Tools Carve Out
Place in High Tech
How to Push
Motor Efficiency
14 InDiscrete
STEM Students Scared by
‘Hard’ Factor
47 Product Showcase
CONTROL DESIGN EXCLUSIVE
46 Eaton’s OI Consolidates PLC, I/O, Wiring
March 2012 Control Design
5
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NEW WHITE PAPERS
EXPLOSION PROTECTION AND
INTRINSIC SAFETY 101
Everything you need to
know about intrinsic safety
technology, hazardous
locations, surge protection,
HART interface solutions and
signal conditioning.
Targets Intrinsic Safety.” He
sell equipment to custom-
asks what might happen if live
ers that operate in hazardous
working never created an arc in
areas, there are important
the first place. Read this article
electrical and electronic signal
at www.ControlDesign.com/
factors for both parties to
DART to learn how IS require-
consider. Designing systems for
ments have changed over the
installation in hazardous areas
years. See Rezabek’s report on
requires an understanding of
how energy-limiting require-
division and zone classifica-
ments of IS previously led to
tions, and whether off-the-shelf
serious limitations for process
components are appropriate.
buses such as Profibus-PA and
In the article “Operator
Foundation fieldbus, and how
Interface in Hazardous Areas,”
FISCO and FNICO practices al-
Senior Technical Editor Dan
low high enough power budgets
Hebert covers some of the re-
to increase the number of
quirements for building indus-
devices permitted and simplify
trial equipment for hazardous
IS calculations.
areas. Hebert’s article explains
Safety in hazardous areas
can be costly. However, intrinsic
hazardous areas differently—
safety makes protecting field
by zones, classes, divisions. He
devices easier and cheaper. How
also makes suggestions how
so? To get the answer to this
machine and robot builder
question, read the article “Less
OEMs can provide safety in
Bang for the Buck,” written by
SPECIAL TO THE WEB
these risky environments. Read
Walt Boyes, editor in chief for
this column at www.ControlDe-
sister publication Control.
HAZARDOUS LOCATION GUIDE
Download this e-book to better
understand hazardous locations
and protection methods. Learn
about intrinsic safety from
industry leaders.
www.ControlDesign.com/
hazguide
sign.com/danger to learn how
DID YOU KNOW YOU CAN
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safely around high-power en-
it isn’t, summarizes hazard-
ergy sources, industry workers
ous area classifications, and
must make sure that power sup-
touches on IS for analog, HART
plies are specifically designed
and fieldbus devices. Read this
and certified for what they need.
article at www.ControlDesign.
It usually means that power
com/bang.
t
how NEC standards classify
Katherine Bonfante
INSTALLING AUTOMATION IN
HAZARDOUS AREAS
Learn how to protect
automation system
components when used in
hazardous locations.
WHEN MACHINE BUILDERS
CONTROLDESIGN.COM
HAZARDOUS LOCATIONS
SAFETY HANDBOOK
This handbook educates users
on the proper selection of
electronic weighing systems
used in hazardous locations.
Hazardous Zone Safety
of explosion safety systems:
an environment where hazards
explosion-proof, purge and
are likely to exist under normal
pressurization, and explo-
operating conditions differs
sion prevention. The article
from designing systems for use
looks at the basics of explosion
in standard environments.
prevention and examines what
supplies must follow fieldbus in-
intrinsic safety is and what
If you are looking for more
trinsically safe concept (FISCO)
information on machine safety
or fieldbus non-incendive con-
and intrinsic safety, stop by
cept (FNICO) standards.
our site and check out other ar-
Contributing Editor John
ticles, news, white papers and
Rezabek discusses energy-lim-
products covering this subject.
iting requirements for intrinsic
Visit www.ControlDesign.com/
safety (IS) in his article “DART
machinesafety today.
March 2012 Control Design
7
kbonfante@putman.net
When it comes to working
t
controldesign.com
Boyes recaps the three kinds
designing systems for use in
managing editor, digital media
To download PDF papers,
go to ControlDesign.com/
whitepapers.
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Perfection in Automation
www.br-automation.com
‘Oops’ Just Isn’t Enough
WILL WE NEVER learn that, cli-
using the Internet, particularly
555 W. Pierce Rd., Suite 301
Itasca, Illinois 60143
630/467-1300
Fax: 630/467-1124
ché or not, it’s important to sweat
global search engines. It’s like
the small stuff?
the yin and yang of that relation-
EDITORIAL TEAM
past summer about subatomic
and Costello; it’s Illinois politics
EDITOR IN CHIEF
particles (neutrinos) that showed
and corruption. You don’t get one
up about 60 ns faster than light,
without the other.
JOSEPH FEELEY
jfeeley@putman.net
Remember the story this
ship. It’s Cain and Abel; it’s Abbott
We found that 88% of respon-
when the CERN labs shot them
JIM MONTAGUE
jmontague@putman.net
from Geneva to Italy? Faster than
dents agreed or strongly agreed
light? Time travel? Vacation home
with the statement, “I’ve gotten
on Kepler-22b?
better at search strategies and
MANAGING EDITOR
AARON HAND
ahand@putman.net
ASSOCIATE EDITOR, DIGITAL MEDIA
SARAH CECHOWSKI
scechowski@putman.net
transporter startup company
techniques, and that has helped
get better results.”
Sounds positive. Life is good.
owned by those three guys named
But then we learn that 77% of
respondents agreed or strongly
Science reported in February that
agreed with the statement, “It’s
DAN HEBERT
dhebert@putman.net
the CERN particle physics labora-
a pain to sift through the results,
tory in Geneva admitted that a
but at this point there’s no better
loose fiberoptic cable connection
web-based research tool for me.”
COLUMNIST
JEREMY POLLARD
jpollard@tsuonline.com
DESIGN/PRODUCTION
SENIOR PRODUCTION MANAGER
ANETTA GAUTHIER
ART DIRECTOR
between a GPS unit and a com-
proved our abilities to obtain better
surements that showed neutrinos
search engine results, we’re still
out-sprinting the speed of light.
“There is a screw and you have
to turn it, but we’re not sure if it
DEREK CHAMBERLAIN
was well-calibrated,” said Arnaud
SUBSCRIPTIONS
Marsollier, a spokesman for CERN.
CUSTOMER SERVICE
888/644-1803
CIRCULATION
AUDITED JUNE 2011
Air & Gas Compressors
872
Engineering & Systems
Integration Services
8,472
Engines & Turbines
1,560
Food Products Machinery
1,848
Industrial Fans, Blowers
& Air Purification Equipment
719
Industrial Heating, Refrigeration
& Air Conditioning Equipment
1,377
Industrial Process Furnaces & Ovens
928
Machine Tools
5,622
Materials Handling, Conveyors
& Conveying Equipment
1,595
Metalworking Machinery
3,866
Mining Machinery & Equipment
699
Oil & Gas Field Machinery & Equipment 1,254
Packaging Machinery
929
Paper Industries Machinery
405
Printing Trades Machinery & Equipment 506
Pumps & Pumping Equipment
927
Rolling Mill Machinery & Equipment
210
Semiconductor Manufacturing
Machinery
1,211
Textile Machinery
242
Woodworking Machinery
308
Other Industries & Special Industrial
Machinery & Equipment NEC
6,470
TOTAL
40,020
So, while many of us have im-
puter might have caused the mea-
Will we never learn
that, cliché or not, it’s
important to sweat the
small stuff?
“It would be embarrassing if a
nasty cable is the reason.”
Let that sink in for a moment.
This isn’t an unfortunate loose
not at all happy that there’s nothing
better out there.
This helps explain the disdain
screw-terminal connection in
that many readers still have for
the control panel that delays a
Internet-based research. They
machine commissioning for a
adamantly stick with their local
few hours. This is gazillion dollar
distributor when they need product
physics aimed at finding answers
information. I’ve heard more than
to the nature of the universe.
once how they firmly believe it’s
Imagine how you explain that
one to the boss.
Trying to maintain a level of
quiet dignity, the lab announced
faster and more reliable, even while
conceding that this can limit the
brand scope of possible solutions.
As we learned from this study
that the experiment probably will
last year, respondent age doesn’t
be repeated in May.
seem to make a big difference
Item 2: Some of the findings in
about this, either.
our annual Product Research and
Buying Habits Study (p22) nicely
define the complicated love/hate
relationship most of us have with
March 2012 Control Design
9
jfeeley@putman.net
LORI GOLDBERG
lgoldberg@putman.net
t
Jim, Scotty and Spock. The journal
SENIOR TECHNICAL EDITOR
EDITORIAL ASSISTANT
editor in chief
KATHERINE BONFANTE
kbonfante@putman.net
investment you made in that
t
MANAGING EDITOR, DIGITAL MEDIA
Well, you’d better unload the
Joe Feeley
EXECUTIVE EDITOR
EDITOR’S PAGE
controldesign.com
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WE DIDN’T INVENT
CONTROL,
WE’RE
PERFECTING IT.
Manufacturing in the U.S.
increase wages in order to hold onto their people.
Nonetheless, there is cause for hope in the U.S.
the U.S. economy that is built on manufactur-
manufacturing sector, hinging not only on falling
ing. Within his pledge to improve incentives for
unemployment rates. “North American factory
manufacturers to stay in the country, he said,
activity has increased for the 30th consecutive
“American manufacturers are hiring again, creat-
month and 65% are investing in new technology,
ing jobs for the first time since the late 1990s.”
both very positive signs for expanding growth in
Indeed, manufacturing is looking up and unem-
the manufacturing sector,” says Mitch Free, CEO
of Mfg.com, an online marketplace for industry.
Bureau of Labor Statistics, the U.S. added 330,000
According to Manufacturers Alliance for Pro-
manufacturing-based jobs in 2011. With compa-
ductivity and Innovation (MAPI, www.mapi.net),
nies adding 243,000 jobs throughout the economy
machinery is expected to rise 7% this year, with
in January alone, 50,000 of those jobs were in man-
the motor vehicle market growing 11%.
overseas—a movement called “reshoring.” As we
cracked up to be? Here are some figures to keep
reported in December (www.ControlDesign.com/
in mind: For 35 years (1965-2000), manufacturing
comeback), machinery is among seven sectors that
employment in the U.S. stayed between 16 million
are set to return to the U.S. for manufacturing.
and 19.5 million jobs, notes Josh Bivens, acting re-
This isn’t because of any renewed patriotism,
search and policy director at the Economic Policy
Free explains. “The U.S. dollar has gotten quite
Institute (EPI, www.epi.org). Then the sector lost
weak. Therefore, it’s eroded some of the cost ad-
3 million jobs in the 2000 recession, and today
vantages of producing overseas,” he says. Add to
employs fewer than 12 million workers.
So, although the latest advances on unemployment are worthy of some optimism, we might never see the kind of employment numbers that we
used to. Looking at the job market overall, we’ve
Although the latest advances are
worthy of some optimism, we might
never see the kind of employment
numbers that we used to.
had zero growth over the past 11 years, though the
population grew steadily. Even at January’s pace of
that the cost of making trips to China, rising ship-
acceleration, it would take us until 2019 to return
ping prices as oil prices go up, brokerage costs, a
to full employment levels, according to EPI.
longer work in progress, etc., and “some compa-
Another red flag that EPI’s Heidi Shierholz
pointed out recently is the continued low number
nies are deeming it just not worth the hassle.”
