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DEWE-EPAD modules
Technical reference manual
ISO9001
... the precision signal conditioning company
www.dewetr o n .c om
Copyright © DEWETRON elektronische Messgeraete Ges.m.b.H.
This document contains information which is protected by copyright. All rights are reserved. Reproduction,
adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws.
All trademarks and registered trademarks are acknowledged to be the property of their owners.
Technical Reference
Content
General Information, Safety Instructions
5
Warranty Information… ……………………………………………………………………… 5
Support………………………………………………………………………………………… 5
Printing History………………………………………………………………………………… 5
Safety symbols in the manual… …………………………………………………………… 6
Safety instructions for all DEWETRON systems… ……………………………………… 7
Environmental Considerations… …………………………………………………………… 8
General module information
9
Calibration information… …………………………………………………………………… 9
General module specifications… …………………………………………………………… 9
RS-232/485 interface………………………………………………………………………… 9
EPAD-BASE Module
11
Basic EPAD communication module… …………………………………………………… 11
Module specifications………………………………………………………………………… 11
LED state… …………………………………………………………………………………… 11
Connection… ………………………………………………………………………………… 11
EPAD-V8-P Module
13
8 channel voltage amplifier… ……………………………………………………………… 13
Module specifications………………………………………………………………………… 13
LED state… …………………………………………………………………………………… 13
Push button… ………………………………………………………………………………… 13
Connection… ………………………………………………………………………………… 14
Programming information… ………………………………………………………………… 14
EPAD-TH8-P-x Module
15
Module specifications………………………………………………………………………… 15
LED state… …………………………………………………………………………………… 15
Push button… ………………………………………………………………………………… 15
Connection… ………………………………………………………………………………… 15
Typical daisy-chain application……………………………………………………………… 16
Programming information… ………………………………………………………………… 16
DE-M0331E • DEWE-EPAD modules • Technical Reference Manual • Printing version 2.1.3 • September 04, 2008
3
Technical Reference
EPAD-TH8-P Module
17
8 channel thermocouple and RTD amplifier… …………………………………………… 17
Module specifications………………………………………………………………………… 17
LED state… …………………………………………………………………………………… 17
Push button… ………………………………………………………………………………… 17
Signal connection… ………………………………………………………………………… 18
Programming information… ………………………………………………………………… 18
EC-Certificate of conformity
4
C1
General Information, Safety Instructions
Notice
The information contained in this document is subject to change without notice.
DEWETRON elektronische Messgeraete Ges.m.b.H. (DEWETRON) shall not be liable for any errors
contained in this document. DEWETRON MAKES NO WARRANTIES OF ANY KIND WITH REGARD
TO THIS DOCUMENT, WHETHER EXPRESS OR IMPLIED. DEWETRON SPECIFICALLY DISCLAIMS
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
DEWETRON shall not be liable for any direct, indirect, special, incidental, or consequential damages,
whether based on contract, tort, or any other legal theory, in connection with the furnishing of this document
or the use of the information in this document.
Warranty Information
A copy of the specific warranty terms applicable to your DEWETRON product and replacement parts can be
obtained from your local sales and service office.
Support
For any support please contact your local distributor first or DEWETRON directly.
For Asia and Europe, please contact:
For the Americas, please contact:
DEWETRON Ges.m.b.H.
Parkring 4
A-8074 Graz-Grambach
AUSTRIA
Tel.: +43 316 3070
Fax: +43 316 307090
Email: support@dewetron.com
Web: http://www.dewetron.com
DEWETRON, Inc.
PO Box 1460
Charlestown, RI 02813
U.S.A.
Tel.:
+1 401 364 9464
Toll-free: +1 877 431 5166
Fax:
+1 401 364 8565
Email: support@dewamerica.com
Web:
http://www.dewamerica.com
The telephone hotline is available
Monday to Friday between
08:00 and 17:00 CET (GMT +1:00)
The telephone hotline is available
Monday to Friday between
08:00 and 17:00 GST (GMT -5:00)
Restricted Rights Legend
Use austrian law for duplication or disclosure.
