48
1746sc I/O Module Installation Instructions
1746sc I/O Module Installation Instructions
For more information about Spectrum Controls’ Rockwell Automation compatible products, visit
our Web site at www.spectrumcontrols.com, email spectrum@spectrumcontrols.com or
contact your local distributor.
Catalog No.
Spectrum Controls 1746 I/O Module
Installation Instructions
Description
1746sc-NO8i
Eight Analog Output, Current Only
1746sc-NO8v
Eight Analog Outputs, Voltage Only
1746sc-CTR4
Four General Purpose 50kHz Counter or Turbine Flowmeter
1746sc-CTR8
Eight General Purpose 50kHz Counter or Turbine Flowmeter
1746sc-NI8u
Eight Universal Analog Inputs
1746sc-INI4vi
Four Isolated-Channel Analog Inputs, Each Current or Voltage Selectable
1746sc-INI4i
Four Isolated-Channel Analog Inputs Current Only
1746sc-INO4vi
Four Isolated-Channel Analog Outputs, Each Current or Voltage Selectable
1746sc-INO4i
Four Isolated-Channel Analog Outputs, Current Only
1746sc-IA8I
Eight Isolated-Circuit 100/120 Vac/dc Inputs
1746sc-IB8I
Eight Isolated-Circuit 24 Vdc Inputs
1746sc-IC8I
Eight Isolated-Circuit 48 Vdc Inputs
1746sc-IM8I
Eight Isolated-Circuit 200/240 Vac/dc Inputs
1746sc-OAP8I
Eight Isolated-Circuit 120/240 Vac Outputs
1771sc-IMI16
16 Isolated-Circuit 200/240 Vac/dc Inputs
1771sc-OMI16
16 Isolated-Circuit 120/240 Vac Triac Outputs, Each Fuse Protected
1771sc-IFE32
32 Single-Ended Analog Inputs or16 Differential, Current or Voltage
Corporate Headquarters
P.O. Box 5533 • Bellevue, WA 98006 USA • Tel: 425-746-9481 • Fax 425- 641-9473
Web site www.spectrumcontrols.com • Email spectrum@spectrumcontrols.com
©2000-2002 Spectrum Controls, Inc. All rights reserved. Specifications subject to change without notice.
Printed in the USA. Publication 0100081-05 Rev. G September 2002.
The Encompass logo, Allen-Bradley and SLC 500 are registered trademarks of Rockwell Automation.
Catalog Numbers
1746sc-INO4i/vi
1746sc-INI4i/vi
1746sc-OAP8I
1746sc-NI8u
1746sc-CTR4
1746sc-NO8I
1746sc-IA8I
1746sc-IB8I
1746sc-IC8I
1746sc-IM8I
1746sc-CTR8
1746sc-NO8v
Product manuals may be downloaded from
our Web site at www.spectrumcontrols.com.
1
2
1746sc I/O Module Installation Instructions
1746sc I/O Module Installation Instructions
47
Technical Support Contacts
For technical support, please contact the local support center below during normal business
hours or email applicationsupport@spectrumcontrols.com.
USA
United Kingdom
Australia
Brazil
Europe
440-646-6900
01908635230
1800 809 929 or 613 9899 0300 • email raapsupport@ra.rockwell.com
(55) 11 3618 8800
(49) 2104 960 333
46
1746sc I/O Module Installation Instructions
1746sc I/O Module Installation Instructions
3
Table of Contents
General Information .............................................................................. 4
Precautionary Warnings ....................................................................... 4
Steps for Success .................................................................................. 5
Technical Assistance ............................................................................. 5
1746sc-INO4i & 1746sc-INO4vi ............................................................. 7
1746sc-INI4i & 1746sc-INI4vi .............................................................. 12
1746sc-IA8I, 1746sc-IB8I, 1746sc-IC8I & 1746sc-IM8I ........................ 18
1746sc-OAP8I ....................................................................................... 25
1746sc-NI8u .......................................................................................... 29
1746sc-CTR4 /1746sc-CTR8 .................................................................. 37
1746sc-NO8i & 1746sc-NO8v ................................................................ 43
Technical Support Contacts............................................................47
4
1746sc I/O Module Installation Instructions
1746sc I/O Module Installation Instructions
General Information
This document is intended for experienced users. The information provided in this document
will allow you to configure, wire, and install your module. Please refer to your owner’s manual
for more comprehensive information about your module’s configuration and maintenance.
You may download your manual from our web site www.spectrumcontrols.com.
5. Control each channel’s signal level
Use Output Words 0-7 (address O:e.0 – O:e.7) to control the output signal level of each
channel. The output signal level is fixed for Class 1 mode and identical to that of the 1746NO4 module.
O:e.16
Channel 0
Your module is intended to only be used with Allen-Bradley SLC 500 systems.
O:e.17
Channel 1
Precautionary Warnings
O:e.22
Channel 6
O:e.23
Channel 7
O:e.24
Channel 0
O:e.25
Channel 1
O:e.30
Channel 6
O:e.31
Channel 7
Output Data
Parameter 1
CAUTION – Electrostatically Sensitive Components
Before handling the module, touch a grounded object to rid yourself of electrostatic charge
and wear an approved wrist strap-grounding device. Handle the module from the front, away
from the backplane connector. Do not touch backplane connector pins. Lastly, keep the
module in its static-shield container when not in use or during shipment.
Output Data
Parameter 2
This equipment is suitable for use in Class I, Division 2, Groups A, B, C and D or nonhazardous locations only.
For UL and cUL compliance, power and input/output (I/O) wiring must be in accordance with
Class I, Division 2, wiring methods [Article 501-4(b) of the National Electrical Code, NFPA
70] and the authority having jurisdiction.
CAUTION – Possible Equipment Operation
Before installing or removing your module, always disconnect power from the SLC 500
system and from any other source to the module (in other words, don’t “hot swap” your
module), and disconnect any devices wired to the module. Power, input and output (I/O)
wiring must be in accordance with Class I, Division 2 wiring methods (Article 501-4(b) of the
National Electrical Code, NFPA 70) and in accordance with the authority having jurisdiction
For 1746sc-NO8v: -10V to +10V = -32,768 to 32764
For 1746sc-NO8i: 0mA to 21mA = 0 to 32764
Refer to the operators manual for Class 3 range information.
6. Check each channel’s configuration and status
Use Input Words 0-7 (addresses I:e.0 – I:e.7) to check the configuration and status of each
channel. When a channel is disabled, its status word is set to 0.
15
Address
I:e.0
0
Channel 0 Input Status Word 1
...
...
Channel 7 Input Status Word 1
I:e.7
Peripheral equipment must be suitable for the location in which it is used.
11 10
9
8
7
6
5
4
3
2
1
0
0 = OK
1 = Open
0 = OK
1 = Reseting
Units
*000 = NO4 Comp. Mode
001 = Engineering Units
010 = Scaled for PID
011 = Prop. Counts
100 = User Defined
101 = Not Used
110 = Not Used
111 = Not Used
* Class 1 fixed settings
Channel Enable
0 = OK
1 = Failure
Not Used
24V Power
SLC Status
Channel Configuration Word
0 = OK
1 = Fatal Error
WARNING – This device is intended to only be used with the Allen-Bradley
SLC 500 systems.
13 12
Output Range
WARNING – EXPLOSION HAZARD – Do not disconnect equipment unless
power has been switched off or the area is known to be non-hazardous.
15 14
Current Loop
Address
I:e.x
Channel Status
WARNING – EXPLOSION HAZARD – Substitution of components may
impair suitability for class I, Division 2
Not Used
Bit settings in the status word
WARNING – EXPLOSION HAZARD – When in hazardous locations, turn
off power before replacing or wiring modules.