The decision to bring manufacturing back to
of voluntary quits, which dropped by more than
the States will depend in part on how many of
40% between 2007 and 2009, and are still 34%
each item a company wants to manufacture, Free
below 2007 levels. “When job opportunities are
notes. The bigger the order, the more worthwhile
plentiful, employed workers have the chance
it will be to make it overseas. “But companies are
to change jobs that are a better match for their
still nervous about consumer demand, business
skills, experience and interests, and where
demand in America,” he says. “So they would
they are more productive and command higher
rather produce in smaller lot sizes.”
wages,” she writes in a recent blog post. “During
With a 3% uptick bringing reshoring back to
downturns, not only does hiring go down, so does
North America to 22%, it remains to be seen if it
the number of voluntary quits, as outside job op-
can surpass the 38% peak Mfg.com has seen since
portunities become scarce.”
it began tracking. “American manufacturing has
This in turn greatly affects the wages that
never gotten the full throttle White House sup-
workers can earn because not only do they lose a
port that was addressed in the recent State of the
key avenue for wage growth (changing jobs), but
Union that called to return manufacturing to the
employers do not see the need to substantially
United States.”
controldesign.com
March 2012 Control Design
11
ahand@putman.net
It all sounds pretty good. But is it really all it’s
There’s also been news that machinery manufacturing could be coming back to the U.S. from
t
turing sector have grown in the past year.
managing editor
ufacturing. That’s the fastest jobs in the manufac-
t
ployment rates continue to fall. According to the
Aaron Hand
address in January, he laid out a blueprint for
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Plasma Tools Carve Out Place in High Tech
OEM SPOTLIGHT
Plasma-Therm Keeps It Simple Despite the Complexities in Diverse
Industries Like MEMS and LED Manufacturing
ALTHOUGH PLASMA-THERM
(www.plasmatherm.com) was
organized in St. Petersburg, Fla.,
just three years ago, its original
founding actually dates back
to 1975 in New Jersey. After
decades of developments in
plasma etch technology, it was
PLASMA-THERM
acquired in 2000 by Unaxis and
later rebranded as Oerlikon before being reestablished in 2009
through a management buyout.
Working with a wide range
of high-tech industries, the machine builder finds that automation needs differ considerably
TEACHING POSITION
Transfer positions are programmed and checked on a Plasma-Therm MEV
mask etcher using a control display module (CDM) ‘teach’ pendant.
from market to market. “In some
markets, the cost of the end
product as it passes through our
with these markets often have
Therm’s engineers have
system is so high that loss due to
unique needs, such as the
learned that it’s usually best
operator error or handling-sys-
plasma-enhanced chemical va-
to avoid proprietary systems.
tem error is significant enough
por deposition (PECVD) systems
“We once used a proprietary
to justify higher-end automa-
that require automated clean-
embedded computer run-
tion,” says Joe Barraco, software
ing of the process chambers.
ning VxWorks and outsourced
engineer at Plasma-Therm.
MEMS production uses deep
development of the board
“Conversely, some markets that
silicon etch (DSE) reactors to
support package (BSP),” Bar-
are primarily R&D do not neces-
etch deep yet narrow features
raco recalls. “This proved to be
sarily have the capital to justify
with very smooth sidewalls.
very expensive, and when the
large-scale automation, so lower-
“Very fine control of the pro-
supplier learned that it would
cost systems with less automat-
cess is absolutely necessary to
be very costly for us to change
ed controls are justified.”
achieve these requirements,”
hardware platforms, they
Barraco says. “Our control
raised their prices dramatically.
some customers start so small
systems dynamically manage
On top of that, the custom-
that they have only enough capi-
all of the parameters within
build kernel turned out to be
tal to get manually loaded wafer
the reactor, including pressure,
buggy. At the time, Windows
systems, Barraco says. “Our
reactor temperatures, gas mix-
PCs didn’t have the horsepower
Versaline product allows these
tures, RF energy, electrode po-
to meet our controls timing
customers to grow their systems
sitioning, and process timing.
needs, but thanks to Moore’s
along with their businesses,”
In the MEMS market, timing is
Law, it wasn’t long before that
he says. “These systems can be
especially critical.”
changed. PCs now run unbe-
In the LED and MEMS markets,
initially configured as a single-
Despite the seemingly
lievably fast processors with
wafer tool, and later converted to
complex technologies it works
large amounts of memory. Our
a full cassette-to-cassette multi-
with, Plasma-Therm’s software
timing concerns had been ad-
chamber system as the customer
development philosophy is to
dressed, so we made the switch
moves from initial development
keep it simple. “If it sounds too
and now control most of our
into full production.”
complex, it is,” Barraco says.
equipment with industrial PCs
The processes associated
controldesign.com
Along these lines, Plasma-
running Windows.”
March 2012 Control Design
13
INDISCRETE
STEM Students Scared
by ‘Hard’ Factor
ONE KEY REASON kids in
good enough, and that the cost
grades 6-12 don’t pursue STEM
and time involved in getting a
careers is that their math and
STEM degree is too high.
science grades aren’t good
Split them out by gender, and
enough; although they feel cer-
the situation gets even direr for
tain STEM careers offer the most
the girls. Almost a third of the
job opportunities, they’re afraid
girls strongly agree that math is
they won’t measure up. This is
their most challenging subject,
according to a survey from ASQ
compared with 19% of the boys.
(www.asq.org), conducted in an-
And girls interested in pursuing
ticipation of National Engineers
a STEM career are four times
Week last month.
more likely than boys to believe
ASQ and its membership of
more than 14,000 engineers are
concerned about ensuring a
that their teachers are not preparing them well enough.
In a later survey, ASQ also
skilled workforce with educat-
asked engineers for their per-
ed engineers, so they wanted to
spective. They conceded that,
find out what might keep that
yes, study was a challenge.
workforce from developing.
Almost half of them said the
They discovered that, of those
amount of work and study need-
students interested in pursu-
ed to succeed was the primary
ing a career in STEM, 67% are
challenge, and another 14%
concerned about the obstacles
said maintaining high grades in
they would face.
related subjects like math and
Students see three main
science was their key challenge.
obstacles to pursuing a STEM
Other challenges included lack
career:
of mentorship, poor-quality
r5IFDPTUBOEUJNFUPHFUB
teachers, selection of engineer-
degree in STEM is too high
ing degrees available at local
compared with other subjects.
universities, and a lack of prep
r5IFJSHSBEFTJO45&.TVCKFDUT
of math and science aren’t
good enough.
courses in high school.
However, only 3% of the engidissatisfied with their career
too much work and studying
choice. Their advice? “Study
compared with other careers.
hard and don’t give up.”
ASQ also surveyed parents of
“While pursuing an engi-
children aged 10–17 to get their
neering degree has its chal-
perspective. More than half
lenges, it’s a worthwhile cause
(53%) of the parents who had
and one that can lead to a life-
kids interested in STEM careers
time of satisfaction,” said Jim
also expressed concerns, with
Rooney, ASQ chair and quality
about a quarter of them saying
engineer with ABS Consulting.
that their children are not being
“Students considering pursuing
prepared enough by teachers
a degree in a STEM-related field
in STEM subjects. In addition,
should be passionate about it
18% worry that their children’s
and be prepared to work hard
grades in STEM subjects aren’t
to be successful.”
Control Design March 2012
March 6, 1997:
Britain’s Queen
Elizabeth II launched
the first official royal
website.
March 4, 1998: Microsoft
repaired software that
apparently allowed hackers
to shut down computers in
government and university
offices nationwide.
March 12, 1998: Astronomers
cancelled a warning that a
mile-wide asteroid might collide
with Earth, saying
that calculations
had been off by
600,000 miles.
March 25, 1998: The U.S. Federal
Communications Commission
(FCC) netted almost $580 million
at auction for licenses for new
wireless technology.
March 8, 1999: The White House
directed the firing of nuclear
scientist Wen Ho Lee from his
job at the Los
Alamos National
Laboratory because
of alleged security
violations.
March 10, 2000: The dot-com
bubble burst.
neers surveyed said they were
r45&.EFHSFFDBSFFSTJOWPMWF
14
FLASHBACK
1997-2012
March 24, 2001: Apple
Computer’s operating
system MAC OS X
went on sale.
March 7, 2003: Scientists at the
Stanford Linear Accelerator
Center announced that they
had transferred 6.7 GB of
uncompressed data in 58 seconds
over 6,800 miles.
March 20, 2003: Cisco Systems
announced it was buying The
Linksys Group for $500 million
in stock.
controldesign.com
©2012 Siemens Industry, Inc.
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I/O and communication modules, providing flexible extension
options to meet your needs. The system also offers a PROFINET
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between the engineering system, controllers, and HMI, increasing
the range of possibilities in the field of compact automation with
SIMATIC S7-1200.
www.usa.siemens.com/controllers
2011 Robot Sales Exceed Expectations
SALES OF INDUSTRIAL robots
tion of Robotics (IFR, www.ifr.
reached a new peak level of
org). This is an increase of about
try was the main driver of the
about 150,000 units last year,
30% over 2010, which already
strong growth. Last year, how-
according to recent estimates
had seen considerable recovery
ever, robot suppliers reported
from the International Federa-
following 2009’s downturn.
a significant demand increase
In 2010, the automotive indus-
from other industrial sectors.
“Thanks to the demand of
emerging countries, including
China, the sales of factory automation apparatus are increasing,” said Shinsuke Sakakibara,
IFR’s president. “However, the
growth of sales of machine
tools seems to be slowing down
under the influence of Europe’s currency crisis and/or a
Chinese tight-money policy. But
this does not apply to robots.”
Although robot manufacturers expected continued
improvement in 2011, the 30%
growth exceeded expectations,
according to Arturo Baroncelli,
IFR’s vice president, and robotics proposal manager at Comau.
Robot suppliers throughout industry noted the same
trends in their own businesses,
each pointing to record sales
in 2011, particularly in their
Asian markets. “Growth in the
automotive sector continued
unabated and was strongly supported by an increased uptake
in growth segments such as
electronics, solar, and food
and beverage,” said Per Vegard
Nerseth, head of ABB Robotics.
“We fully expect this growth to
continue through 2012 with the
increased demand throughout
the Asia region continuing to
be an important factor.”
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© Allied Electronics, Inc 2012. ‘Allied Electronics’ and the Allied Electronics logo are trademarks of Allied Electronics, Inc.
An Electrocomponents Company.
Solar Equipment
Opportunity Abounds
ALTHOUGH REVENUE DECLINES
that requires upgrade in 2012, and
of more than 65% are predicted
this figure will steadily ramp up
this year for the photovoltaic (PV)
over the coming few years,” said
manufacturing equipment sector,
Tim Dawson, senior research di-
according to IMS Research’s (www.
rector at IMS. “Companies wishing
imsresearch.com) latest quarterly
to remain competitive and take
report, the analysts contend that
the opportunity to gain market
there is a 20 GW, $25 billion op-
share will be forced to invest in
portunity over the next four years
new equipment.”
as manufacturers replace aging
Market shake-out will spur fur-
equipment, either via upgrades or
ther equipment demand, Dawson
complete replacements.
added. “Manufacturing equipment
Because of overcapacity in 2011,
companies that stand to benefit
manufacturers of solar ingots, wa-
most are those that have a clear
fers, cells and modules are putting
equipment upgrade strategy avail-
less emphasis on ramping produc-
able to their customers,” he said.
tion capacities, IMS said. The
“Furthermore, companies that will
majority of equipment revenues
resist the shake-out best will be
this year will come from the need
those who can go through these
to replace existing tools.
equipment upgrades with the least
“IMS Research has estimated
disruption, readying themselves
that there is between 2.5 and 4 GW
for the time when end demand
of existing manufacturing capacity
does ultimately pick up.”
NOTEWORTHY
The Mechatrolink Members Assn. (MMA, www.mechatrolink.org) is
running a membership drive that lets end users, machine and robot
builders, system integrators and motion control suppliers join the
association as a Regular Member for free. The offer is good through the
end of March.
Stop wiring.
Start connecting.
Ashcroft (www.ashcroftinc.com), which produces a range of electronic
and mechanical pressure and temperature measurement instruments,
celebrates its 160th anniversary this year.
SmartWire-DT from Eaton
eliminates point-to-point
wiring in control cabinets
and replaces it with this
simple eight wire connector.
MERGERS, ACQUISITIONS & ALLIANCES
Automation system provider PaR Systems (www.par.com) acquired the
friction stir welding (FSW) product line from MTS Systems (www.mts.
com), expanding PaR’s manufacturing process technology. PaR Systems will
continue to support all current customers of MTS’s FSW products, and will
pursue further development of the technology.
Imagine the time and labor
savings. Learn more today.
Fanuc Factory Automation America (www.fanucfa.com) and Wynright
(www.wynright.com) collaborated to automate and optimize Fanuc’s CNC
system inventory management. Wynright designed the Goods to Person
(GTP) system to automate the motion control system.