DEWETRON GesmbH
Parkring 4
A-8074 Graz-Grambach / Austria
Printing History
Please refer to the page bottom for printing version.
Copyright © DEWETRON elektronische Messgeraete Ges.m.b.H.
This document contains information which is protected by copyright. All rights are reserved. Reproduction,
adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright
laws.
All trademarks and registered trademarks are acknowledged to be the property of their owners.
DE-M0331E • DEWE-EPAD modules • Technical Reference Manual • Printing version 2.1.3 • September 04, 2008
5
Safety instructions
Safety symbols in the manual
Indicates hazardous voltages.
WARNING
Calls attention to a procedure, practice, or condition that could cause bodily
injury or death.
CAUTION
Calls attention to a procedure, practice, or condition that could possibly cause
damage to equipment or permanent loss of data.
WARNINGS
The following general safety precautions must be observed during all phases of operation, service, and
repair of this product. Failure to comply with these precautions or with specific warnings elsewhere in this
manual violates safety standards of design, manufacture, and intended use of the product. DEWETRON
Elektronische Messgeraete Ges.m.b.H. assumes no liability for the customer’s failure to comply with these
requirements.
All accessories shown in this document are available as option
and will not be shipped as standard parts.
6
For safety reasons max. 50 V may be applied to the BNC input-connectors! Refer to the regulation of maximum allowable touch potential.
Safety instructions
Safety instructions for all DEWETRON systems
The DEWETRON data acquisition systems may only be installed by experts.
Read your manual before operating the system.
Observe local laws when using the instrument.
Ground the equipment: For Safety Class 1 equipment (equipment having a protective earth terminal),
a non interruptible safety earth ground must be provided from the mains power source to the product
input wiring terminals or supplied power cable.
DO NOT operate the product in an explosive atmosphere or in the presence of flammable gases or fumes and do not bring the system in contact with water.
DO NOT operate damaged equipment: Whenever it is possible that the safety protection features built into this product have been impaired, either through physical damage, excessive moisture, or any
other reason, REMOVE POWER and do not use the product until safe operation can be verified by
service-trained personnel. If necessary, return the product to a DEWETRON sales and service office
for service and repair to ensure that safety features are maintained.
Keep away from live circuits: Operating personnel must not remove equipment covers or shields.
Procedures involving the removal of covers or shields are for use by service-trained personnel only.
Under certain conditions, dangerous voltages may exist even with the equipment switched off. To
avoid dangerous electrical shock, DO NOT perform procedures involving cover or shield removal
unless you are qualified to do so.
No modifications are allowed at the instrument. The fuse in the power module has to be replaced by
the same type. For continued protection against fire, replace the line fuse(s) only with fuse(s) of the
same voltage and current rating and type. DO NOT use repaired fuses or short-circuited fuse holder
labels and print on the power module may not be removed.
DO NOT service or adjust alone. Do not attempt internal service or adjustment unless another person,
capable of rendering first aid and resuscitation, is present.
DO NOT substitute parts or modify equipment: Because of the danger of introducing additional
hazards, do not install substitute parts or perform any unauthorized modification to the product. Return
the product to a DEWETRON sales and service office for service and repair to ensure that safety
features are maintained.
Before opening the instrument (experts only) or exchanging the fuse in the power module disconnect
power!
Don’t touch internal wiring!
Don’t use higher supply voltage than specified and take care of the correct polarity, otherwise the
system will be damaged!
Use only original plugs and cables for harnessing.
Install filler-panels in unused slots.
The power-cable and -connector serve as Power-Breaker. The cable must not exceed 10 feet,
disconnect function must be possible without tools.
Keep the ventilation slots free and check them frequently to avoid an overheating of the system. The
cleaning interval of the filter pads depends on the environmental conditions.
Safety of the operator and the unit depend on following these rules.
DEWETRON is not responsible for any damage or injury that could result from improper connection or
misuse!
DE-M0331E • DEWE-EPAD modules • Technical Reference Manual • Printing version 2.1.3 • September 04, 2008
7
General Information
CAUTION
The system BIOS is protected by password. Any change in the BIOS may cause a system crash.
When the system is booting, do not press ESC-button on keyboard. This may clear the BIOS settings
and cause system faults.