45
0 = Off
1 = On
*00 = +/- 10V or 0-21mA
01 = 1-5V or 4-20mA
10 = 0-5V or 0-20mA
11 = 0-10V
44
1746sc I/O Module Installation Instructions
1746sc I/O Module Installation Instructions
3. Wire your module
To wire your module, you need:
· a small, phillips-blade screwdriver
· Belden 8761 (shielded, twisted pair) cable or equivalent
Steps for Success
You do not need to remove the supplied 18-position terminal block from the module. If
however, you do remove the terminal block, use the write-on label to identify your module’s
location. Before wiring the terminal block, turn off the power, unscrew the two retaining
screws at the top and bottom of the terminal block, and carefully pry the terminal block
loose.
1. Determine the backplane power requirements.
2. Set your DIP switches or shunts, if applicable.
3. Wire your module.
4. Assign your module to a slot.
5. Configure each channel.
6. Set limits, scale if applicable.
7. Monitor each channel’s data.
8. Check each channel’s configuration and status.
Before removing the terminal block, take time to plan your system:
· Ensure that the SLC 500 system is properly grounded and installed in a NEMA-rated enclosure.
· Turn off the power.
· Route the field wiring away from other wiring and as far as possible from sources of electrical
noise, such as motors, transformers, contactors, and AC devices.
· Route the field wiring in grounded conduit if possible.
· Ensure that the field wiring crosses AC or power cables at a right angle.
Wire field devices to your module as shown in the following wiring diagrams, using a
maximum wire size of 14 AWG and a maximum of two wires per terminal. The recommended
terminal screw torque is 7 to 9 in.-lb.
V Out 0
ANL COM 0
V Out 1
ANL COM 1
Installation of your module requires careful attention to insure proper operation. Refer to
the section for your specific module for details. The basic installation will proceed as follows:
Technical Assistance
If you need technical assistance, please review the troubleshooting information in AllenBradley’s system-level Installation and Operation Manual. For additional support, please see
page 47 of this guide for a list of local telephone technical support centers.
Except for the 8 replaceable fuses (1 for each output) on the 1746sc-OAP8I, modules
contain no user-serviceable parts, and if necessary, should be returned to Spectrum Controls
for repair.
Note that your module contains electronic components, which are susceptible to damage
from electrostatic discharge (ESD). An electrostatic charge can accumulate on the surface of
ordinary plastic wrapping or cushioning material.
V Out 2
ANL COM 2
V Out 3
ANL COM 3
V Out 4
ANL COM 4
V Out5
ANL COM 5
V Out 6
ANL COM 6
V Out 7
ANL COM 7
+24 VDC
DC COM
1746sc-NO8v
I Out 0
ANL COM 0
I Out 1
ANL COM 1
In the unlikely event that the module should need to be returned to Spectrum Controls,
complete and submit a returned material authorization form located on our Web site at
www.spectrumcontrols.com/psrr.htm. When shipping the product, ensure that the unit is
enclosed in approved ESD packaging (such as static-shielding/metallized bag or black
conductive container). Include your Spectrum Controls’ RMA number with the
product. Spectrum Controls reserves the right to void the warranty on any unit that is
improperly packaged for shipment.
For additional information or assistance, please contact your local telephone technical
support center. Contact information is located on page 47 of this guide.
I Out 2
ANL COM 2
I Out 3
ANL COM 3
I Out 4
ANL COM 4
I Out5
ANL COM 5
I Out 6
ANL COM 6
I Out 7
ANL COM 7
+24 VDC
DC COM
1746sc-NO8i
4. Assign your module to a slot
When assigning your module to a slot, select the module from the displayed list. If your
module is not listed, select OTHER at the bottom of the list and enter your module’s ID code
at the prompt.
Catalog Number
1746sc-NO8i
1746sc-NO8v
Module ID Code
Class 1
3527
3528
Class 3
12727 (16 Inputs, 32 Outputs)
12728 (16 Inputs, 32 Outputs)
5
All Spectrum Controls manuals are available in Portable Document Format (PDF) on our
Web site at www.spectrumcontrols.com.
6
1746sc I/O Module Installation Instructions
1746sc I/O Module Installation Instructions
43
1746sc-NO8i & 1746sc-NO8v
The module will operate in Class 1 or Class 3 mode. This section describes how to configure
the module for Class 1 operation. Class 1 provides basic data output with no user scaling. No
configuration is required. This mode is compatible with the 1746-NO4 module.
Class 3 allows you to select units, ramping, clamping limit, alarming, safe state
options and alarm latching. For more information regarding these features,
refer to the operators manual which may be found on our Web site,
www.spectrumcontrols.com.
1. Backplane power requirements
Use the table below to calculate the total load on the system power supply. For more
information, see the Allen-Bradley System Installation and Operation Manual.
Catalog Number 5 Vdc
24V
w/o ext. supply
w/ ext. supply*
1746sc-NO8i
120mA
250 mA
0 mA
1746sc-NO8v
120 mA
160 mA
0 mA
* The 1746sc-NO8i and 1746sc-NO8v output modules can be connected to an external 24
Vdc, N.E.C. Class 2 power supply to reduce backplane loading.
2. Set the module’s external power jumper JP4
Jumper JP4, is located in the bottom corner of the module’s large circuit board near the
power supply.
!
WARNING: Module is ESD sensitive. Handle accordingly.
NOTE: When using the External Power Feature, the external power and SLC power must be
turned on simultaneously.
· With the jumper in the 1-2 position, the module draws all its power from the backplane of
the SLC system.
1
2
3
· With the jumper in the 2-3 position, the module draws its 24 Vdc power from an external
power source; however, the module still draws its 5 Vdc power from the backplane.
1
2
3
1746sc I/O Module Installation Instructions
1746sc I/O Module Installation Instructions
Address
I:e.3
1. Backplane power requirements
Use the table below to calculate the total load on the system power supply. For more
information, see the Allen-Bradley System Installation and Operation Manual.
0
15
Channel 0 Status Word
Counter Enable
Counter Output State
0 = Start
1 = Stop
0 = On
1 = Off
0= OK
1= Error
0 = Zero
1 = Set
0 = Zero
1 = Set
0 = 65 K
1 = 8 Meg
0 = Reset
1 = Set
0 = Reset
1 = Set
0 = Reset
1 = Set
0 = Reset
1 = Set
w/o ext. supply
w/ ext. supply
1746sc-INO4i
120 mA
250 mA
0 mA
1746sc-INO4vi
120 mA
250 mA
0 mA
2. Set the module’s DIP switch
The switch, SW1, is located in the bottom corner of the module’s large circuit board.
0 = OK
1 = Error
0 = Reset
1 = Set
5 Vdc
* The 1746sc-INO4i and 1746sc-INO4vi output modules can be connected to an external 24
Vdc power supply to reduce backplane loading.
Direction
Channel 7 Status Word
CTR8
Count Direction
I:e.31
Catalog Number
CTR4
Count Max
Channel 6 Status Word
24 Vdc *
Count Size
I:e.27
Count Limit
Channel 5 Status Word
Count Preset
I:e.23
Count Zero
Channel 4 Status Word
Frequency Max
I:e.19
Frequency Zero
Channel 3 Status Word
Frequency Limit
I:e.15
Scale / F Factor
Channel 2 Status Word
K Factor / M Factor
I:e.11
System Error
Channel 1 Status Word
Configuration Error
I:e.7
7
1746sc-INO4i & 1746sc-INO4vi
8. Check each channel’s configuration and status
The status word is shown below.
0 = Reset
1 = Set
0 = Reset
1 = Set
0 = Up
1 = Down
0 = Normal
1 = Invert
RACK
SW1
42
EXT
WARNING: Module is ESD sensitive.
Handle accordingly.
NOTE: When using the External Power Feature, the external power and SLC power must be
turned on simultaneously.
· With the switch in the RACK position, the module draws all its power from the backplane
of the SLC system.