18
For more information, visit us at
Eaton.com/smartwire-dt
Control Design March 2012
controldesign.com
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millions of electrical products used in hazardous locations and on other electrical devices that must provide spark-free performance.
The CSA C/US mark signifies these products meet U.S. and Canadian standards for safety or performance. CSA International can
help you streamline product evaluation and reduce time to market. And when supply chain or market opportunities expand
your focus, we also deliver local service in Asia and Europe. Electrical products used in hazardous locations must inspire total
confidence. For total confidence in your testing laboratory, choose CSA International.
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environments—we put it all together for you.
As part of our anniversary look back at the
content we’ve created over our 15-year
history, we present the first column that
Jeremy Pollard wrote in February 1999,
as an OEM Insight guest columnist. In April 1999, he
became the first Embedded Intelligence columnist, and
he’s been here ever since.
Can vendors, machine OEMs, and the OEM’s customers sing
in perfect harmony, as the song goes? In my view, absolutely
not. Their agendas are totally different.
As an OEM making machines or full systems, you have an
obligation and desire to provide your customers with the best
possible product at a profitable price. You need to provide service for that product, as well as a migration path for your future
products and services. Vendors are constantly pounding the
OEM marketplace, since that market represents the largest potential return for sales investment. That’s return for the vendor,
not the OEM and not for your customers. How can you protect
yourself against the sales-oriented vendor, and keep focused on
your specific, and often unique, primary targets?
Customers look for solutions that make their end product
more profitable with lower lifecycle costs, as well as all the
normal needs like maintainability and low cost of ownership.
Most of the time they don’t care too much about the actual
details of the control system if the process is up their alley.
Maybe this makes the product or service the most important,
and not the control system.
Take an example where your process technology is established and proven, as is your control system. Now, suppose a vendor of PC-based control presented its case for the
benefits of the technology. This applies to all new stuff like
bus networks, etc. Your customer base, however, is entirely
PLC-knowledgeable.
Now you may be torn between accessing perceived benefits
of this new technology, and risking the lack of acceptance from
your customers. Easy choice, I think—the customer wins.
But now, take a second example. What about those customers who the vendor has been to see, and, as a result, the cus-
tomer suggests that you change your control system? Has the
vendor presented his case honestly? Remember that you will
be the one to implement the solution. How will you know what
the influences were on your customer?
The obligation you as an OEM have to your own organization is not necessarily that of the vendors or of your customers.
Your needs are very different than the other two groups. So
how can you keep from getting led down the garden path?
When General Motors forced the use of flowcharting in
an engine plant project, the OEMs had it shoved down their
throats. No choices there, but some swore never to use it
again. They lost tons of dough because they were not familiar with the issues since they listened to the vendor and
customer, and got “hosed.”
Windows CE may be the next one down the line. There is no
effective difference with Windows CE as compared to QNX
or WindRivers’ Tornado as an operating system. But the perceived benefits—and there will be some genuine development
benefits—will most likely be presented in the best possible
view for the group presenting it. If they make it sound as though
it’s good for you, be very suspicious. Prove to yourself that the
worth and benefits of the technology will serve you best, and
not the vendors, or customer for that matter.
This makes the issues surrounding the OEM and new
technology varied and very different from the technology issues that affect the general-user public. The technology horizon is a changing landscape. It is estimated that technology
half-life is now two years for control and computer software.
Software has already been recognized as the future of control technology.
To make sure that you don’t get snowed, it may be worthwhile to investigate the technology that you think you’ll one
day need before you actually need to use it. Investigate the
products as well as the history of the supplier or suppliers involved. Remembering that you have to support any product you
sell, it is important to weigh the longevity of the technology as
well as the supplier.
Who in your company will be responsible for monitoring and
evaluating technology? Someone has to!
Don’t get snowed. Investigate the technology that you think you’ll
one day need before you actually need to use it.
Jeremy Pollard, CET, has been writing about technology and software issues for many years. Publisher of The
Software User Online, he has been involved in control system programming and training for more than 25 years.
Email him at jpollard@tsuonline.com.
21
by Joe Feeley, editor in chief
Some of the Web-Based Methods Available to Do Automation Product
Research Still Hold Little Currency for Many Machine Builders
hether it’s money, time or resources, it
this audience—occasional level of use has grown past
usually isn’t wise to invest heavily in a
40%, compared with about 14% in 2008.
new approach until you have a better
“Videos about products or vendors help me evaluate
sense of the potential value it can bring. Sometimes
their capability and competence,” says Gary Cash, vice
there’s not much change at all in the beginning.
president of design services at Wynright Intralogistics
Month-to-month change might be unperceivable.
(www.wynright.com/intralogistics) in Elk Grove Village,
Even year-over-year data might not reveal true pat-
Ill. “You should collect links to videos in one place. I
terns. It can take longer to find the emerging trends.
view them as I see them. It would be nice for Control
That’s what we learn each year we conduct our
Design to sponsor/list a series of videos showing prod-
audience study to summarize their product research
ucts in a similar way so they can be compared (similar
preferences and buying habits, including adoption
to CNET Reviews). If this exists, I haven’t found it.”
of methods such as social media and Internet-based
Podcasts remain largely ignored by nearly nine of 10
video and audio options. There is no mistaking it’s a
respondents, although occasional or better frequency
rather leisurely amble toward greater levels of change
of use doubled since 2008.
among this group.
Here in the early stages of our second decade of the
The trend for blogs can be termed “encouraging.”
Although our respondents still make no regular use
new millennium, more user-friendly websites and
of them for their jobs, the segment that says it reads
greater bandwidth give web-based product-research
blogs occasionally has inched up to 23%, from 19% in
options legitimacy alongside traditional product
2008. The “never” group remains at 11%, but that’s a
catalog and distributor-centric methods for machine-
significant change from a 29% bloc in 2008.
automation specifiers.
We first started to ask the Control Design audience
about its preferences in 2006, and have added questions as research options grew in subsequent years.
Digital Tool Destinations
The slowly accelerating affinity for use of webcasts as a
source of research looks to have temporarily idled (Table
I). In 2008, 16% of respondents said they used webcasts
occasionally. This year it’s a clearly better 29%—but
that’s identical with the 2011 finding, with the biggest
support (54%) coming from the 30–39-year-old study
participants. Although there’s been little change in those
who claim more frequent use than monthly, those of
you who say you’ve never used webcasts for your job
dropped to 4% compared with 26% in 2008.
Product videos and machine automation videos are
one category that shows an increased acceptance by
22
Control Design March 2012
controldesign.com
YOUR USE OF WEB-BASED METHODS OF INFORMATION DELIVERY
Table I
Never use for
job, but use
socially
Use often
(weekly) for job
Use occasionally
(monthly) for job
Use rarely
(monthly) for job
‘12
‘11
‘08
‘12
‘11
‘08
‘12
‘11
‘08
‘12
‘11
‘08
‘12
‘11
‘08
Webcasts
7%
5%
5%
29%
29%
16%
48%
45%
38%
4%
5%
26%
13%
17%
15%
MP3s/podcasts
(interview vendors)
2%
0%
2%
19%
12%
5%
43%
47%
25%
7%
4%
46%
29%
37%
22%
MP3s/podcasts
(interview machine builders)
4%
2%
2%
9%
8%
4%
45%
46%
21%
5%
5%
51%
38%
39%
22%
Videos from/about
vendors/products
5%
2%
3%
49%
36%
20%
33%
49%
49%
1%
5%
19%
11%
10%
10%
Video interview of machine
builders discussing automation
on machine
6%
1%
3%
33%
35%
8%
41%
46%
34%
4%
5%
42%
16%
13%
13%
Forums/bulletin boards
15%
15%
14%
34%
32%
41%
30%
32%
29%
6%
6%
11%
15%
15%
4%
Blogs
8%
4%
7%
23%
18%
19%
30%
38%
30%
11%
11%
29%
29%
29%
15%
Twitter
1%
1%
4%
2%
N/A
11%
6%
N/A
13%
11%
N/A
70%
79%
N/A
Facebook
3%
1%
6%
2%
N/A
7%
5%
N/A
29%
30%
N/A
56%
62%
N/A
LinkedIn
6%
4%
18%
14%
N/A
23%
18%
N/A
14%
17%
N/A
39%
47%
N/A
Virtual trade shows
2%
0
10%
11%
N/A
34%
40%
N/A
5%
3%
N/A
49%
46%
N/A
Bulletin board/forum use consistently pulls a 15%
weekly use and 34% occasional use; that number has
Nope, not
even socially
are just a plug for a specific company.”
This sums up a number of typical responses:
been unchanged in the four years of the study. It car-
“None [of these tools] are bad; they just don’t fit
ries most support—about 44% occasional or better—
my needs. I can’t take time out of my day for a live
among the 20–39 age groups.
webcast, social networks (Facebook, LinkedIn) are
“Forums/bulletin boards are best for me,” says an
blocked at the office, and most of the videos/pod-
engineering manager for a manufacturing company
casts that are downloadable are nothing more than
in India. “Companies are not yet using the forum/
sales pitches.”
bulletin board medium fully. Personally, I would
prefer if all my suppliers maintained forums
with open access, because when you have a
problem/query, chances are someone has
already encountered it and someone else
has already answered it.”
A technical project leader at a
packaging goods manufacturer in Massachusetts agrees.
“Forums generally help
particularly as it affects webcasts. Many say they
can’t make the time for a live webinar presentation.
This might be a message to the supplier community that you’re not making the archive option clear
enough in your promotions.
“Of these choices, I use some supplier tech support
forums when I am doing a project with their stuff from
time to time,” says a study respondent who works for
me the most as they are
an electroplating company. “But my first choice is just
a good source for strange
to call the manufacturer’s tech support line where
problems,” he says. “Pod-
that is available or encouraged. A very few vendors
casts are usually too long
offer webcasts that are actually useful in helping me
and boring, and don’t relate
to my projects, and in general
controldesign.com
A surprising number of respondents are either unaware of or don’t fi nd enough “on demand” content,
use all of the capabilities of the product. The only time
I use webcasts is if a vendor has a webcast available
March 2012 Control Design
23
INFLUENTIAL AUTOMATION SUPPLIER FACTORS
for on-demand viewing after the initial
Extremely important
presentation. The rest of this stuff is just
Important
‘12
‘11
‘06
‘12
‘11
‘06
Easy to use, install and maintain
54%
56%
75%
43%
42%
24%
Dependable after-sales
service and support
55%
54%
60%
42%
42%
39%
Offers highest product quality
44%
51%
57%
55%
48%
42%
Connects easily with
existing systems
36%
48%
64%
57%
48%
33%
Well-organized website
for research
42%
40%
33%
49%
52%
57%
last year, and one in 20 report occasional
Offers leading technologies
30%
32%
31%
55%
51%
60%
or more frequent use.
Financially stable company
22%
23%
32%
58%
63%
63%
Currently installed in your facility
17%
15%
20%
49%
43%
48%
never gone to a supplier Facebook page.
Lowest price
9%
12%
11%
49%
55%
65%
Of those that commented about it,
Strong brand name
8%
11%
15%
55%
56%
60%
10%
11%
N/A
61%
55%
N/A
shows similar results, with 9% saying
Read/view/hear about
favorable outcome by a user
via independent source
(magazine, website, video)
they have some occasional job-related
Can buy product from website
11%
8%
9%
30%
31%
28%
useless blather and a waste of bandwidth,
as far as I am concerned. I do not use
Facebook, Skype or Twitter.”
We asked about more-recently emerging social media as product information
delivery tools. About 70% of the respondents don’t use Twitter for any purpose,
although that’s an improvement from 79%
A rather unambiguous 97% of this
year’s study respondents say they’ve
almost all of them didn’t realize that
suppliers had them. Other Facebook use
activity with it.
Tough application,
ingenious solution
Exactly
Mastering challenges together — Rexroth makes it easy to implement automation.
Our many years’ experience in a wide range of industries has given us extensive application
knowledge. We offer this comprehensive understanding to the tasks you bring us, leading
to ingenious solutions.
Regardless of the drive technology used, we thought ahead and integrated intelligence
throughout. This consistency makes you more efficient — from planning to start-up and
daily operation. Your benefits are real: Increased productivity, improved energy efficiency
and maximum machine safety. You can count on Rexroth to have the appropriate drive and
control solution to meet your needs exactly.