Any change in the file structure as deleting or adding files or directories might cause a system crash.
Before installing software updates contact DEWETRON or your local distributor. Use only software
packages which are released by DEWETRON. Further informations are also available in the internet
(http://www.dewetron.com).
After power off the system wait at least 10 seconds before switching the system on again. Otherwise
the system may not boot correct. This prolongs also the life of all system components.
Environmental Considerations
Information about the environmental impact of the product.
Product End-of-Life Handling
Observe the following guidelines when recycling a DEWETRON system:
System and Components Recycling
Production of these components required the extraction and use of natural resources. The substances
contained in the system could be harmful to your health and to the environment if the system is improperly
handled at it's end of life! Please recycle this product in an appropriate way to avoid an unnecessary pollution
of the environment and to keep natural resources.
This symbol indicates that this system complies with the European Union’s requirements
according to Directive 2002/96/EC on waste electrical and electronic equipment (WEEE).
Please find further informations about recycling on the DEWETRON web site
www.dewetron.com
Restriction of Hazardous Substances
This product has been classified as Monitoring and Control equipment, and is outside the scope of the
2002/95/EC RoHS Directive. This product is known to contain lead.
8
General module information
General module information
Calibration information
All DEWETRON modules are calibrated at 25 °C and meet their specifications when leaving the factory.
The time interval for recalibration depends on environmental conditions. Typically, the calibration should be
checked once a year.
Calibration certificates are available from DEWETRON as an option. DEWETRON offers two types:
ISO traceable DEWETRON certificate
Calibration certificate according to ÖKD (equivalent to DKD)
This manual contains no calibration information. For self calibration, there is a seperate calibration kit
available. The CAL-KIT contains the required cables, software and instructions.
General module specifications
Environmental:
Temp. range storage: -30 °C to +85 °C (-30 °F to 185 °F)
Temp. range operating:
-5 °C to +60 °C (-4 °F to 140 °F)
Enhanced temp. range: on request
Relative humidity (MIL202): 0 to 95 % at 60 °C, non-condensing
RFI susceptibility: ±0.5 % span error at 400 MHz, 5 W, 3 m
All modules are produced according ISO9001 and ISO14001.
RS-232/485 interface
All EPAD series modules can be configured via RS-485 interface. An additional RS-232/485 or USB/RS-485
converter is required to connect the EPAD series modules to any PC or notebook, for example the
EPADBASE module.
To communicate with the EPAD modules, the RS-232 interface has to be set to the following parameters:
baud rate: 9600 bps
data bits: 8
parity: no parity
stop bits: 1
handshake: not required
DE-M0331E • DEWE-EPAD modules • Technical Reference Manual • Printing version 2.1.3 • September 04, 2008
9
Notes
10
EPAD Modules Series
EPAD-BASE Module
Basic EPAD communication module
Dewe-modules interface (DAQ and PAD) via native USB or RS232 interface
transforms PAD data to CAN
works always independant on where it is
connected on the PC
recognizes USB communication losses and reports
it back in DEWESoft
Module specifications
EPAD-BASE
Function:
RS-485 interface:
Interface speed:
RS-232/485 or USB/RS-485 conversion, power hosting for all EPAD modules in the chain
Isolation voltage:
Connection to EPAD modules:
Cable length:
Max. number of modules:
Dimensions (W x D x H):
Weight
Power supply:
Supply voltage:
Power consumption:
Mains adapter:
Input:
Output:
Standard 9600 bps
2400 to 115200 programmable, depending on cable length and environment
350 VDC
100 m for the whole chain with standard cables and power supply
Up to 1000 m on request
16 modules with standard configuration @ each EPAD-BASE module
Up to 64 modules on request
114 x 85.5 x 35 mm (4.5 x 3.4 x 1.4 in.)
typ. 450 g
10 to 30 VDC
2.2 W (max.)
Included with EPAD-BASE module
100 to 240 VAC, 50 / 60 Hz, 320 mA max.
15 VDC, 800 mA max.
LED state
The LED shows two operation states: power supply connected (constant active) and data transfer (flashing).