· With the switch in the EXT position, the module draws its 24 Vdc power from an external
power source; however, the module still draws its 5 Vdc power from the backplane.
Although your module has a jumper on its printed circuit board, this jumper is for the
manufacturer’s use only.
3. Wire your module
To wire your module, you need:
· a small, flat-blade screwdriver
· Belden 8761 (shielded, twisted pair) cable or equivalent
You do not need to remove the supplied 16-position terminal block from the module. If
however, you do remove the terminal block, use the write-on label to identify your module’s
location.
Before wiring the terminal block, turn off the power, unscrew the two retaining screws at the
top and bottom of the terminal block, and carefully pry the terminal block loose.
Before removing the terminal block, take time to plan your system:
· Ensure that the SLC 500 system is properly grounded and installed in a NEMA-rated
enclosure.
8
1746sc I/O Module Installation Instructions
1746sc I/O Module Installation Instructions
· Turn off the power.
· Route the field wiring away from other wiring and as far as possible from sources of
electrical noise, such as motors, transformers, contactors and AC devices.
· Route the field wiring in grounded conduit if possible.
· Ensure that the field wiring crosses AC or power cables at a right angle.
For CE compliance, Ferrite EMI Suppressors are needed on each channel’s terminal block
connection. Apply the suppressor close to the module terminal block. A Steward Part
2882024-0A0 or equivalent is recommended.
-INO4vi
Voltage output, ch. 0
0
Current output, ch. 0
1
Analog ground, ch. 0
2
Chassis ground
3
Voltage output, ch. 1
4
Current output, ch. 1
5
Analog ground, ch. 1
6
Voltage output, ch. 2
7
Current output, ch. 2
8
Analog ground, ch. 2
9
Chassis ground
10
Voltage output, ch. 3
11
Current output, ch. 3
12
Analog ground, ch. 3
13
+24 Vdc external
14
Ground external
15
Current
+
load
+
Voltage
load
-
Shielded, twisted-pair cable with shield
connected to ground only at one end
To guard against electrostatic damage
and improve module grounding,
connect a chassis ground pin directly
to a rack mounting bolt.
Ext. pwr.
supply
24 Vdc power supply if
external power is selected.
-INO4i
Not used
0
Current output, ch. 0
1
Analog ground, ch. 0
2
Chassis ground
3
Not used
4
Current output, ch. 1
5
Analog ground, ch. 1
6
Not used
7
Current output, ch. 2
8
Analog ground, ch. 2
9
Chassis ground
10
Not used
11
Current output, ch. 3
12
Analog ground, ch. 3
13
+24 Vdc external
14
Ground external
15
Current
+
load
-
Current
+
load
-
Shielded, twisted-pair cable with shield
connected to ground only at one end
To guard against electrostatic damage
and improve module grounding,
connect a chassis ground pin directly
to a rack mounting bolt.
Ext. pwr.
supply
24 Vdc power supply if
external power is selected.
41
7. Monitor each channel’s data
Each channel has three associated data words and one status word. Counter data is provided in
two forms, count and rate. The count data is the combintation of word 1 (MSW) and 2
(LSW). Frequency data is word 3. When the Instant/Average configuration bit is set to 0, the
rate data is based on a single count trigger. When set in Average mode, the rate value is a 1
second average of count data.
Address
I:e.0
0
15
Channel 0 MSW
CH 0 Counter Output MSW
I:e.1
Channel 0 LSW
CH 0 Counter Output LSW
I:e.2
Channel 0 Freq
CH 0 Frequency
I:e.3
Channel 0 Status
CH 0 Status
I:e.4
Channel 1 MSW
CH 1 Counter Output MSW
I:e.5
Channel 1 LSW
CH 1 Counter Output LSW
CH 1 Frequency
I:e.6
Channel 1 Freq
I:e.7
.
.
.
Channel 1 Status
I:e.28
Channel 7 MSW
CH 7 Counter Output MSW
I:e.29
Channel 7 LSW
CH 7 Counter Output LSW
I:e.30
Channel 7 Freq
CH 7 Frequency
I:e.31
Channel 7 Status
.
.
.
CH 1 Status
CH 7 Status
1746sc I/O Module Installation Instructions
1746sc I/O Module Installation Instructions
O:e.5
1 = Hold last value (0 = reset) on fault
6. Set limits, scale if applicable
A counter preset may be input to define the counter start point. The limit field may be used
to flag a high or low point in the count cycle. The frequency limit may be used to flag a
particular frequency value and toggle a status bit. The scale factor may be used to convert
frequency data into Engineering Units. The scale and preset/limit configuration bits must be
set before the values are stored. Refer to your user manual for more information regarding
these functions.
Address
O:e.x
0
15
Counter Preset / M Factor
O:e.y
Counter Limit / K Factor
O:e.z
Rate Limit / R Factor
0
15
Channel 1 Configuration Byte
Channel 0 Configuration Byte
Channel 3 Configuration Byte
Channel 2 Configuration Byte
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
= ±10 Vdc
= 1–5 Vdc
= 0–5 Vdc
= 0–10 Vdc
= 0–20 mA
= 4–20 mA
= 0–21 mA
= Invalid
= Engineering units
= Scaled for PID
= Proportional counts
= 1746-NO4 format
= Invalid
= Invalid
= User-defined scale
= Invalid
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
1 = Channel enable
Preset
Freq. Mode
Reset Flags
Counter Stop
Address
O:e.4
0 = Off
1 = On
Output range
0 = Off
1 = On
0 = Normal
1 = Reset
0 = Period
1 = Counter
Data format
0 = Up
1 = Down
00 = AC
01 = 5 V
10 = 12V
11 = 24V
5. Configure each channel
Use the low and high bytes in Output Words 4 and 5 (addresses O:e.4 and O:e.5) to configure
each channel.
0 = Off
1 = On
1 = Hold last value (0 = reset*) on fault
0 = Zero
1 = Preset
0 = 50kHz
1 = 30kHz
0 = Start
1 = Stop
1 = Channel enable
0 = Max
1 = Preset
Input Range
00 = UniDirect
01 = BiDirect
10 = Quad x1
11 = Quad x4
Catalog Number Module ID Code
1746sc-INO4i
3521
1746sc-INO4vi
3519
Output range
0 = Limit
1 = Scale
Count Mode
Stop on Zero
Filter
Stop in Limit
Count Size
Directrion
Roll over to
Scale / Limit Mode
Channel 0 Configuration Word
0 = +/- 32K
1 = +/- 8M
9
4. Assign your module to a slot
When assigning your module to a slot, select the module from the displayed list. If your
module is not listed, select OTHER at the bottom of the list and enter your module’s ID code
at the prompt.
0
15
Data format
Address
O:e.x
Roll under to
40
= ±10 Vdc
= 1–5 Vdc
= 0–5 Vdc
= 0–10 Vdc
= 0–20 mA
= 4–20 mA
= 0–21 mA
= Invalid
= Engineering units
= Scaled for PID
= Proportional counts
= 1746-NO4 format
= Invalid
= Invalid
= User-defined scale
= Invalid
* = Reset on Fault means the module outputs will go to zero (0) on a Rack Fault
6. Set output limits/user-defined scale (optional).
Use Output Words 6 and 7 (addresses O:e.6 and O:e.7) to set the low and high values of the
output data limits or user-defined scale (if user-defined scaling is desired). If you do not want
to use these features, set output words 6 and 7 to 0. Setting output words 6 and 7 to 0 disables
limiting and invalidates scaling.
Address
O:e.6
O:e.7
0
15
Low Value of Output Data Limit (or User-Defined Scale)
High Value of Output Data Limit (or User-Defined Scale)
10
1746sc I/O Module Installation Instructions
1746sc I/O Module Installation Instructions
You cannot use output data limiting with user-defined scaling.