Bosch Rexroth Corporation
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Happier Relationships?
products showed the most churn,
In the seven years we’ve conduct-
while safety components and me-
ed this study, we’ve asked about
chanical components had the least
the stability of the participants’
supplier turnover.
supplier relationships. We learned
For the first time, price is no
again this time that more than
longer the most-mentioned reason
half of the responders changed a
to change suppliers. It remained at
supplier for one or more primary
29%, but quality/performance was
automation component in the past
noted by 33% of the respondents,
12 months (Table II).
up from last year’s 24%.
This time, 57% said they’ve
made a change or changes in the
Your Favorites
past year, up slightly from the
We always ask study participants
55% we found last year, and the
about their primary method for
remarkable 62% result in the midst
doing product research (Table III).
of economic instability in 2009.
The use of vendor websites sig-
Controllers, sensors and OI/HMI
nificantly again outpolled the use
CHANGE STILL THE NAME OF THE GAME
2012
57% YES
2011
2009
55% YES
62% YES
Yes? Which ones?
‘11
‘09
40%
Controllers
43%
47%
Machine safety components
21%
45%
32%
Motors/drives
28%
45%
44%
Sensors/measurement
44%
42%
43%
Operator interface/HMI
42%
40%
17%
I/O
37%
39%
35%
Mechanical components
32%
31%
16%
‘12
‘11
‘09
Price
29%
29%
38%
Quality/performance
33%
24%
29%
Discontinued product line
10%
12%
9%
Poor after-sales support
11%
12%
9%
Wanted open-standards architecture
4%
14%
9%
Old supplier merged/was bought
by another company
4%
5%
4%
Why?
26
‘12
Control Design March 2012
Table II
Did you change your primary supplier for these types of
control and automation components in the past year?
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VARIATIONS IN RESEARCH METHODOLOGY
directly with the manufacturers’
What is your primary method to do product research?
product experts ranks third.
‘12
‘11
‘06
Meet/speak with local distributors
27%
26%
31%
Meet/speak directly with automation suppliers’
technical engineers/product managers
23%
25%
15%
Visit suppliers at trade shows
4%
1%
1%
Attend supplier(s) user group conference/event
1%
2%
N/A
Search independent, non-vendor websites
(automation communities, magazine websites)
6%
9%
20%
Search the suppliers’ websites
34%
33%
30%
Read trade magazines
5%
4%
2%
“I am fortunate that when I
need something, I make a call to
my local distributor engineer and
somewhere between 20 minutes
and 24 hours they are here to see
Table III
most-preferred method. Meeting
what I need and we get the order
placed before they even leave the
building,” says Ray Bergeron, an
engineer with many duties at Geiger (www.geiger.com), Lewiston,
Maine, the company that’s been
printing the Farmers’ Almanac
since 1878. “If I do get stuck on
my own and have to do my own
research, I need a website that
shows the product, shows some
application examples, and at least
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shows a list price. If they don’t
mind, 79% of respondents named
search, 25% of the respondents
have these, I move on.”
Google. That’s an increase from
to this unaided question couldn’t
73% last year. Asked what they
name one, and 30% insisted on
web they start if they don’t have
considered the best non-vendor
naming Google again; 6% named
a specific vendor or brand in
website for their product re-
GlobalSpec and 5% touted Wiki-
When asked where on the
pedia. ControlDesign.com was
named by 10%. Many other sites
garnered admirers, but none
reached the 5% threshhold.
Over the past several years,
study respondents seem to have
grown a little happier with global
search methods than they have
been before (Table IV). Again this
year, nearly 90% of the respon-
DEMOGRAPHICS
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Assembly
7%
Electronics pick and place
2%
Machining centers
5%
Material handling/
transport systems
6%
Metalworking
12%
One-off, custom
14%
Packaging
11%
Paper industry
4%
Plastics/thermoforming
3%
Printing and converting
4%
Rolling mills
2%
Semiconductor tools
4%
System integration
23%
Textile
2%
Woodworking
2%
Other
10%
Job function
1 800 358-9068
www.parker.com
Control system design/
engineering
55%
Company management
20%
Tech support
12%
Research/development
9%
Other
3%
Responses from 250+ study participants
controldesign.com
THE SEARCH FOR A WELL-TUNED ENGINE
Table IV
Technical search using global search engines
You agree or strongly agree that:
‘12
‘11
‘10
‘09
‘08
The first page (or more) of results
contains well-focused hits
79%
78%
76%
82%
82%
Too many results are biased, vendor
product plugs
40
67%
61%
70%
69%
68%
Advancing Automation
Too many results are outdated
45%
47%
52%
51%
61%
Too many results have nothing to do
with what I’m looking for
71%
70%
75%
73%
77%
It’s a pain to sift through the results,
but at this point there’s no better
web-based research tool for me
77%
74%
73%
76%
82%
I’ve gotten better at search strategies
and techniques, and that has helped
get better results
88%
90%
N/A
N/A
N/A
dents agree with the statement
that they’ve gotten better at search
strategies and techniques.
years
The future today:
CPX
r5IFZTIPVMECFBCMFUPFBTJMZ
access pricing information. Don’t
make them register to get it.
r'FXBSF0,XJUIQSPWJEJOH
What Makes a Site Good?
contact information early in the
To learn what this audience judges
process. Many say it’s a barrier
to be a useful supplier website to
they won’t cross.
do product research, we asked a
“Give me immediate access to
few open-ended questions and,
engineering data without having
not surprisingly, we received
to fill out a request form or give my
many thoughts. We did the same
family history,” says our electro-
for determining what they think is
plating engineer. “The needed
a non-helpful site.
information should be available on
“Make it easy to find and compare
the website and should be accurate
products,” Wynright’s Cash says.
and up-to-date. A bad site usually
“Have tech specs available on the
means having to complete a ‘re-
site, because I probably have a very
quest form,’ which almost invari-
specific use for this product and
ably leads to a time-wasting sales
want to know if it will do the job.”
phone call that is not needed dur-
Picking through the data reveals
For more information:
Call:
1-800-Go-Festo
ing the initial phases of selection.
a few other common thoughts
I will call if I want to talk to a sales
about supplier websites:
or, more often, tech support per-
r6TFSTXBOUFBTZUPàOEBDDFTT
son. I’ve seen bad sites where the
needed detailed engineering data is
technical explanations, not mar-
not available even after filling out a
keting points of view. Make them
form. If I must call to get questions
downloadable as PDFs if desired.
answered and another supplier offers complete data easily available
understand a supplier’s part
online and their product is suitable,
numbering system.
I put them in the spec.”
controldesign.com
March 2012 Control Design
1-800-463-3786
www.festo.com/us/cpx-ia
Global manufacturer of process control
to product manuals, specs and
r5IFZEPOUXBOUUPIBWFUP
Integrated automation for the
21st century: CPX.
For maximum modularity and
flexibility with remote I/Os.
And for best in class motion
controls and pneumatics.
31
and factory automation solutions
Protect
what’s
inside.
Crenlo® products are made to keep your technology safe and secure. As an industry leader in the
design, manufacture, and integration of high quality enclosures, we offer: standard Emcor®
enclosure solutionsZKLFKFDQEHPRGL¿HGWRPHHWWKHQHHGVRIPRVWDSSOLFDWLRQVDQGcustom
Crenlo enclosure solutions, which can be built for any application, ranging from inverter enclosures
to package drop boxes. The only thing stronger than our enclosures is our commitment to customer
satisfaction. At Crenlo, we see enclosures differently.
Crenlo leads the market in premium enclosures by providing:
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‡0RELOHSURGXFWVWKDWSURWHFW\RXUHTXLSPHQWRQWKHURDG
‡3URGXFWVWKDWFDQEHPRGL¿HGIRU\RXUDSSOLFDWLRQ
_ZZZFUHQORFRPHQFORVXUHVSURWHFW
We see enclosures differently.
‹&UHQOR&DE3URGXFWV,QF$OO5LJKWV5HVHUYHG&UHQORŠDQGWKH&UHQORŠ/RJRDUHUHJLVWHUHGWUDGHPDUNVLQWKH
8QLWHG6WDWHVDQGYDULRXVRWKHUFRXQWULHVRI&UHQOR&DE3URGXFWV,QF
‹(PFRU(QFORVXUHV,QF$OO5LJKWV5HVHUYHG(PFRUŠLVDUHJLVWHUHGWUDGHPDUNLQWKH8QLWHG6WDWHVDQGYDULRXV
RWKHUFRXQWULHVRI(PFRU(QFORVXUHV,QF
INPUT/OUTPUT SYSTEMS
Arc Flash: Not My Fault
End Users Are Responsible for Keeping Workers Safe From Electrical Hazards,
but More of the Onus Is Now on Machine Builders
by Aaron Hand, managing editor
ALTHOUGH STANDARDS HAVE EVOLVED to help
keep workers safe around electrical equipment, tens
of thousands of electrical accidents occur each year
in industry. According to the National Fire Protection
Assn. (NFPA, www.nfpa.org), hundreds of deaths and
thousands of disabling injuries occur each year.
Arc flashes are responsible for about 80% of the
electrical-related injuries, and can cause severe personal injury and equipment damage when an arc fault
superheats the air around it, expanding and creating a
pressure wave within an electrical enclosure. Explosions can be as hot as 35,000 °F, and can send shrapnel
and molten metal flying out from equipment (Figure 1).
NFPA 70E dictates the precautions that manufacturers
should take with their electrical equipment. It provides
HOFFMAN
guidelines on hazard/risk classifications, personal protective equipment (PPE), arc flash boundaries, etc.
Push Back on OEMs
Because it is the factories that are mandated to keep
HOTTER THAN THE SUN
their own workers safe, the bulk of the responsibil-
Figure 1: Arc flash explosions can be as hot as 35,000 °F, and can
send shrapnel and molten metal flying out from equipment.
ity falls to them to make sure equipment is properly
labeled, the appropriate level of PPE is provided, and
workers are properly trained.
As standards tighten, users are beginning to put
some of the burden back on the machine builder.
“Some customers are requiring us to isolate the high-
open up the panel, no problem. You don’t want to create
a situation where somebody’s trying to work on the
logic right above a high-voltage area.”
Filamatic takes other steps as well, including data taps
voltage areas from the low voltage that we would
and/or Lexan windows in panel doors so they don’t have
use for PLCs and sensors on the machine,” says Chris
to be opened as often; interlocks and other hardware
Lovendahl, sales manager for Concep Machine (www.
that make it harder for users to open panels without
concepmachine.com), Northbrook, Ill. “We are physi-
thinking; and coordinated fuse protection. A trend
cally separating them so that technicians can debug or
toward finger-safe devices also plays a part in improving
troubleshoot the controls system without the require-
safety, Chopper says. “It used to be lugs were wide open,”
ments for the protective gear.”
he says, describing how easy it would be to create a fault
Filamatic (www.filamatic.com) in Baltimore also has
been separating high- and low-voltage components.
by dropping a wrench across open copper bus bars.
It’s a growing debate as to just how much responsibil-
“We put logic on one side, power on the other side of
ity machine builders should take, says Wayne Tompkins,
the panel,” says Jack Chopper, chief electrical engineer.
global marketing manager for Rockwell Automation
“That way if you need to troubleshoot the logic, you can
(www.rockwellautomation.com). “What we’re starting to
controldesign.com
March 2012 Control Design
33
TIME TO SUIT UP?
NFPA 70E standards define the level of personal
protective equipment (PPE) needed for a given
hazard classification. Figuring out the hazard level,
however, can be difficult to do, so manufacturers are
sometimes at a loss as to just how much protection
each worker needs to wear.
“One of the things that our customers have tried to do
is to put the workers in as much PPE as possible so they
can be safe,” says Wayne Tompkins, global marketing
manager for Rockwell Automation. “But when an
electrician has been doing the job for 20 years, and for
the first 19 years he did it with just gloves and safety
glasses and now he’s being told he has to wear a whole
arc suit, he has a hard time accepting that.”