Connection
1
2
3
4
Interface to EPAD series modules
RS-232 / optional USB interface to PC
DC power supply connector
State LED
1
2
3
4
DE-M0331E • DEWE-EPAD modules • Technical Reference Manual • Printing version 2.1.3 • September 04, 2008
3-11
EPAD-BASE Module
Interface to EPAD series modules
EPAD series modules can be daisy-chained to the EPAD-BASE module. Each EPAD series module has two
identical connectors - one for the previous module and a second one for the next module in the chain. The
EPAD-BASE module has just one connector.
3
2
1
5-pin Binder 710 series
connector
4
5
Schematic
Pin assignment:
1 RS-485 (A)
2 RS-485 (B)
3 Power supply (+)
(standard: +15 V)
4 GND
5 Shield
RS-232 interface connector
The RS-232 interface is used to connect the EPAD-BASE box (with all EPAD series modules in the chain) to
the PC or notebook.
Pin assignment
1 2 3 4 5
1: Reserved
2: RD (Received Data)
3: TD (Transmitted Data)
9-pin SUB-D
4: Reserved
6 7 8 9
connector (female)
5: GND (Ground)
Schematic
6: Reserved
7: Reserved
8: Reserved
9: Reserved
USB interface connector
The USB interface is used to connect the EPAD-BASE box (with all EPAD series modules in the chain) to the
PC or notebook.
Pin assignment
1: +5 VDC
2: Data 3: Data +
4: Ground
4-pin USB connector
Schematic
DC power supply connector
Connect the mains adaptor which is included with the EPAD-BASE module or any other DC source (10 to
30 VDC) to the DC power supply connector to supply the EPAD-BASE module and all EPAD series modules
connected to the cain.
GND (-)
3-12
+10 to 30 VDC
EPAD-V8-P Module
8 channel voltage amplifier
Intelligent amplifier with integrated A/D conversion
8 differential voltage input channels
Dasy-chain to other EPAD series modules
Module specifications
EPAD-V8-P
Input channels:
Input signals:
Voltage:
Current:
Resolution:
Sampling rate:
Readout speed:
DC accuracy:
Bandwidth (-3 dB):
Isolation voltage:
Overvoltage protection:
Common mode voltage:
NMR (50/60 Hz):
CMR (50/60 Hz):
Interface:
Communication speed:
Standard settings:
Power supply voltage:
Power consumption:
Dimensions:
Base module (W x D x H):
Mounting holes distance:
Weight:
8 differential voltage input channels
±100 mV, ±150 mV, ±500 mV, ±500 mV, ±1 V, ±2.5 V, ±5 V, ±10 V, ±50 V, -0.15 to +1.5 V
With external shunt resistor
10 µV for all types
Max. 6 Hz per channel
Depending on system and number of channels (typ. 50 ch/sec.)
±0.02 % of reading ±400 µV
3 Hz (±1.5 dB @ f0)
350 VDC (channel to channel and input to output)
150 VDC
350 VDC / 250 VAC @ 50 Hz
120 dB
130 dB (140 dB @ DC)
RS-485
9600 bps (2400 to 115200 programmable)
9600 bps, 8 data bits, 1 stop bit, no parity, module address 00 hex
7 to 40 VDC
Typical 0.6 W
153 x 73 x 39 mm (6.0 x 2.9 x 1.5 in.) incl. mounting holes
143 x 23 mm (5.6 x 1.5 in.), 4 mm (0.157 in.) diameter
typ. 450 g
LED state
The LED is flashing when data transfer is active.
Push button
Use the ID button to define the module address via software. Detailed information how to use the button is
available in the software documentation (DEWESoft Software Users Manual, DEWEDaq Users Manual).
DE-M0331E • DEWE-EPAD modules • Technical Reference Manual • Printing version 2.1.3 • September 04, 2008
3-13
EPAD-V8-P Module
Connection
1
2
3
4
1
2
3
Voltage input connector
State LED
ID button
2x EPAD interface connector
4
Voltage input connector
The EPAD-V8-P module offers 8 differential voltage input channels.