Important – The values in output words 6 and 7 apply to all four channels. If you want to
use user-defined scaling or output data limiting, you must set all four channels to the same
data format.
5. Configure each channel
The input configuration word detailed below shows the configuration setup for a given
channel. Each channel has four associated words. Note the appropriate word address before
performing configuration.
7. Control each channel’s signal level
Use Output Words 0-3 (address O:e.0 – O:e.3) to control the output signal level of each
channel. The output signal level depends on the data format and output range selected.
Address
O:e.0
0
15
Channel 0 Output Data Word
O:e.1
Channel 1 Output Data Word
O:e.2
Channel 2 Output Data Word
O:e.3
Channel 3 Output Data Word
The following equations show how to convert between data value (counts) and signal level
(in mA or V):
S = {(D - Dlow ) x (∆S) ÷ (∆D)} + Slow
D = {(S - Slow) x (∆D)
where
S =
÷
(∆S)} + Dlow
signal level in mA or V)
Slow = minimum signal level (see Table 11 in Chapter 4)
Shigh = maximum signal level (see Table 11 in Chapter 4)
∆S = Shigh -Slow
Address
O:e.0
O:e.1
0
15
Channel 0 Configuration Word
Channel 0 Preset / M Factor
O:e.2
Channel 0 Limit / K Factor
O:e.3
Channel 0 Rate Limit / R Factor
O:e.4
Channel 1 Configuration Word
O:e.5
Channel 1 Preset / M Factor
O:e.6
Channel 1 Limit / K Factor
O:e.7
Channel 1 Rate Limit / R Factor
O:e.8
Channel 2 Configuration Word
O:e.9
Channel 2 Preset / M Factor
O:e.10
Channel 2 Limit / K Factor
O:e.11
Channel 2 Rate Limit / R Factor
O:e.12
Channel 3 Configuration Word
O:e.13
Channel 3 Preset / M Factor
O:e.14
Channel 3 Limit / K Factor
O:e.15
Channel 3 Rate Limit / R Factor
O:e.16
Channel 4 Configuration Word
O:e.17
Channel 4 Preset / M Factor
O:e.18
Channel 4 Limit / K Factor
O:e.19
Channel 4 Rate Limit / R Factor
Dlow = minimum data value (see Table 11 in Chapter 4)
O:e.20
Channel 5 Configuration Word
Dhigh = maximum data value (see Table 11 in Chapter 4)
O:e.21
Channel 5 Preset / M Factor
D =
data value (counts)
∆ D = Dhigh - Dlow
O:e.22
Channel 5 Limit / K Factor
O:e.23
Channel 5 Rate Limit / R Factor
O:e.24
Channel 6 Configuration Word
O:e.25
Channel 6 Preset / M Factor
O:e.26
Channel 6 Limit / K Factor
O:e.27
Channel 6 Rate Limit / R Factor
O:e.28
Channel 7 Configuration Word
O:e.29
Channel 7 Preset / M Factor
O:e.30
Channel 7 Limit / K Factor
O:e31
Channel 7 Rate Limit / R Factor
CTR4
CTR8
39
1746sc I/O Module Installation Instructions
1746sc I/O Module Installation Instructions
11
8. Monitor each channel’s data
Use Input Words 0-3 (addresses I:e.0 – I:e.3) to monitor the data received by your module
from the processor. When a channel is disabled, its data word is set to 0.
Module ID Code
1746sc-CTR4
1746sc-CTR-8
10200
10401
Note: The counter module supports Class III backplane communication. This module will not
work with the SCL5/01 processor. Please refer to your users manual for additional information regarding ladder programming and module configuration.
4. Set jumpers
Removing the onboard jumper JP2 activates the 15 KHz hardware input filter for channels
0-3. Removing the onboard jumper JP3 activates the 15 KHz hardware input filter for
channels 4-7 (CTR8 only). You may also select from two digital filters. Refer to your
operations manual for additional information.
Channel 2 Output Data Word
I:e.3
Channel 3 Output Data Word
9. Check each channel’s configuration and status
Use Input Words 4-7 (addresses I:e.4 – I:e.7) to check the configuration and status of each
channel. When a channel is disabled, its status word is set to 0.
0
15
I:e.6
Channel 2 Status Word
I:e.7
Channel 3 Status Word
the channel
Channel 1 Status Word
configuration byte.
I:e.5
the settings in
Channel 0 Status Word
Reflected Config Byte:
Bits 0–7 mirror
Address
I:e.4
1 = Output data limiting enabled
Catalog Number
I:e.2
1 = Over-limit error
3. Assign your module to a slot
When assigning your module to a slot, select the module from the displayed list. If your
module is not listed, select OTHER at the bottom of the list and enter your module’s ID code
at the prompt.
Channel 1 Output Data Word
1 = Operating temperature error
Note: Channels 4-7 are only available on the 1746sc-CTR8 module.
I:e.1
1 = Under-limit error
Quadrature Input
Channel 0 Output Data Word
1 = Over-range error
Input CH0
Common CH0
Input CH1
Common CH1
Counter Enable CH0/1
Frame Ground Shield for CH0/1
Input CH2
Common CH2
Input CH3
Common CH3
Count Enable CH2/3
Frame Ground Shield for CH2/3
Input CH4
Common CH4
Input CH5
Common CH5
Counter Enable Ch4/5
Frame Ground Shield for Ch4/5
Input CH6
Common Ch6
Input CH7
Common CH7
Count Enable CH7
Frame Ground Shield for CH6/7
0
15
1 = Under-range error
Standard Input
Address
I:e.0
1 = Fatal channel error
Terminal Block Pinouts
1 = Non-fatal channel error
38
12
1746sc I/O Module Installation Instructions
1746sc I/O Module Installation Instructions
1746sc-INI4i & 1746sc-INI4vi
1746sc-CTR4 / 1746sc-CTR8
1. Determine the backplane power requirements
Use the table below to calculate the total load on the system power supply. For more
information, see the Allen-Bradley System Installation and Operation Manual.
1. Determine the backplane power requirements
Use the table below to calculate the total load on the system power supply. For more
information, see the Allen-Bradley System Installation and Operation Manual.
Backplane Current Consumed
Backplane Current Consumed
Catalog Number
5 Vdc
24 Vdc
1746sc-INI4i
460 mA typical
0 mA
1746sc-INI4vi
570 mA typical
0 mA
5VDC
24VDC
CTR4
175mA
75mA
CTR8
225mA
125mA
2. Wire your module
To wire your module, you need:
· a small, flat-blade screwdriver
· Belden 8761 (shielded, twisted pair) cable or equivalent
2. Wire your module
To wire your module, you need:
· a small, flat-blade screwdriver
· Belden 8761 (shielded, twisted pair) cable or equivalent
You do not need to remove the supplied 16-position terminal block from the module. If
however, you do remove the terminal block, apply the supplied write-on label to the terminal
block, and use the write-on label to identify your module’s location.
You do not need to remove the supplied 16-position terminal block from the module. If
however, you do remove the terminal block, apply the supplied write-on label to the
terminal block, and use the write-on label to identify your module’s location.
Before wiring the terminal block, unscrew the two retaining screws at the top and bottom of
the terminal block and carefully pry the terminal block loose.
Before wiring the terminal block, unscrew the two retaining screws at the top and bottom of
the terminal block, and carefully pry the terminal block loose.
Before wiring the terminal block, take time to plan your system:
· Ensure that the SLC 500 system is properly grounded and installed in a NEMA-rated
enclosure.
· Ensure that the load resistance is <500ΩW for a current output channel and > 1 kΩW for a
voltage output channel.
· Route the field wiring away from other wiring and as far as possible from sources of
electrical noise, such as motors, transformers, contactors, and AC devices.
· Route the field wiring in grounded conduit if possible.
· Ensure that the field wiring crosses AC or power cables at a right angle.