Just as having to shut down the power to equipment
can mean a big productivity hit, having to put on all
the clothing and gear necessary to protect against the
high heat of arc flashes is also seen as a productivity
loss. “If we can allow technicians to get at the controls
of the machine, which tends to be low-voltage
equipment, without the need for protective gear, we
can make their tasks easier to complete,” says Chris
Lovendahl, sales manager for Concep Machines. “In
this way, we reduce the need for protective gear and
that does not reduce their productivity; they do not
need the time to suit up.”
It’s not just the time it takes to don the PPE gear that
hurts productivity, notes Jack Chopper, senior electrical
engineer at Filamatic. It’s also that PPE can make it
difficult to get the job done. “You can’t feel things,
you can’t hold tools, you can’t maneuver like you could
otherwise,” he says. “The equipment is so cumbersome,
it’s hard to troubleshoot with all that equipment on.”
By introducing solutions that let workers perform
jobs remotely, with doors closed, machine and MCC
builders also remove the need for protective gear,
either increasing productivity or reducing the chance of
sustained injuries.
see is that the end user is pushing
back on them saying you need to
Positioned for Tough,
Compact Applications
design me a safe machine,” he says.
Novotechnik’s TX2 Series’ pivot-head mounting can handle up to ±12.5° of
offset from misalignment without affecting performance. The TX2 is
designed for mobile and other tough environments with
heavy-duty construction featuring a stainless
steel rod and metal housing. It is
sealed against ingress of
dust and liquids.
from users who are becoming more
Lacking Proper Training
Such solutions are increasingly necessary in part because of demands
aware of arc flash hazards, Chopper
says, but also because of just the opposite: more people servicing these
units with less training than their
predecessors.
In 2007, the Occupational Safety
and Health Administration (OSHA,
www.osha.gov) changed how it defines a “qualified person” from one
Specifications
• Stroke lengths from 25 to 300 mm
• Very long life to 50 million movements
• Resolution better than 0.01 mm
• Repeatability to 0.01 mm
• Linearity up to ±0.05%
familiar with the construction and
operation of the equipment and
the hazards involved to one who
has actually received the proper
training and has demonstrated
skills and knowledge.
Unfortunately, the “demonstrated skills” often are lacking,
For complete TX2 information, visit www.novotechnik.com/tx2
Novotechnik U.S., Inc.
155 Northboro Road • Southborough, MA 01772
Telephone: 508-485-2244 Fax: 508-485-2430
according to Patrick Ostrenga,
compliance assistance specialist
controldesign.com
INPUT/OUTPUT SYSTEMS
for OSHA. “Often I hear, ‘Oh, he’s been doing that for
24 years,’” he said during a Plant Services webcast about
how to set up an arc flash mitigation program (www.
ControlDesign.com/arcwebcast). “But what skills has
he had and what training does he have? And oft-times
we accept time in place of those real demonstrated
skills. And oft-times that leads us to a failure.”
Unpredictable
So machine and panel builders are taking what steps
they can to keep arc faults from occurring in the first
place. “It’s a two-tiered approach,” says Garrett Potvin,
global product manager for arc flash safety products
at Pentair Technical Products’ Hoffman (www.hoffHOFFMAN
manonline.com). “You want to lessen the number of
times an electrical worker has to open a cabinet, and
also make it safer when they do have to open it.”
POWER ISOLATION
Figure 2: The Sequestr enclosure helps to mitigate arc flash
occurrences when working on interior components by isolating
incoming power from the main enclosure.
For the first tier, Hoffman has enclosures that
include Intersafe data interface ports, which allow access to the programming devices inside the enclosure
without opening the enclosure door; and external
INPUT/OUTPUT SYSTEMS
data pockets, an alternative to placing reference
happens and there’s an arc flash there. If it’s severe
manuals inside the cabinet.
enough, the explosion can propagate to other units.”
In the event of an explosion, Siemens’ arc-resistant
Hoffman’s second-tier solutions include a disconnect switch that cuts the power to most if not all of
tiastar MCC directs the arc blast, including the heat,
the components inside when a handle is pulled. The
plasma and pressure, away from workers.
For its latest technology to address arc flash, Rock-
company’s Sequestr solution adds a smaller enclosure
on the side of the main enclosure (Figure 2), which
well focuses on keeping workers outside the arc flash
isolates power to the smaller enclosure so that work-
boundary. SecureConnect removes the voltage from
ers don’t have to shut the whole system down.
the MCC without having to open the door or go inside
Besides arc mitigation, manufacturers of low-volt-
the arc flash boundary. “On every MCC unit, there’s a
age motor control centers (MCCs) have introduced arc-
connection that’s made on the backside of a vertical
resistant equipment, which addresses what happens
unit that gives it its power,” Tompkins explains. “With-
if an arc flash occurs when the doors are closed and
out having to open the door, this allows the customer
latched. “An arc flash is more likely if people are work-
to disconnect the power from the vertical bus.” A re-
ing with an open door and the system is energized,
mote operator station attaches to the center of the door
adding potential for human error,” says Pablo Medina,
and allows a worker to perform tasks from 30 ft away.
The range of solutions—whether mitigating or
product manager for the tiastar MCC at Siemens
Industry (www.industry.siemens.com). “Arc-resistant
resisting arc flashes—are geared not only toward
gear will not protect you from that because it will only
keeping workers and equipment safe, but also improv-
work when the door is closed. But what people tend to
ing productivity. “If implemented properly, you can
forget is that I can have the door open and something
achieve both,” Potvin says.
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JUST A FEW years ago, every controller vendor
factors, providing DIN-rail mounting capability.
touted its PLCs, and machine and robot builder
“Our ILC 100 class controllers feature an integrated
OEMs echoed the theme when discussing automa-
web server and function block libraries for IT-
tion features with their customers. But past affec-
friendly functionality,” notes Dan Fenton, control
tion for PLCs is now the love that dares not speak its
and software product marketing specialist at Phoe-
name—as controllers now are called programmable
nix Contact. Technologies borrowed from the PC
automation controllers (PACs), industrial PCs, or just
world such as SNMP and web-based HMIs further
about anything else except PLCs.
enhance connectivity and communications.
Changing names sometimes is just about market-
Dan Hebert
Rockwell Automation (www.rockwellautoma-
ing hype, but not in this instance. Virtually every
tion.com) didn’t invent the PLC, but it certainly
modern machine, robot or motion controller em-
was a leader in promoting its use in machine
ploys multiple technologies directly borrowed from
automation. But when it comes to making the
the commercial PC world. This makes the modern
term PLC verboten, it’s et tu Rockwell. “Our Con-
controllers more like PCs, and a lot less like PLCs.
trolLogix PAC enables a manufacturer to integrate
For a variety of reasons, chief among them in-
motion, safety, sequential, drive and process
stalled base, major U.S.-based vendors were among
control to provide a high-performance control so-
the last to relinquish proprietary PLC technology
lution,” says Mike Burrows, a director at Rockwell.
and move to the PC world. On the other hand, ven-
“One common Ethernet layer allows the integra-
dors based in Europe, particularly in Germany, were
tion of plant information with enterprise systems,
among the first to jump on the PC bandwagon.
using standard Cisco technology for security. The
“Beckhoff follows the technology migration set by
t
senior technical editor t dhebert@putman.net
TECHFLASH
Is PLC a Dirty Word Now?
Intel and adopts the latest processors for industrial
use. We offer industrial PCs that use second-gener-
CompactLogix controller gives machine builders
integrated motion on EtherNet/IP.”
Although larger U.S.-based PLC vendors were
relatively slow to jump on the PC train, smaller
Controllers now are called PACs,
industrial PCs, or just about
anything else except PLCs.
suppliers were onboard early. “Our SoftPLCs are
open-architecture PACs, running ladder logic as
their primary language, but also supporting C++,”
explains Cindy Hollenbeck, vice president of Soft-
ation Intel Core i3, Core i5 and Core i7 processors in
PLC (www.softplc.com). “SoftPLCs have advanced
a rugged plant floor-worthy housing,” says Graham
PAC features such as data logging, database
Harris, president of Beckhoff Automation (www.
interface, advanced math calculations, email/tex-
beckhoffautomation.com). “For machine builders
ting and other communications, and more. The
and robot builders, this adds functional layers in
SoftPLC runtime engine is a Linux-based kernel
software rather than via separate hardware boxes.”
that runs on an embedded computer such as an
When Wago (www.wago.us) describes its current controller offering, it does so using PC and IT
x86-, ARM- or PowerPC-based system.”
Opto 22 (www.opto22.com) has long cham-
terminology. “Our Ethernet 2.0 platform provides
pioned Ethernet-based I/O, along with other
modularity, scalability and high performance,”
technologies from the PC world such as task
notes Charlie Norz, product manager of I/O sys-
scheduling and distributed processing. “Unlike
tems for Wago. “Gen II of our Wago-I/O-System
with a PLC, individual tasks can be scheduled
Ethernet 2.0 packages those attributes with
and executed more logically with our Snap PAC
higher-performance processors into three distinct
and its flowchart-based control programs,” says
and compact programmable fieldbus controllers
Selam Shimelash, application engineer with Opto
(PFCs). For networking/control flexibility, OEMs
22. “If some of the machine I/O is less critical and
can choose features like SD card capability and
doesn’t need to be scanned as often, the control
network redundancy, and all our PFCs have a dual-
program can be designed and written that way.
port Ethernet switch to support daisy-chaining.”
The PAC won’t communicate with the I/O unless
Like Wago, Phoenix Contact (www.phoenixcontact.com) uses PC technology to greatly reduce form
38
Control Design March 2012
it needs to because the scanning of I/O points is a
task performed by the remote brains.”
controldesign.com
A Sense of the Market
WE CONDUCTED A STUDY in December 2011
ALL-PURPOSE SENSOR
to identify use and application trends for sensors
LR-Z Series all-purpose laser photoeye has a
and vision products among the industrial ma-
CMOS image sensor and laser power control
chine builders in our print and digital audience.
function for stable detection of targets with col-
No huge technological changes have shaken
or, angle, material and
surface fi nish varia-
first conducted this type of survey in 2008, and the
tions. The sensor has
pecking order of sensor popularity and selection is
an SUS316L stainless
largely unchanged. About 72% of respondents use
steel enclosure with
inductive proximity sensors, 64% use photoelectric
NEMA 4X, 6P and 13,
sensors, and a further 64% use process variable
and IP68/69K ratings.
sensors. Some 62% use rotary encoders/resolvers,
Operation is simplified
45% use capacitive proximity sensors, and a further
by a digital, seven-segment display and one-
45% use linear position indicators. About one-third
touch teaching technology.
of respondents said they also employ ultrasonic
Keyence; 888/539-3623; www.keyence.com/PRLRZ
cdroundup@putman.net
the world of sensors and machine vision since we
proximity, vibration and machine vision.
The use of point-to-point hardwiring to
connect sensors to I/O points seems to have
MORE THAN BLACK AND WHITE
stabilized around 57%, which is down from
DK12-11-IO contrast sensors detect differences
the 78% reported in 2009. About one in nine
in two colors of media,
respondents reported using device-level digital
with a three-color light
networks in 2011, down from 15% in 2010.
source. The sensors
Showing no significant change from 2010 were
are IO-Link compatible,
users of Ethernet (9%), proprietary (8%) and se-
include customizable and
rial (6%) networking solutions.
diagnostic LEDs, and can
Some 41% of 2011’s respondents reported
invert the output state
using machine vision-based sensing, up from
and disable the adjust-
36% in 2010. Of those, 46% reported using vision
ment potentiometer for tamperproof require-
for online inspection (down from 57% in 2010).
ments, and log the output.
Showing no significant change from 2010, 30%
Pepperl+Fuchs; 330/486-0001; www.pepperl-fuchs.us
used it as feedback for real-time machine control; 6% used it for offl ine inspection.
This time, 39% said they use all-in-one, inte-
FLOW MEASUREMENT
grated, smart cameras. Last year, 37% said that.
Cubemass Coriolis flowmeter measures mass
About 27% are using vendor-built systems with
flow, volumetric flow, temperature and density,
camera, frame grabber and processor (down from
and communicates to controllers via pulse, fre-
31%). That’s similar to prior studies.
quency, 4-20 mA with HART, and Modbus RS-485.