Pin assignment:
9-pin female DSUB connector
1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25
Schematic
1
2
3
4
5
6
7
8
9
10
11
12
Channel 0
Channel 0
Channel 1
Channel 1
Channel 2
Channel 2
Channel 3
Channel 3
Channel 4
Channel 4
Channel 5
Channel 5
(+)
(-)
(+)
(-)
(+)
(-)
(+)
(-)
(+)
(-)
(+)
(-)
13
14
15
16
17
18
19
20
21
22
23
24
25
Channel 6
(+)
Channel 6
(-)
Channel 7
(+)
Channel 7
(-)
Digital input 1
Digital input 2
Digital input 3
+12 VDC
Reset / Digital input 4
GND
Reserved
Reserved
Reserved
EPAD interface connector
This connector can be used to connect the module to the EPAD-BASE module or other EPAD series
3
2
1
5 pin Binder 710 series
connector
4
5
Schematic
Pin assignment:
1 RS-485 (A)
2 RS-485 (B)
3 Power supply (+)
(standard: +15 V)
4 GND
5 Shield
Programming information
The EPAD-V8-P programming information is available in the DEWE-MODULES Programmers Reference
Manual.
3-14
EPAD-TH8-P-x Module
8 channel thermocouple amplifier
Intelligent amplifier with integrated A/D conversion
8 input channels for thermocouples
Available thermocouple types:
EPAD-TH8-P-K:
K type
EPAD-TH8-P-J:
J type
EPAD-TH8-P-T:
T type
Daisy-chain to other EPAD series modules
Module specifications
EPAD-TH8-P-x
Input channels:
Input signals:
EPAD-TH8-J:
EPAD-TH8-K:
EPAD-TH8-T:
Resolution:
Sampling rate:
Readout speed:
Accuracy:
Thermocouple type J:
Thermocouple type K:
Thermocouple type T:
Bandwidth (-3 dB):
Isolation voltage:
Overvoltage protection:
Channel to channel voltage:
NMR (50/60 Hz):
CMR (50/60 Hz):
Interface:
Communication speed:
Standard settings:
Power supply voltage:
Power consumption:
Dimensions:
Base module (W x D x H):
Mounting holes distance:
Weight:
8 differential input channels
Thermocouple types depending on module
J: -210 °C to 1200 °C
K: -270 °C to 1372 °C
T: -270 °C to
400 °C
Other types on request
1 µV for all types
Max. 6 Hz per channel
Depending on system and number of channels (typ. 50 ch/sec.)
±1.0 °C @ -210 to -100 °C
±0.3 °C @ -100 to 760 °C
±0.4 °C @ 760 to 1200 °C
±1.0 °C @ -200 to -25 °C
±0.4 °C @ -25 to 1000 °C
±0.5 °C @ 1000 to 1372 °C
±1.0 °C @ -250 to -150 °C
±0.4 °C @ -150 to 400 °C
3 Hz (±1.5 dB @ f0)
350 VDC (channel to channel and input to output)
15 VDC
100 VDC
120 dB
130 dB
RS-485
9600 bps (2400 to 115200 programmable)
9600 bps, 8 data bits, 1 stop bit, no parity, module address 00 hex
7 to 40 VDC
Typical 0.6 W
153 x 73 x 39 mm (6.0 x 2.9 x 1.5 in.) incl. mounting holes
143 x 23 mm (5.6 x 1.5 in.), 4 mm (0.157 in.) diameter
Typical 450 g
LED state
The LED is flashing when data transfer is active.
Push button
Use the ID button to define the module address via software. Detailed information how to use the button is
available in the software documentation (DEWESoft Software Users Manual, DEWEDaq Users Manual).
Connection
DE-M0331E • DEWE-EPAD modules • Technical Reference Manual • Printing version 2.1.3 • September 04, 2008
3-15
EPAD-TH8-P-x Module
1
2
3
4
1
2
3
8x thermocouple connector
State LED
ID button
2x EPAD interface connector
4
Thermocouple connectors
The EPAD-TH8-P-x module supports up to 8 thermocouples. Connect only thermocouple types which match
with the connector types. If the module is equipped with type K connectors, you are allowed to connect type
K thermocouples only.