Before wiring the terminal block, take time to plan your system:
· Ensure that the SLC 500 system is properly grounded and installed in a NEMA-rated
enclosure.
· Route the field wiring away from other wiring and as far as possible from sources of
electrical noise, such as motors, transformers, contactors, and AC devices.
· Route the field wiring in grounded conduit if possible.
· Ensure that the field wiring crosses AC or power cables at a right angle.
For CE compliance, Ferrite EMI Suppressors are needed on each channel’s terminal block
connection. Apply the suppressor close to the module terminal block. A Steward Part
2882024-0A0 or equivalent is recommended.
37
36
1746sc I/O Module Installation Instructions
1746sc I/O Module Installation Instructions
-INI4i
+
+
-
analog current
-
13
I IN 0 +
COM 0 SHIELD 0
SHIELD 1
+
+
-
analog current
-
I IN 1 +
COM 1 I IN 2 +
COM 2 -
Shielded, twisted-pair cable with shield
connected to ground only at one end
SHIELD 2
SHIELD 3
I IN 3 +
To guard against electrostatic damage
and improve chassis grounding,
connect one of the shield pins on the
terminal block to the rack.
-INI4vi
+
analog current
COM 3 -
+
-
-
V IN 0 +
I IN 0 +
COM 0 SHIELD 0
+
analog voltage
+
-
-
SHIELD 1
V IN 1 +
I IN 1 +
COM 1 V IN 2 +
I IN 2 +
COM 2 -
Shielded, twisted-pair cable with shield
connected to ground only at one end
SHIELD 2
SHIELD 3
V IN 3 +
To guard against electrostatic damage
and improve chassis grounding,
connect one of the shield pins on the
terminal block to the rack.
I IN 3 +
COM 3 -
3. Assign your module to a slot
When assigning your module to a slot, select the module from the displayed list. If your
module is not listed, select OTHER at the bottom of the list and enter your module’s ID code
at the prompt.
Catalog Number
1746sc-INI4i
1746sc-INI4vi
Module ID Code
3522
3520
1746sc I/O Module Installation Instructions
1746sc I/O Module Installation Instructions
4. Configure each channel
Use the low and high bytes in Configuration Words 0-3 (addresses O:e.0 – O:e.3) to configure
each channel.
0
15
Channel 0 Configuration Word
O:e.2
Channel 2 Configuration Word
I:e.0
Channel 0 Status Word
O:e.3
Channel 3 Configuration Word
I:e.1
Channel 1 Status Word
*
*
*
*
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
=
=
=
=
=
=
=
=
Engineering units
Scaled for PID
Proportional counts
1746-NI4 format
User-defined scale A
User-defined scale B
Invalid
Invalid
0
0
1
1
0
1
0
1
=
=
=
=
0
Low Value of User-Defined Scale A
O:e.5
High Value of User-Defined Scale A
O:e.6
Low Value of User-Defined Scale B
O:e.7
High Value of User-Defined Scale B
I:e.4
Channel 4 Status Word
Channel 5 Status Word
Channel 6 Status Word
I:e.7
Channel 7 Status Word
0
0
0
0
0
0 = Zero on open circuit
1 = Max. on open circuit
0
0 = Min. on open circuit
0
1 = Disabled
0
0
0 0 = Engr Units x1
0
0 1 = Engr Units x10
0
1 0 = Scaled for PID
0
1 1 = Proportional counts
0
0
0
0
1
1
Valid for channels 4-7 only.
1
For these input ranges, the open circuit response 1
does not apply and should be disabled.
1
1
1
1
1
1
1
1
1
1
1
1
0
0
1
1
*=
*** =
Data
Format
I:e.5
I:e.6
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
1 = Channel enable
I:e.3
10 Hz input filter
50 Hz input filter
60 Hz input filter
250 Hz input filter
5. Set limits, scale if applicable
Use Configuration Words 4-7 (addresses O:e.4 – O:e.7) to set the low and high values of the
user-defined scale (if user-defined scaling is desired). If you do not want to use these features,
set output words 4-7 to 0. Setting output words 4-7 to 0 disables scaling.
15
Channel 2 Status Word
Channel 3 Status Word
Open
Circuit
1 = Channel enable
±10 Vdc
1–5 Vdc
0–5 Vdc
0–10 Vdc
0–20 mA
4–20 mA
Invalid
Invalid
* = Applies only to 1-5V and 4-20 mA. Select INVALID for all other ranges.
Address
O:e.4
I:e.2
Channel
Filter Freq.
=
=
=
=
=
=
=
=
0
1 = Under-range error
0
1
0
1
0
1
0
1
15
1 = Open circuit error
0
0
1
1
0
0
1
1
0 = Channel disable
Input range
Data format
0
0
0
0
1
1
1
1
60 Hz
50 Hz
150 Hz
500 Hz
00 = Zero on open circuit
01= Max. on open circuit
10= Min. on open circuit
11= Invalid
Address
1 = Channel error
0=
1=
0=
1=
Open circuit response
1= Autocalibration enabled
0
0
1
1
Input filter frequency
Channel 1 Configuration Word
Unused (must set to 0)
O:e.1
Input
Type
Address
O:e.0
35
7. Check each channel’s configuration and status.
Use Input Words 0-7 (addresses I:e.0 – I:e.7) to check the configuration of each channel.
When a channel is disabled, its status word will be set to 0. To receive a channel status
word, bit 15 of the channel’s configuration word must be set to 0.
1 = Over range error
14
4 to 20 mA
0 to 20 mA**
± 0.05 V
± 0.10 V
± 0.50 V
± 2.0 V
0 to 5 V**
1 to 5 V**
0 to 10 V**
±10V**
Thermocouple Type J
Thermocouple Type K
Thermocouple Type T
Thermocouple Type E
Thermocouple Type R
Thermocouple Type S
Thermocouple Type B
Thermocouple Type N
RTD 100 W 385*
RTD 200 W Pt 385*
RTD 500 W Pt 385*
RTD 1000 W Pt 385*
RTD 100 W Pt 3916*
RTD 200 W Pt 3916*
RTD 500 W Pt 3916*
RTD 1000 W Pt 3916*
RTD 10 W Cu 426*
RTD 120 W Ni 618*
RTD 120 W Ni 672*
Resistance 3000 W*
Thermocouple Type C
CJC
34
1746sc I/O Module Installation Instructions
1746sc I/O Module Installation Instructions
6. Monitor each channel’s data
Use Input Words 0-7 (addresses I:e.0 – I:e.7) to monitor the data received by your module
from the processor. When a channel is disabled, its data word is set to 0. To receive a
channel (data word) bit 15 of the channel’s configuration word must be set to 1.
Address 15
15
6. Monitor each channel’s data
Use Input Words 0-3 (addresses I:e.0 – I:e.3) to monitor the data received by your module
from the input device. When a channel is disabled, its data word is set to 0.
Address 15
0
0
I:e.0
Channel 0 Data Word
I:e.0
Channel 0 Data Word
I:e.1
Channel 1 Data Word
I:e.1
Channel 1 Data Word
I:e.2
Channel 2 Data Word
I:e.2
Channel 2 Data Word
I:e.3
Channel 3 Data Word
I:e.4
Channel 4 Data Word
I:e.3
Channel 3 Data Word
I:e.5
Channel 5 Data Word
I:e.4
Channel 4 Data Word
I:e.6
Channel 6 Data Word
I:e.5
Channel 5 Data Word
I:e.7
Channel 7 Data Word
I:e.6
Channel 6 Data Word
I:e.7
Channel 7 Data Word
The following equations show you how to convert between data value (counts) and signal
level (in mA or V):
S = {(D - Dlow ) x (∆S) ÷ (∆D)} + Slow
D = {(S - Slow) x (∆D)
where
S =
÷
(∆S)} + Dlow
signal level in mA or V)
Slow = minimum signal level (see Table 11 in Chapter 4)
Shigh = maximum signal level (see Table 11 in Chapter 4)
∆S = Shigh -Slow
D =
data value (counts)
Dlow = minimum data value (see Table 11 in Chapter 4)
Dhigh = maximum data value (see Table 11 in Chapter 4)
∆ D = Dhigh - Dlow
1746sc I/O Module Installation Instructions
1746sc I/O Module Installation Instructions
7. Check each channel’s configuration and status
Use Input Words 4-7 (addresses I:e.4 – I:e.7) to check the configuration and status of each
channel. When a channel is disabled, its status word will be set to 0.