WIDE RANGE SENSING
¼ in. measure flow of a few
BOS 50K photoelectric sensors with
drops or 2,200 lb/hr with
glass lens and IP67 housing have
mass flow accuracy ±0.10%
2 m sensing range, background sup-
of reading, and repeat-
pression, and a red light emitter for
ability of 0.05% for liquids.
setup and adjustment. Some mod-
It measures density in
els include polarized retroreflective
liquids with accuracy to
with 18 m range, and a through-
±0.001 g/cc with repeat-
beam version with a 60 m range.
ability of 0.0005 g/cc.
Balluff; 800/543-8390; www.balluff.com/50k
Endress+Hauser; 317/535-1329; www.us.endress.com
Four pipe sizes from 1/24 to
controldesign.com
March 2012 Control Design
PRODUCT ROUNDUP
Machine Builders Remain Consistent With Sensor Choices
39
PRODUCT ROUNDUP
CURRENT SENSING
tion with one fixed response
AS1 Series compact case
time is needed. Protective
current-sensing switch
heights to nearly 2.5 m are avail-
monitors an energized
able with M12 connector pigtails
circuit in tight spaces.
or a pre-wired 3 m cable.
The ring design slips
Omron STI; 800/479-3658;
onto a conductor to reli-
www.sti.com
ably detect currents as low as 0.5 A with a single
conductor pass. Solid-state output provides a
nearly unlimited number of operations. It can
CLEAR AND PRESENT DETECTION
control ac or dc circuits to 120 V, with a maxi-
Q26 photoelectric clear object detection sen-
mum load capacity of 150 mA.
sors have a polarized retro coaxial design that
NK Technologies; 800/959-4014;
permits operation over a wide range of distances
with the reflector
www.nktechnologies.com
mounted as close as 5
mm for applications
READ INFRARED
with restricted spaces.
Pro 100 and Pro 200 Series multi-wavelength
It has an LO/DO switch
infrared temperature sensors use ESP algo-
to control the output
type, a single-turn
rithms to provide aim-and-read capabilities for
non-graybody materials
potentiometer to adjust detection sensitivity, and
that are not accurately
a Health Mode output for application monitoring.
measured by single- or
Banner Engineering; 888/373-6767;
dual-wavelength sensors.
www.bannerengineering.com
The sensors can be used
as a standalone transmitter with a choice of inputs, outputs and alarms.
NO CONTACT
For advanced capabilities, remote interface mod-
Q-track compact, non-contact inductive sensors
ules, PID controllers and PC software programs
have printed emitter and receiver coil systems.
are available.
The emitter coils are activated with a high-
Williamson; 978/369-9607; www.williamsonir.com
frequency ac field, and produce an inductive
RLC circuit with the positioning element. They
include current and voltage out-
THINK BIG, DETECT SMALL
puts, eliminating the need
BJ Series photoelectric
for two separate sensors.
sensors detect transparent
Turck; 800/544-7769;
objects and include re-
www.turck.us
verse polarity protection,
output short-circuit protection, and auto mutual
MAGNETIC SENSING
interference prevention
R-Series magnetic rotary angle sensors with an
function, and are opti-
embedded micro-
mized for sensing small objects. They include a
processor convert
setup sensing spot via a red LED.
magnetic orienta-
Autonics; 847/680-8160; www.autonics.com
tion to an analog
output repeatable
to 0.03% or 0.1° of measurement range. The sen-
SAFETY SIMPLY
sors have a measurement range up to 360° and
F3SJ-E safety light curtains have quick-mount
have 12- or 14-bit resolution.
brackets, reduced wiring and alignment indicators
Novotechnik U.S.; 508/485-2244;
for applications where simple on/off hand detec-
www.novotechnik.com
40
Control Design March 2012
controldesign.com
OBJECT OF MY DETECTION
ProSense digital pressure switch/transmitters
SA1E-X miniature photo sensors
for air, non-corrosive gas and non-flammable gas
for transparent or translucent
applications have a three-color LCD and provide
object detection offer an optimum
two digital outputs and
response speed of 500 μs, feature
one analog output. They
a coaxial optic and narrow beam
have three operation
to ensure stable detection, and are
modes and six pressure
not affected by angle, inclination or target shaking.
unit conversions, and
Objects as far as 2 m can be detected. NPN or PNP
two vacuum to pressure
outputs are available, as well as a choice of Dark ON
ranges (-14.5 to 14.5 psi and -14.5 to 145 psi).
or Light ON operation modes.
AutomationDirect; 770/889-2858;
IDEC; 800/262-4332; www.idec.com/usa
www.automationdirect.com
FLEXIBLE SENSOR
CHOOSE THE CLEAR
Worm flexible sensors bend
Ultrasonic clear label sensor with an OLED on-
around and through the en-
board display has a home screen and one-button
closure and are immune to
autoset (gap set), and is tweakable
external temperature effects
(momentary up/down adjustable).
even in a short thermowell.
It has M12 and M8 versions,
The temperature assembly
and 200 μs response.
keeps the spring-loaded sensor in place, and it
Tri-Tronics; 800/237-0946;
trims to lengths to handle thermowell assemblies,
www.ttco.com
transmitter head, hockey-puck connection head
and dual-sided enclosure. The sensors are available
with 100 and 1,000 Ω, platinum, copper and nickel
INDUCTIVE THINKING
RTDs, and J- and K-type thermocouples.
E2E two-wire dc inductive proximity sensors
Moore Industries; 818/894-7111; www.miinet.com
have a sensing range of
2-20 mm in shielded and
unshielded models with
SENSE THE POWER
short barrel or standard
OptoEMU Sensor is a web-enabled energy
lengths. They have solid
monitoring and data acquisition hard-
potted internal circuitry
ware appliance that lets commercial
to withstand shock, vibra-
and industrial customers acquire power
tion and severe environment locations.
consumption data from facility systems,
Omega Engineering; 203/359-1660; www.omega.com
machines, equipment and metering
devices in real time and with minimal
configuration.
HUMID NAVIGATION
Opto 22; 951/695-3010; www.opto22.com
LS5 Navigator is designed
to withstand -30 to 50 °C,
95% relative humidity, and
WELL-CONNECTED SENSOR
vibrations and shocks. It
Sensor-actuator cable has M12
has an optics system and is
connector with black polyamide
adaptable to different types of communication.
coupling nut, is corrosion-resis-
It works with AutoSurveyor, a software tool for
tant, and comes in 3-, 4- and 5-pole
determination of reflector coordinates, and is
configurations. Halogen-free PUR cable is available
available in an outdoor/indoor-use and an indoor-
in lengths 0.2–40 m and rated for IP67/IP68/IP69K.
use-only version.
Phoenix Contact; 717/944-1300;
Kollmorgen; 540/633-3545; www.kollmorgen.com
www.phoenixcontact.com
controldesign.com
March 2012 Control Design
41
PRODUCT ROUNDUP
HANDLES THE PRESSURE
PRODUCT ROUNDUP
DRY SENSING
mum, and will switch
Photoswitch 42CS inductive sensor has smooth
0.1 Adc with a carry cur-
or threaded 18 mm 316L stainless steel housing
rent rating of 0.5 A.
with a hard plastic lens for an operating range
Standex Electronics;
of -25 to 85 °C. Ferromagnetic teach feature
513/871-3777;
minimizes the possibility of water ingress as-
www.standex.com
sociated with pushbuttons or potentiometers. It
has polarized retroreflective, diffuse, transmitted beam, clear-object detection and background
INSENSITIVE TO COLOR
suppression sensing modes.
OADM 250 optical laser distance sensor detects
Rockwell Automation;
target objects, regardless of their surface prop-
440/646-3434;
erties or color at distance ranges of 0.2–4 m with
response times below 10 ms,
www.ab.com/sensors
1.2 mm resolution, and ±5
mm repeat accuracy, even
CUSTOM PRESSURE
on moving targets. It has an
Unik 5000 pressure sensing platform has a modular
aluminum housing, wash-
design to allow users to customize pressure mea-
able glass front optics, and
IP67 certification.
surement parameters. The sensors are available
with pressure ranges 1.5–10,000 psi. Three grades
Baumer; 860/620-6369; www.baumer.com
of performance—industrial, improved
and premium—offer
TEACH COLOR
accuracies 0.2–0.04%.
Series 4055 color
A choice of eight elec-
sensors have three
tronics boards provides
teachable color chan-
a variety of outputs.
nels with indepen-
GE Measurement & Control; 203/373-2211;
dent 200 mA outputs,
www.ge-mcs.com
which allow for three
color tones to be programmed. The teach process
provides five different tolerance levels, and color
SHAFT SENSOR
detection within the 30–40 mm operating range is
PST-360 shaft-
virtually independent of target distance.
angle, rotary
Contrinex; 866/289-2899; www.contrinex.com
position sensor
through-hole
design fits over existing shaft and bearing assem-
LEVEL VARIETY
blies. The sensor has a ring magnet with a fully
OEM series of level
sealed Hall ASIC as the sensor element. Standard
sensors have thermal
rotor has a 14.05 mm inside diameter shaft design
dispersion technol-
and custom configurations are available. It has
ogy with solid-state or
electrical angles to 360° with no dead band, and
relay contact outputs
linearity error as low as ±0.5%.
in a range of materials
Piher Int’l.; 224/475-0582; www.piher.net
independent of conductivity or dielectric constant, and resist a high degree of coating. Standard designs include two-wire, loop-powered;
MIGHTY, SMALL
insertion type with pigtail; level and tempera-
R12575 micro-proximity switch is 0.379 in. long
ture; mass level with two-wire, loop-powered;
with a 0.098 in. diameter. There is no power draw
integral type; high temperature; and wet/dry.
in the off state. It has a response time of 0.2 ms,
Fluid Components Int’l; 760/744-6950;
release time of 0.1 ms, a power rating of 3 VA maxi-
www.fluidcomponents.com
42
Control Design March 2012
controldesign.com
touch, to control precise dimensional product
E3Z photoelectric sensor family includes an ad-
parameters. They combine an AC-LVDT with a
vanced condition monitoring series, 30 m through-
linear ball bearing assembly to reduce radial play
beam models, oil-resistant series and stainless-
and core skewing for repeatability of 0.15 μm and
steel sensors. The E3Z dc sensor has a built-in
long life of 2x108 cycles.
amplifier with pulse synchronization. Intensive
Macro Sensors; 856/662-8000; www.macrosensors.com
shielding prevents malfunctions caused by inverter noise or wireless communications equipment.
The electronics are fully potted to resist dust and
POWERLINK INTERFACE
water spray to 1,200 psi. Stainless-steel E3ZM
Temposonics magne-
series is rated IP69K for 1,450 psi washdowns.
tostrictive linear-
Omron Electronics; 866/88-omron; www.omron247.com
position sensors
include the R-Series
Ethernet Powerlink sensor. Resolution of 1 μm
LIVE LONG AND PROBE
is possible for lengths 25–20,000 mm. Position
BBPM Series spring-
and velocity measurements can be provided for
loaded LVDT position
up to four locations on the sensor. For higher
sensors for use as
accuracy requirements, a linearity correction
dimensional gauging
option is available to improve the sensor’s non-
probes come in four
linearity specification within ±20 μm. Even bet-
models, including full
ter sensor accuracy (±10 μm) is available with a
bridge, half bridge,
proprietary magnet.
pneumatic and soft
MTS Systems; 919/677-0100; www.mtssensors.com
PRODUCT ROUNDUP
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WE HAVE A MIXED customer base with regard
to preferences for permanent magnet motors or
standard induction motors. Have induction motors reached the end of their efficiency improvement road? But we still periodically hear about
the potential for magnet material shortages. We’d
like to standardize where we can. Anyone else
having thoughts about the direction to take?
—From January ’12 Control Design
ANSWERS
KOLLMORGEN
RealAnswers@putman.net
REAL ANSWERS
How to Push Motor Efficiency
AC Motor Efficiency Improvement
Today’s ac premium efficient industrial and
commercial motors, which are typically
manufactured with premium-grade electrical
MAGNETIC ATTRACTION
steel, additional copper in the windings and
The neodymium iron boron (NeFeB) magnets found in most
permanent magnet motor designs offer high efficiency,
but manufacturers also use alternative rare-earth magnet
compounds that do not carry such a high price tag.
aluminum cast rotors, have reached a point of
diminishing returns. Higher efficiency levels are
possible, but incremental cost vs. energy savings makes a reasonable payback period much
more difficult to justify.