0
15
Channel 0 Status Word
I:e.7
Channel 3 Status Word
O:e.1
Channel 1 Configuration Word
O:e.2
Channel 2 Configuration Word
O:e.3
Channel 3 Configuration Word
O:e.4
Channel 4 Configuration Word
O:e.5
Channel 5 Configuration Word
O:e.6
Channel 6 Configuration Word
O:e.7
Channel 7 Configuration Word
0= Status word
1= Data word
0
0
0
0
0
0 0 = 10 Hz
0
0 1 = 50 Hz
0
1 0 = 60 Hz
0
1 1 = 250 Hz
0
0
0 = Degrees C
0
1 = Degrees F
0
0 0 = Zero on open circuit
0
0 1 = Max. on open circuit
0
1 0 = Min. on open circuit
0
1 1 = Disable
1
0 0 = Engineering units x 1 1
0 1 = Engineering units x10 1
1
1 0 = Scaled for PID
1
1 1 = Proportional counts
1
1
1
1
1
* = For channels 0-3, this bit must be zero
1
** = Option for channels 4-7 only, for channels 0-3 invalid. 1
*** = For these input ranges, the open circuit response
1
does not apply and should be disabled.
1
0 = 2 or 4 wire
1 = 3 wire
1 = Channel enable
Input range
Data format
Temperature units
Open circuit response
Channel filter frequency
Unused
0
*RTD Type
the channel
configuration byte.
the settings in
Bits 0-7 mirror
Address 15
Reflected Config Byte:
1 = Under-limit error
Channel 0 Configuration Word
1 = Operating temperature error
O:e.0
1 = Over-range error
Channel 2 Status Word
1 = Under-range error
I:e.6
1 = Fatal channel error
Channel 1 Status Word
1 = Non-fatal channel error
I:e.5
1 = Operating temperature error
Address
I:e.4
33
5. Configure each channel
Use the low and high bytes in Configuration Words 0-7 (addresses O:e.0 – O:e.7) to configure
each channel.
Input image word
16
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
1
1
1
0
0
1
1
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
x
0
1
1
0
1
0
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
x
x
0
1
= 4 to 20 mA
= 0 to 20 mA***
= ±0.05 V
= ± 0.50 V
= ± 2.0 V***
= 0 to 5 V***
= 1 to 5 V***
= 0 10 V***
= ± 10 V***
= Thermocouple Type J
= Thermocouple Type K
= Thermocouple Type T
= Thermocouple Type E
= Thermocouple Type R
= Thermocouple Type S
= Thermocouple Type B
= Thermocouple Type N
= RTD 100 W 385 Alpha**
= RTD 200 W 385 Alpha**
= RTD 500 W 385 Alpha**
= RTD 1000 W 385 Alpha**
= RTD 100 W 392 Alpha**
= RTD 200 W 392 Alpha**
= RTD 500 W 392 Alpha**
= RTD 1000 W 392 Alpha**
= Invalid
= Invalid
= Invalid
= CJC
32
1746sc I/O Module Installation Instructions
1746sc I/O Module Installation Instructions
BOTTOM ROW
CJC Sensors
CJC A+
THERMOCOUPLE, mA,
CJC A -
mV or V CABLE
CH2+
CH2Shield for CH2 and CH3
CH3+
CH3EXC6+
CH6+
CH6EXC6Shield for CH6 and CH7
EXC7+
CH7+
CH7EXC7-
4. Assign your module to a slot
When assigning your module to a slot, select the module from the displayed list. If your
module is not listed, select OTHER at the bottom of the list and enter your module’s ID code
at the prompt.
Catalog Number
Module ID Code
1746sc-NI8u
3500
17
18
1746sc I/O Module Installation Instructions
1746sc I/O Module Installation Instructions
1746sc-IA8I, 1746sc-IB8I, 746sc-IC8I & IM8I
1. Determine the backplane power requirements
Use the table below to calculate the total load on the system power supply. For more
information, see the Allen-Bradley System Installation and Operation Manual.
Backplane Power
All Modules
5Vdc
24Vdc
110mA
0mA
2. Wire your module
To wire field devices to your module, follow these steps:
1. Turn off power to the I/O chassis.
2. Optional: Remove the supplied 18-position terminal block from the module. To remove
the terminal block, unscrew the two retaining screws at the top and bottom of the terminal
block, and pull the terminal block loose.
3. Wire field devices to your module as shown in the following wiring diagrams, using a
maximum wire size of 14 AWG and a maximum of two wires per terminal. The recommended terminal screw torque is 7 to 9 in.-lb.
4. Install a wire tie in the slot below the terminal block and secure the wires.
CE Compliance Requirements
For installations requiring CE compliance, you must perform the following:
· Observe the grounding guidelines provided in Allen-Bradley’s SLC 500 Installation and
Operation Manual (Allen-Bradley publication 1747-NI002).
· Connect an E-GND terminal on the module directly to a rack-mounting bolt.
· Hard wire or permanently connect the PLC to the AC mains, or provide a pin and sleeve
(IEC 309) connector for connection to the AC mains.
This equipment is intended for use in over-voltage category II installations (see IEC 364-4443), where the rated mains supply voltage does not exceed 1000 Vac (50/60 Hz) or 1500
Vdc. If the input power is rated above these levels, ensure that your system is isolated from
the power main by an isolation transformer (or equivalent over-voltage protection device)
that has CE approval or approval from a European test agency.
For the 1746sc-IA8I, 1746sc-IM8I and 1746sc-OAP8I, you must also protect against
electrical shock by installing the I/O chassis in an enclosure with an IP20 to IP29 rating per
IEC 529. The enclosure should have warning labels (hazard symbol 417-IEC-5036) and/or a
mechanical disconnect to minimize the risk of accidental shock during maintenance. Use an
enclosure that can only be opened with a key or tool.
For CE compliance, Ferrite EMI Suppressors are needed on each channel’s terminal block
connection. Apply the suppressor close to the module terminal block. A Steward Part
2882024-0A0 or equivalent is recommended.
Before wiring the terminal block, take time to plan your system:
· Ensure that the SLC 500 system is properly grounded and installed in a NEMA-rated
enclosure.
· Ensure that the load resistance is <500 Ω for a current output channel and >1 kΩ for a
voltage output channel.
· Route the field wiring away from other wiring and as far as possible from sources of
electrical noise, such as motors, transformers, contactors and AC devices.
· Route the field wiring in grounded conduit if possible.
· Ensure that the field wiring crosses AC or power cables at a right angle.
For CE compliance, Ferrite EMI Suppressors are needed on each channel’s terminal block
connection. Apply the suppressor close to the module terminal block. A Steward Part
2882024-0A0 or equivalent is recommended.
TOP ROW
CH0+
THERMOCOUPLE, mA,
CH0-
mV or V CABLE
Shield for CH0 and CH1
CH1+
CH1EXC4+
4-WIRE RTD CABLE
CH4+
CH4EXC4Shield for CH4 and CH5
3-WIRE RTD CABLE
EXC5+
CH5+
CH5EXC5CJCB+
CJCBCJC Sensors
31
30
1746sc I/O Module Installation Instructions
1746sc I/O Module Installation Instructions
Current Input
Non-Current Input
1
2
Shunt in place
1746sc-IA8I On/Off-State Voltage Range
1
Shunt removed
2
JP11 Setup
Located in the bottom right hand corner, JP11 should always have pins 1 and 2 connected as
shown. This shunt is used during manufacturing of the module, and should never be moved by
the user.