Copper cast rotors vs. conventional alumi-
cy and improvement in power factor can result in
smaller, more-compact motor designs. The hybrid
num cast rotors are an excellent next step to
electric vehicle is just one example for which
higher-efficiency induction motor designs.
ultra-efficient, lightweight and compact PM motor
Copper cast rotors are more expensive to
technology can be justified.
manufacture and currently are produced only
One thing seems certain: More efficient motors
in relatively low volume compared with their
will be in our future because the demand for
aluminum rotor counterparts. Higher-efficiency
electrical energy is going to continue to increase.
copper cast rotor designs are used today mainly
What technology will evolve as the next gen-
for specialty applications.
eration of ultra-efficient motor? Will they use a
Permanent magnet (PM) rotor designs also
copper rotor, PM rotor, a hybrid combination of
offer a significant potential for improved ef-
induction and PM suitable for sine-wave power,
ficiency. Most PM rotor motors are designed to
conventional induction designs upgraded using
run exclusively on adjustable-frequency power.
higher-grade electrical steels, or some other tech-
They also run at true synchronous speed with-
nology such as synchronous reluctance?
out slip and therefore are a synchronous-speed
machine. The high-performance neodymium
iron boron (NdFeB) magnets found in most PM
motors are relatively expensive.
Today China has exclusive control over the
NdFeB market, and has driven magnet cost to
unprecedented levels in the past year. New global
Higher efficiency levels are
possible, but incremental cost
vs. energy savings makes a
reasonable payback period
much more difficult to justify.
supply markets are emerging to produce these
magnets, but this will take time to significantly
The answer could lie in how the free market
influence the dominance that China has in the
responds to the need for more cost-effective
market. However, even with these high magnet
permanent magnets compared with the cost
costs, many specialty applications can benefit
of a high-volume copper rotor design. I highly
from the PM technology. The increase in efficien-
suspect that not one but a combination of these
44
Control Design March 2012
controldesign.com
Ferrite Alternative
application will ultimately dictate the technol-
Induction motors have been around for nearly
ogy solution that gets employed. The next gen-
100 years. Over the past two decades, a lot of
eration of ultra-efficient motors is likely to follow
serious effort has been focused on improving
the same progression as today’s energy-efficient
their efficiency. Today, these efforts are reach-
motors, which started with just a handful of
ing the point of rapidly diminishing returns.
end users concerned with energy saving and
Achieving higher efficiency with induction
evolved into federally mandated premium-effi-
motors will require either using more costly
ciency laws. In the end, it all will come down to
materials (e.g., substituting copper for alumi-
economics—motor cost for higher efficiency and
num in the rotor) or more total material. Either
energy savings based on the cost of energy.
of these costly options must be weighed against
RICHARD SCHAEFER, senior product manager,
Baldor Electric, www.baldor.com
the small additional improvement in efficiency
that would result.
Although most new permanent magnet motors
Rare-Earth Issues Temporary
rely on expensive rare-earth materials, a new
Permanent magnet motors still hold a significant
design achieves much higher levels with low-
efficiency and package-size advantage for motors
cost, readily available ferrite magnets. By using
under 3 kW. Both technologies have continued to
novel, conical air-gap geometry, this motor con-
progress, but for these smaller powered devices,
centrates the magnetic flux, achieving rare-earth
the PM solutions are still superior. The rare-earth
magnet motor performance at a cost competitive
magnet issues of late will be only a temporary
with induction motors.
supply issue. In addition, many manufacturers
The only significant drawbacks to this design
are using alternative materials to counteract the
are high rotor inertia, which actually can be
rare-earth supply issue.
an advantage in many applications, including
fans and pumps; and that PM motors require a
Samarium used in samarium cobalt
(SmCo) alloys does not suffer from as
high a price premium or availability
issue as neodymium, dysprosium and
terbium. SmCo offers performance
equal to certain grades of NdFe.
There is a wide variety of rare-earth magnet
variable-frequency drive to operate, making it
most easily justified in applications that already
require speed control.
JOHN PETRO, chief technology officer,
NovaTorque, www.novatorque.com
MAY’S PROBLEM
compounds, and not all experience severe price
SOME AUTOMATION VENDORS offer direct
and availability pressures. For example, sa-
access to machine HMIs and OITs with iPhone apps.
Apps are useful for personal purposes, particularly
for quick access to online info. We’re wondering if
app access for machine operator interface is better
than browser-based access through a smartphone, or
just a sexier marketing of the same capability.
marium used in samarium cobalt (SmCo) alloys
does not suffer from as high a price premium or
availability issue as neodymium, dysprosium
and terbium. SmCo offers performance equal to
certain grades of NdFe.
Additionally, ferrite magnet designs have been
used to avoid the rare-earth pricing challenge.
These motors, however, suffer 25%+ reduction
in output from the same size motor. In general,
they still would be superior to induction motors,
but as the motor’s horsepower grows into the 20
SEND US YOUR COMMENTS, SUGGESTIONS OR
SOLUTIONS FOR THIS PROBLEM. We’ll include it in
the May ’12 issue, and post it on ControlDesign.com.
Send visuals if you’d like—a sketch is fine. Email us
at RealAnswers@putman.net. Please include your
company, location and title in the response.
hp range, the induction motor closes the gap on
performance significantly.
TOM ENGLAND, director, global product planning,
HAVE A PROBLEM YOU’D LIKE TO POSE to the
readers? Send it along, too.
Kollmorgen, www.kollmorgen.com
controldesign.com
March 2012 Control Design
45
REAL ANSWERS
technologies will evolve and that the customer’s
EXCLUSIVE
OI Consolidates PLC, I/O, Wiring
TRADITIONALLY, IF YOU
designed a machine with a
PLC from one manufacturer,
you’d have to use the software
from that manufacturer. If a
customer specified a different
PLC brand, you’d be stuck making a software switch, too. But
Controller Development System
(CoDeSys) software, an IEC
61131-3 development system for
controller applications, now is
used by more than 300 suppliers to program their automation
FOR MORE INFORMATION
components, making it easier
Call 414/449-6555, email richardcharwell@eaton.com, or browse to
www.eaton.com.
for machine OEMs and users to
swap out devices as needed.
Eaton has programmed
What sets the latest version
mation. “You’re not just saving
devices with CoDeSys in Europe
apart from its European prede-
the components and spend-
for close to a decade. Now
cessors is that the series also
ing less, but also reducing the
that the software has gained
integrates directly with the
amount of time you spend in
momentum elsewhere, the
Eaton SmartWire-DT system,
commissioning,” Harwell says.
company is releasing its XV
which replaces control com-
“It saves configuration time
Series of operator interface and
ponent wiring with a single
and administration time, while
CoDeSys into the North Ameri-
cable, enabling more compact,
providing remote access and
can market. The XV Series with
cleaner panel design. The
diagnostic information at the
CoDeSys removes the physical
SmartWire-DT panel wiring
device level.”
PLC, incorporates logic into
solution eliminates the need
The new XV Series has an
the OI, and provides a single
to cut wires to length and at-
optional integrated SmartWire-
software package for control
tach them as with traditional
DT master, which eliminates
and visualization. By using the
cabinets, instead snapping in
the need for a gateway. The
CoDeSys programming envi-
cleanly and quickly.
integrated SmartWire-DT option
ronment, the XV Series enables
The SmartWire-DT system
is available in the compact high-
OEMs to lower costs, program
also sets the XV Series apart
performance series with screen
their equipment faster and
from competing systems that
sizes ranging from 3.5 to 10.4 in.
simplify integration.
combine HMI and PLC, according
Additional communication op-
to Rich Harwell, advanced solu-
tions include RS-485, CANopen
alization and data management
tions and connectivity manager
and Profibus-DP/MPI.
tasks into a single device. “It’s a
for Eaton. “It becomes about
series of products that enable the
smart points. It makes that
programming software is IEC
end customer to make smaller,
combination all that much more
61131-3 compliant and used to
smarter machines and develop
powerful,” he says, explain-
program both the visualization
them faster,” says Amy Beaudry,
ing that I/O modules are also
and logic control in the XV Series.
product manager at Eaton. “The
eliminated from Eaton’s OI. “We
The SmartWire-DT system can
XV Series with CoDeSys enables
don’t put I/O into the integrated
also be configured with xSoft-
remote intelligence, eliminates
system; we remove it altogether
CoDeSys-2 so that the visualiza-
entire device levels and makes
if possible. The combination is
tion, logic and end devices are all
complex wiring unnecessary for
really unique.”
conveniently programmed with a
The OI combines control, visu-
smaller, smarter machines.”
46
Control Design March 2012
Eaton touts it as lean auto-
Eaton xSoft-CoDeSys-2
single software package.
controldesign.com
dynamic noise control, and
PS-RS25-5 convection-
an onboard EMI/RFI filter
cooled, ac/dc power
compliant with IEC 61800-3
supply for embedded
that minimizes interference
systems is a 25 W unit
of surrounding equipment.
capable of 5 Vdc at 5 A. The 50
Yaskawa; 800/yaskawa;
W PS-RS50-5 supplies 5 Vdc at 10 A. The outputs
www.yaskawa.com
have short-circuit and overvoltage protection
with automatic recovery. Both devices accept
88–264 Vac input at 47–63 Hz, and operate from
SIL 2 SIGNALING
-20 to 70 °C without a fan.
Audible and visual signaling devices are designed
WinSystems; 817/274-7553; www.winsystems.com
with statistical-data-supporting conformity to
SIL 1 and SIL 2 safety requirements, and have self-monitoring circuitry and fault-indicat-
UL DIN-rail surge-protective device (SPD) with
ing contact closures to alert of
color coding has finger-safe construction, and a
failure or initiate shutdown/
rejection feature assures system integrity by pre-
lock-out of machinery.
venting misapplication of SPD modules. Vibration
Pfannenberg; 716/685-6866;
and shock resistance according to EN 60068-2
www.pfannenbergusa.com
are ideal for harsher conditions. Users can rely
on easyID local visual indication and optional
remote contact signaling to monitor module sta-
DISCRETE CONNECTIONS
tus. They are available with short-circuit current
EtherNet/IP I/O modules
ratings (SCCR) up to 200 kA.
for discrete devices have 16
Cooper Bussmann; 636/527-3877;
digital I/O channels with
www.cooperbussmann.com/surge
universal input/output or
input functionality. They
are available with 16 universal user-selectable digi-
SAFE UNDER PRESSURE
tal inputs/outputs or 16 dedicated inputs. The loca-
PSSR-2 safety controller is for
tion of any faults for each I/O port is identified via
use with two conductor wire,
LED diagnostic indicators or via the network. The
pressure-sensitive safety prod-
modules support the ODVA Device-Level Ring (DLR)
ucts that incorporate an integral
standard enabling multi-port EtherNet/IP devices to
6.8 kΩ end-of-line resistor. It meets
operate in a ring or linear topology.
requirements of EN13849-1:2006 and is Category 3
Belden; 314/854-8000; www.belden.com
SIL 2 PLd level. It has a manual or auto reset function and operates from 24 Vdc. With a response
time of 13 ms, it is a safety relay with force
MORE FORCE
guided relays and two normally open (safety) and
ERD20 rod-style electric actua-
one normally closed (monitor) contacts.
tor has a larger-diameter ball
Tapeswitch; 800/234-8273; www.tapeswitch.com
screw and a stroke length to 24
in. to deliver forces to 500 lb. It
is stroke-configurable, and ac-
MINIMIZE INTERFERENCE
cepts a variety of NEMA and metric stepper and
Z1000 Variable Speed Drive for building automa-
servo motors. It can accommodate six different
tion applications through 500 hp has an LCD
sensing or switching choices: reed, solid-state
operator with Hand-Off-Auto functions. It has a
PNP (sourcing), solid-state NPN (sinking), nor-
built-in 5% line impedance to reduce input har-
mally open, flying leads or quick-disconnect.
monic distortion, a 5 kHz carrier frequency with
Tolomatic; 800/328-2174; www.tolomatic.com
controldesign.com
March 2012 Control Design
47
cdproducts@putman.net
SOLVE OVERVOLTAGE
PRODUCT SHOWCASE
EMBEDDED POWER
PRODUCT SHOWCASE
ALL FOUR QUADS
24 Vdc power and 10 A DPDT output contacts.
Escon 36/2 dc four-quad-
Mode and range select switches are located on
rant PWM servo controller
the side of the unit so that when panel-mount-
for dc motors to 72 W pro-
ed, they are not operator-accessible. A special
vides drift-free, dynamic
LED indicator provides a unique and effective
speed behavior, has con-
flashing method of cycle progress indication.
figurable digital and analog inputs and outputs,
Marsh Bellofram; 304/387-1200;
and can be run in various operating modes,
www.marshbellofram.com
including speed controller (closed loop), speed
controller (open loop) and current controller.