JP11
1
0 Vac*
0 Vdc
30 Vac*
20 Vdc
Off-State
80 Vac*
85 Vdc
Input State Not Guaranteed
150 Vac*
170 Vdc
On-State
* Frequency = 47 to 63 Hz
1746sc-IA8I Simplified Circuit Diagram (one circuit shown)
2 3
VAC/VDC +
24.3 kW
249 W
0.33 µF
JP9, JP10 and JP12 Setup
The NI8u module supports up to four RTDs on channels 4 through 7. In order to properly
support RTD or resistance inputs, JP9, JP10 and JP12 have to be configured correctly. The
function of JP9 and JP10 is to define the input path for the channels 4 through 7. JP9 and
JP10 are four pin headers toward the right side of the board, looking at the primary side of
the board with the terminal block pointing up. JP12 is a three pin header on the very bottom
right hand corner, below JP11.
Setting for RTD or Resistance Inputs
The module will either support zero RTD or resistance inputs or four RTD or resistance
inputs in channels 4 through 7. To properly configure JP9 and JP10 for RTDs, set the shunts
across pins 2 and 3 of the four pin headers. JP12 also needs to have pins 2 and 3 connected
when RTDs or resistance inputs are to be used, as shown below.
1
2
3 4
JP9
JP10
1
2 3
24.3 kW
IN –
1746sc-IB8I On/Off-State Voltage Range
0 Vdc
4.5 Vdc
Off-State
11.5 Vdc
Input State Not Guaranteed
32 Vdc
On-State
1746sc-IB8I Simplified Circuit Diagram (one circuit shown)
VDC +
JP12
1.91 kW
3.16 kW
IN –
Setting for Non-RTD or Resistance Inputs
If RTDs are not to be used, and channels 4 through 7 are to be defined as thermocouple
inputs, current inputs, millivolt or voltage inputs, jumper pins 1 and 2 together, jumper pins
3 and 4 together, of JP9 and JP10, as defined below. JP12 also needs to have pins 1 and 2
connected when RTDs are not in use.
1 2
3 4
JP9
1.91 kW
1746sc-IC8I On/Off-State Voltage Range
0 Vdc
9.5 Vdc
Off-State
30 Vdc
Input State Not Guaranteed
JP10
1
2 3
JP12
3. Wire your module
To wire your module, you need:
· a small, flat-blade screwdriver
· Belden 8761 (shielded, twisted pair) cable or equivalent
You do not need to remove the supplied 16-position terminal block from the module. If
however, you do remove the terminal block, apply the supplied write-on label to the terminal
block, and use the write-on label to identify your module’s location.
Before wiring the terminal block, unscrew the two retaining screws at the top and bottom of
the terminal block, and carefully pry the terminal block loose.
1746sc-IC8I Simplified Circuit Diagram (one circuit shown)
VDC +
7.87 kW
6.65 kW
IN –
7.87 kW
60 Vdc
On-State
19
20
1746sc I/O Module Installation Instructions
1746sc I/O Module Installation Instructions
29
1746sc-NI8u
1746sc-IM8I On-Off-State Voltage Range
0 Vac*
0 Vdc
160 Vac*
170 Vdc
60 Vac*
40 Vdc
Off-State
264 Vac*
265 Vdc**
Input State Not Guaranteed
On-State
* Frequency = 47 to 63 Hz
1. Determine the backplane power requirements
Use the table below to calculate the total load on the system power supply. For more
information, see the Allen-Bradley System Installation and Operation Manual.
Backplane Current Consumed
** 276 Vdc short-term overload (1 hour)
1746sc-IM8I Simplified Circuit Diagram (one circuit shown)
499 W
VAC/VDC +
NI8U
0.15 µF
24VDC
120mA
100mA
49.9 kW
IN –
3. Assign your module to a slot
When assigning your module to a slot, select the module from the displayed list. If your
module is not listed, select OTHER at the bottom of the list and enter your module’s ID code
at the prompt.
Catalog Number
1746sc-IA8I
1746sc-IB8I
1746sc-IC8I
1746sc-IM8I
5VDC
49.9 kW
Module ID
303
324
324
304
2. Set your DIP switches or shunts, if applicable
The 1746sc-NI8u module is a multi-purpose, multi-functional module, which is capable of
supporting many different input types in a very small package. There are a few shunts on the
board that allow the user to define input paths properly, which are imperative for the
configuration control to allow proper utilization of the module. JP1 through JP8 supports the
current input mode options for each of the input channels, 0 through 7, respectively. In order
to define channels 4 through 7 for voltage or RTD inputs, JP9 and JP10, must be configured
properly. JP11 is used at the factory and should not be modified. JP12 indicates whether or
not RTDs are to be used in the configuration. The module is shipped with all current input
shunts in place, and the remaining shunts installed for non-RTD inputs. The shunts are to be
modified prior to installation of the module. Proper precautions for electrostatic handling
should be followed. Small needlenose pliers may be used to configure the shunts, if needed.
The following diagram shows the module outline defining the location of the various shunts,
looking at the primary side of the board, with the terminal block pointing up. A brief
description of each follows:
Terminal Block Header
4. Configure each channel
Terminal Block Header
1746sc-IA8I
Isolated-Circuit 100/120 V ac/dc Inputs (8)
VS0 L1 or +VDC
100/120 V ac/dc
VAC/VDC
0+
VS1 L1 or +VDC
VAC/VDC
1+
VS2 L1 or +VDC
VAC/VDC
2+
VS3 L1 or +VDC
VAC/VDC
3+
IN 0–
IN 1–
IN 2–
IN 3–
E-GND
E-GND
VS4 L1 or +VDC
VS5 L1 or +VDC
VAC/VDC
4+
VAC/VDC
5+
VS6 L1 or +VDC
VAC/VDC
6+
VS7 L1 or +VDC
VAC/VDC
7+
IN 4–
IN 5–
IN 6–
IN 7–
Alternative
input device
location
JP2
JP3
JP4
JP5
JP6
JP7
JP8
JP9
JP10
VS0 L2 or DC COM
VS1 L2 or DC COM 1
JP11
JP12
VS2 L2 or DC COM 2
VS3 L2 or DC COM 3
Rack mounting bolt
VS4 L2 or DC COM 4
VS5 L2 or DC COM 5
VS6 L2 or DC COM 6
VS7 L2 or DC COM 7
For IEC Type 1+ devices
that can't support 0.7 A
of inrush current, use an
external 500 W 1W
resistor on one input line
to reduce the inrush to
250 mA.
Note — The input circuits are electrically isolated from each other (the commons are NOT connected
internally). Therefore, up to eight different voltage sources (VS0–VS7) may be used.
Module ID Code = 303
JP1
JP1, JP2, JP3, JP4, JP5, JP6, JP7 and JP8 Setup
There are eight shunts corresponding to eight inputs, respectively, that exist to support the
0 to 20mA or 4 to 20mA current input selections. Each channel has an individual shunt (JP1Ch. 0, JP2 - Ch. 2 through JP8 - Ch. 7). These shunts are two pin headers that only need to
be connected if a channel is to be configured for current input. If the channel is to be used for
any other type (thermocouple, millivolt, voltage for channels 0 through 3 or thermocouple,
millivolt, voltage, RTD or resistance for channels 4 through 7), then the pins are to be left
open and unconnected.