Maxon Motor; 508/677-0520;
FAULT DETECTOR
www.maxonmotorusa.com
CMPT Copperhead transmitter unit (CTU) 24/7
digital vibration and temperature measurement and transmission tool, for machinery fault
POWER OF THE ATOM
detection systems for fans, pumps, gearboxes
DIN-rail controller platforms Uno-1170A and Uno-
and electric motors, measures temperature and
1170AE have 1G DDR2 RAM, Intel Atom N270 pro-
analyzes three types of vibration signals. The
cessor, fanless design, compact size, energy-effi-
unit has special functions for low-speed ma-
cient power consumption, and operating range of
chinery, with an ability to monitor unbalance
-10 to 60 °C. They are equipped
and misalignment to 120 rpm, and bearing and
with two Ethernet ports, three
gearbox condition to 20 rpm. It transmits data via
serial ports (two RS-232 ports
4–20 mA or 0–10 Vdc or CANbus. A touchscreen
and one RS-232/422/485 port),
HMI for alarm display and logging is available.
three external USB 2.0 ports, 2.5
SKF; +44 (0) 7980 712881; www.skf.com
in. SATA bay, and one internal
secure USB port to support a USB
encryption dongle key.
STATE IS SOLID
Advantech Industrial Automation; 800/205-7940;
RG Series of ac and dc solid-
www.advantech.com/ea
state switching devices
are for switching resistive,
slightly inductive and motor
MOTION+PLC
loads, up to 85 AAC (15 hp)
A3200 MotionPAC is
switching, with nominal ratings at 40 ºC and high
a software-based PLC
SCCR rating of 100 kA. The devices are 17.5 mm
integrated with an A3200
wide, and are cUL listed, UL recognized and/or CSA
motion controller. It can
approved, VDE approved and CE certified.
be used independently for
Carlo Gavazzi; 847/465-6100; www.gavazzionline.com
full machine control or
with AeroBasic programs, and complies with IEC
61131-3 and PLCopen. Users can program in ladder
SCAN WITH TRIPLE CORE
diagrams (LDs), function block diagrams (FBDs) or
XG-8000 vision system
structured text (ST).
includes line scan camera
Aerotech; 412/963-7470; www.aerotech.com
models, a triple-core processor and multi-camera
connectivity of up to eight
DELAY RELAY
cameras. It has an integrated development envi-
405AR industrial timer fam-
ronment, toolset and user interface. Visual LED
ily with on-delay instanta-
indicators, built into the line scan cameras, dis-
neous relay functionality
play received light intensities and image sharp-
has 12 timing ranges and
ness to simplify setup process.
operates on 24–240 Vac or
Keyence; 888/539-3623; www.keyence.com/PRXG8
48
Control Design March 2012
controldesign.com
is the only magazine exclusively
dedicated to the original equipment
manufacturing (OEM) market for
instrumentation and controls—the
largest market for industrial controls.
SOFTWARE
RESOURCES
DATA FOR DECISIONS
RIGHT SIZING
FactoryTalk VantagePoint 4.0 software
Motioneering
includes enhanced connectors and precon-
Application
figured reporting content for Logix pro-
Engine 6.2.0
grammable automation controllers (PACs),
motion sys-
FactoryTalk His-
tem sizing
torian, Facto-
and selection
PUBLISHING TEAM
ryTalk Metrics
software has a mechanism project concept
GROUP PUBLISHER & VP, CONTENT
and FactoryTalk
to collect and save load information for
KEITH LARSON klarson@putman.net
EnergyMetrix,
multiple axes, automatically calculate
DIRECTOR OF CIRCULATION
to set up report-
application results, and compare them
JACK JONES jjones@putman.net
ing around common equipment types. Web-
against a database of company products
based dashboards monitor key performance
to identify the optimized linear or rotary
SALES TEAM
indicators (KPIs) in real time.
motion system solutions to meet specific
NORTHEASTERN AND MID-ATLANTIC REGIONAL MANAGER
Rockwell Automation; 440/646-3434;
machine builder application requirements.
DAVE FISHER dfisher@putman.net
www.rockwellautomation.com
Kollmorgen; 540/633-3545;
508/543-5172 Fax: 508/543-3061
www.kollmorgen.com
24 Cannon Forge Dr.
555 W. Pierce Rd., Suite 301
Itasca, Illinois 60143
630/467-1300
Fax: 630/467-1124
Foxboro, Massachusetts 02035
THIRD GEN
MIDWESTERN AND SOUTHERN REGIONAL MANAGER
GREG ZAMIN gzamin@putman.net
TwinCat 3 PC-based
GET SERVED
control software has
Brochure includes
object-oriented IEC
updates to the
61131-3 extensions, C
ProServe Design,
and C++. The integra-
Assembly and
LAURA MARTINEZ lmartinez@putman.net
tion of Matlab/Simu-
Marking suite of
310/607-0125 Fax: 310/607-0168
link facilitates a con-
free professional-
218 Virginia, Suite 4, El Segundo,
nection to scientific
grade software,
California 90245
fields. The software modules can run in dif-
and plotters/print-
DIGITAL SALES SPECIALIST
ferent languages within a common runtime,
ers that combine design and engineering
JEANNE FREEDLAND
and all widely used fieldbuses are supported.
tasks with company’s products to create
jfreedland@putman.net
The eXtended Automation Engineering envi-
assemblies. New version 6.0 software uses
ronment (XAE) in TwinCat 3 is essentially the
a SQL server database, and has expanded
Microsoft Visual Studio platform.
marking/design tools such as AutoSave
Beckhoff Automation; 952/890-0000;
and SAP export.
www.beckhoffautomation.com
Wago; 800/din-rail; www/wago.us
630/551-2500 Fax: 630/467-1124
555 W. Pierce Rd., Suite 301
Itasca, Illinois 60143
WESTERN REGIONAL MANAGER
805/773-4299 Fax: 805/773-0451
INSIDE SALES SPECIALIST
POLLY DICKSON pdickson@putman.net
630/467-1300 Fax: 630/467-1124
EXECUTIVE STAFF
PRESIDENT & CEO
JOHN M. CAPPELLETTI
AD INDEX
Adalet ......................................................................35
Allied Electronics ......................................................17
AutomationDirect ......................................................52
Autonics USA............................................................16
AVG Automation ..........................................................2
B&R Industrial Automation ..........................................8
Baldor Electric ..........................................................12
Beckhoff Automation ...................................................6
Bosch.......................................................................25
c3controls ................................................................10
Crenlo ......................................................................32
CSA International ......................................................19
Eaton .......................................................................18
Festo ........................................................................31
Harting .....................................................................29
VICE PRESIDENT
IDEC ........................................................................27
Lapp USA .................................................................28
Maple Systems..........................................................26
Measurement Computing ...........................................36
Molex .......................................................................20
National Instruments ...................................................4
Novotechnik ..............................................................34
Omega Engineering .....................................................3
Parker Hannifin .........................................................30
Patlite ......................................................................24
Schneider Electric .....................................................37
Siemens Industry ......................................................15
UBM Canon Communications .....................................43
Yaskawa Electric .......................................................51
JULIE CAPPELLETTI-LANGE
VP, CIRCULATION
JERRY CLARK
VP, CREATIVE SERVICES
STEVE HERNER
REPRINTS
FOSTER REPRINTS www.fosterprinting.com
JILL KALETHA
jillk@fosterprinting.com
866-879-9144 ext. 168
controldesign.com
March 2012 Control Design
49
METALWORKING OPERATIONS have an obligaCutting Tools ~4%
tion to develop sustainable manufacturing. Some
14%
Coolant
7%
Energy
might think this a bold statement. Although the
idea of sustainability is becoming better defined
10%
Personnel
40%
Equipment
22%
Disposal
and understood, many manufacturers still are not
taking the necessary steps to implement newer
proven technologies that foster sustainability.
One of those technologies is minimum quantity
Other Costs
lubrication (MQL), which eliminates large quantities of water- and oil-based coolants and replaces
them with a small quantity of lubricant mixed with
air. This air-oil stream is precisely metered and
Coolant ~8-16%
7%
delivered to the cutting tool’s edge. The philosophy
behind MQL is based on a simple principle—more
is not always better. Use only what’s needed for the
application, because enough is as good as a feast.
Manufacturers that apply MQL reap many sus-
COLD CASH
Investment and operating expenses of a typical
machining system using water-soluble coolant shows the
many aspects that go into coolant expenses.
tainable benefits. Their workers are safer, with both
short- and long-term benefits. Operators, skilled
mist-collection equipment. Operating wet equip-
tradesmen and engineers no longer are exposed to
ment produces increased and ongoing lifecycle
the toxicity, bacteria and fungus risks that come
costs in the form of energy consumption, chemical
with traditional wet machining. The small amount
maintenance, water makeup, disposal of used cutting fluids, then starting the cycle of waste/recovery
Our environment is cleaner because
there are no cutting fluids used that
require stringent disposal.
all over again by replenishing consumed fluids.
The figure illustrates the investment and operating expenses of a typical machining system producing a large volume of aluminum transmission
of oil used for MQL generally is based on vegetables
or esters, which are less harmful to humans. Metal
components for cars, with water soluble coolant.
So with all of these benefits, why don’t more
chips produced during MQL machining are nearly
manufacturers implement MQL technology? As an
dry and much cleaner than with conventional ap-
industry, why don’t we behave more responsibly to
proaches. Near-dry chips are easier to recycle and
implement sustainable manufacturing processes
more valuable as a recycled material.
and systems in our factories? Do we hide behind
Our environment is cleaner because there are
the myth that sustainability adds cost? In the case
no cutting fluids used that require stringent dis-
of MQL, we have proven sustainability pays for
posal—benefiting everyone and helping to change
itself. So again, why aren’t more manufacturers in-
the dirty perception of manufacturing. Oil and
sisting on MQL solutions? Is it fear of new technol-
other wastes present significant disposal impacts
ogy or the cultural change associated with it?
and implications to our environment. Although
These questions and others are a real challenge
legislation and regulation specify mitigation to
for our industry. Until we answer them and have
the environment, enforcement of this legislation
the courage to change our behavior, we cannot
is challenging, expensive and difficult.
embrace a new idea like sustainability. Without
Most manufacturers still associate sustainability
change, we might miss the next real technology
with higher costs. However, when we break down
opportunity to restore American manufacturing
the investment and operating expenses of wet
leadership—and no one can afford that.
manufacturing systems, one begins to understand
how much these conventional systems cost. Trans-
DOUG WATTS is CTO at MAG Americas (www.mag-ias.
ferring, recycling and pressurizing coolant results
com), Erlanger, Ky., which makes metal cutting and
in significant costs for coolant supply, filtration and
composites machines for the durable goods industry.
50
Control Design March 2012
controldesign.com
Other
MAG AMERICAS
%PVH8BUUTtEPVHXBUUT!NBHJBTDPN
OEM INSIGHT
Why Not Lubricate Less?
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interior and surface permanent magnet motors provides highly efficient, precision control with incredible
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A1000 provides a single robust solution, regardless of your application.
Looking for adaptability? Call Yaskawa today.
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for over 115,000 possible I/O points. The
convenient USB port on each remote slave
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and monitor from any
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auto-configures all I/O
hardware connected to
the system, including up to
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