28
1746sc I/O Module Installation Instructions
1746sc I/O Module Installation Instructions
1746sc-IB8I
Isolated-Circuit 24 Vdc Inputs (8)
VS0 +VDC
24 Vdc *
VDC
0+
VS1 +VDC
VDC
1+
VS2 +VDC
VDC
2+
VS3 +VDC
VDC
3+
IN 0–
IN 1–
IN 2–
IN 3–
E-GND
E-GND
VS4 +VDC
VDC
4+
VS5 +VDC
VDC
5+
VS6 +VDC
VDC
6+
VS7 +VDC
VDC
7+
IN 4–
IN 5–
IN 6–
IN 7–
Alternative
input device
location
VS0 DC COM
VS1 DC COM 1
VS2 DC COM 2
VS3 DC COM 3
Rack mounting bolt
VS4 DC COM 4
VS5 DC COM 5
VS6 DC COM 6
VS7 DC COM 7
Note — The input circuits are electrically isolated from each other (the commons are NOT connected
internally). Therefore, up to eight different voltage sources (VS0–VS7) may be used.
Module ID Code = 324
21
22
1746sc I/O Module Installation Instructions
1746sc I/O Module Installation Instructions
1746sc-IA8I
Isolated-Circuit 100/120 V ac/dc Inputs (8)
VS0 L1 or +VDC
100/120 V ac/dc
VAC/VDC
0+
VS1 L1 or +VDC
VAC/VDC
1+
VS2 L1 or +VDC
VAC/VDC
2+
VS3 L1 or +VDC
VAC/VDC
3+
IN 0–
IN 1–
IN 2–
IN 3–
E-GND
VS4 L1 or +VDC
VS5 L1 or +VDC
VAC/VDC
5+
VS6 L1 or +VDC
VAC/VDC
6+
VS7 L1 or +VDC
VAC/VDC
7+
You can verify that a fuse has opened by visually checking the fuses, shown below. Turn all
power off, and replace blown fuses with the specified replacement part only. Substitutes are
not acceptable.
VS0 L2 or DC COM
VS1 L2 or DC COM 1
Replaceable Fuses (F1–F8)
VS2 L2 or DC COM 2
3 A, 250 V, 2 AG SLO-BLO
Bussmann part C519-3A
VS3 L2 or DC COM 3
F1
IN 4–
IN 5–
IN 6–
IN 7–
Rack mounting bolt
F3
VS4 L2 or DC COM 4
VS5 L2 or DC COM 5
VS6 L2 or DC COM 6
VS7 L2 or DC COM 7
For IEC Type 1+ devices
that can't support 0.7 A
of inrush current, use an
external 500 W 1W
resistor on one input line
to reduce the inrush to
250 mA.
Note — The input circuits are electrically isolated from each other (the commons are NOT connected
internally). Therefore, up to eight different voltage sources (VS0–VS7) may be used.
Module ID Code = 303
6. Checking for blown fuses
If a fuse blows on the 1746sc-OAP8I, the following occurs:
1. The blown-fuse LED indicator illuminates (provided your module is receiving power from
the chassis).
2. The module indicates to the logic controller’s input image table which fuse has blown.
This allows for fuse monitoring and smart power-down sequencing of equipment after a
circuit failure.
F2
E-GND
VAC/VDC
4+
Alternative
input device
location
27
OAP8I
F4
F5
F6
F7
F8
26
1746sc I/O Module Installation Instructions
1746sc I/O Module Installation Instructions
1746sc-IM8I
Isolated-Circuit 200/240 V ac/dc Inputs (8)
1746sc-OAP8I
Isolated-Circuit 120/240 Vac Outputs (8)
VS0 L1 or +VDC
VS0 L1
Alternative
output device
location
VAC
0
VS1 L1
VAC
1
VS2 L1
VAC
2
VS3 L1
VAC
3
VAC/VDC
0+
OUT 0
VS0 L2
OUT 1
VS1 L2
OUT 2
VS2 L2
OUT 3
VS5 L1
VAC
5
VS6 L1
VAC
6
VS7 L1
VAC
7
VAC/VDC
1+
VS2 L1 or +VDC
VAC/VDC
2+
VS3 L1 or +VDC
VAC/VDC
3+
IN 0–
IN 1–
IN 2–
IN 3–
E-GND
E-GND
E-GND
VS4 L1
VS1 L1 or +VDC
VS3 L2
E-GND
VAC
4
200/240 V ac/dc
120/240 Vac
Rack mounting bolt
OUT 4
VS4 L2
OUT 5
OUT 6
OUT 7
VS4 L1 or +VDC
VAC/VDC
4+
VS5 L1 or +VDC
VAC/VDC
5+
VS5 L2
VS6 L1 or +VDC
VAC/VDC
6+
VS6 L2
VS7 L1 or +VDC
VAC/VDC
7+
IN 4–
IN 5–
IN 6–
IN 7–
Alternative
input device
location
VS0 L2 or DC COM
VS1 L2 or DC COM 1
VS2 L2 or DC COM 2
VS3 L2 or DC COM 3
Rack mounting bolt
VS4 L2 or DC COM 4
VS5 L2 or DC COM 5
VS6 L2 or DC COM 6
VS7 L2 or DC COM 7
VS7 L2
Note — The output circuits are electrically isolated from each other (the commons are NOT connected
internally). Therefore, up to eight different voltage sources (VS0–VS7) may be used.
For IEC Type 1+ devices
that can't support 0.7 A
of inrush current, use an
external 500 W 1W
resistor on one input line
to reduce the inrush to
250 mA.
Note — The input circuits are electrically isolated from each other (the commons are NOT connected
internally). Therefore, up to eight different voltage sources (VS0–VS7) may be used.
Module ID Code = 304
Module ID Code = 1905
5. Interpreting your module’s LED indicators
On the 1746sc-OAP8I, each status indicator (0-7) illuminates when the processor commands
the module to turn on the corresponding output. The indicators do not necessarily indicate
the presence or absence of AC power at an output. The Blown-Fuse indicator illuminates
when any 1 of the 8 outputs fuses blows and AC power is present.
1746sc-OAP8I
OUTPUT
5. Interpreting your module’s LED indicators
On the 1746sc-IA8I, 1746sc-IB8I, 1746sc-IC8I and 1746sc–IM8I, each status indicator
(0-7) illuminates when the proper signal is received at the corresponding input terminal.
1746sc-IA8I
INPUT
STATUS
1746sc-IB8I
INPUT
1746sc-IC8I
INPUT
STATUS
STATUS
ISOLATED 24V DC
ISOLATED 48V DC
1746sc-IM8I
INPUT
STATUS
STATUS
FUSE
ISOLATED TRIAC 120/240 VAC
ISOLATED 100/120V AC/DC
ISOLATED 200/240V AC/DC
23
24
1746sc I/O Module Installation Instructions
1746sc I/O Module Installation Instructions
25
1746sc-OAP8I
1. Determine the backplane power requirements
Use the table below to calculate the total load on the system power supply. For more
information, see the Allen-Bradley System Installation and Operation Manual.
Backplane Power
All Modules
5Vdc
24Vdc
110mA
0mA
2. Set your DIP Switches or shunts, if applicable
Not applicable.
3. Wire your module
For CE compliance, EMI Suppressors are needed on each channel’s terminal block connection. Apply the suppressor close to the module terminal block. A Steward Part 2882024-0A0
or equivalent is recommended.
1746sc-OAP8I Operating Voltage Range
0 Vac*
276 Vac*
74 Vac*
Operation Not Guaranteed
Recommended Operating Range
* Frequency = 47 to 63 Hz
1746sc-OAP8I Simplified Circuit Diagram (one circuit shown)
VAC
39 W
.01 µF
OUT
4. Assign your module to a slot
When assigning your module to a slot, select the module from the displayed list. If your
module is not listed, select OTHER at the bottom of the list and enter your module’s ID code
at the prompt.
Catalog Number
1746sc-OAP8I
Module ID
1905