EPAD interface connector
This connector can be used to connect the module to the EPAD-BASE module or other EPAD series
modules.
3
2
1
5 pin Binder 710 series
connector
4
5
Schematic
Pin assignment:
1 RS-485 (A)
2 RS-485 (B)
3 Power supply (+)
(standard: +15 V)
4 GND
5 Shield
Typical daisy-chain application
Programming information
The EPAD-TH8-P-x programming information is available in the DEWE-MODULES Programmers Reference
Manual.
3-16
EPAD-TH8-P Module
8 channel thermocouple and RTD amplifier
Intelligent amplifier with integrated 24-bit A/D conversion
8 galvanic isolated input channels
External CJC
Automatic sensor block detection
Signal connection via 25-pin SUB-D connector
Direct thermocouple and RTD connection via
PAD-CB8-xx connection block
Module specifications
EPAD-TH8-P
Input channels:
Input voltage:
Input resistance:
Gain linearity:
Bandwidth:
Resolution:
Temperature drift:
Typical noise:
DC accuracy:
Sampling rate:
Readout speed:
Isolation voltage:
Overvoltage protection:
Channel to channel voltage:
NMR (50/60 Hz):
CMRR (50/60 Hz):
RS-485 interface:
Interface speed:
Power supply voltage:
Power consumption:
8 differential input channels
±1.5 V
1.4 MΩ
0.001%
3 Hz
1 µV (24-bit)
30 ppm/°K
2 µV
Better ±0.05 % ±200 µV (typ. ±0.03 % F.S. ±20 µV)
Max. 6 Hz per channel
Depending on system and number of channels (typ. 50 ch/sec.)
350 VDC (channel to channel and input to output)
15 VDC
100 VDC
120 dB
130 dB
Yes
9600 bps (2400 to 115200)
±9 VDC (±10 %)
Typical 0.6 W
LED state
The LED is flashing when data transfer is active.
Push button
Use the ID button to define the module address via software. Detailed information how to use the button is
available in the software documentation (DEWESoft Software Users Manual, DEWEDaq Users Manual).
DE-M0331E • DEWE-EPAD modules • Technical Reference Manual • Printing version 2.1.3 • September 04, 2008
3-17
EPAD-TH8-P Module
Signal connection
General
To use the full power of the EPAD-TH8-P module, a CB-8-RTD connection block for RTD sensors should be
ordered together with the module.
EPAD-TH8-P module
1:
2:
3:
4:
1
2
3
1
2
3
4
5
6
7
8
9
10
11
12
SUB-D 25 connector
State LED
ID Button
2 x EPAD interface conector
4
Channel 0
Channel 0
Channel 1
Channel 1
Channel 2
Channel 2
Channel 3
Channel 3
Channel 4
Channel 4
Channel 5
Channel 5
(+)
(-)
(+)
(-)
(+)
(-)
(+)
(-)
(+)
(-)
(+)
(-)
13
14
15
16
17
18
19
20
21
22
23
24
25
Channel 6 (+)
Channel 6 (-)
Channel 7 (+)
Channel 7 (-)
Sensor identification (SI1)
Sensor identification (SI2)
Sensor identification (SI3)
+12 VDC
Reset (SI4)
GND
CJC
CJC
CJC
EPAD interface connector
This connector can be used to connect the module to the EPAD-BASE module or other EPAD series
modules.
3
2
1
5 pin Binder 710 series
connector
4
5
Schematic
Pin assignment:
1 RS-485 (A)
2 RS-485 (B)
3 Power supply (+)
(standard: +15 V)
4 GND
5 Shield
Programming information
The EPAD-TH8-P-x programming information is available in the DEWE-MODULES Programmers Reference
Manual.
3-18
EPAD-TH8-P Module
PAD-CB8-RTD
Connector block for up to 8 RTDs type Pt100, Pt200,
Pt500, Ni120, ... The sensor supply is galvanic isolated
to the EPAD-TH8-P.
Connector block specifications
PAD-CB8-RTD
Input channels:
Constant current:
Constant current drift:
Connection types:
Standard input ranges:
CB8-RTD-S3:
Accuracy:
Typical noise:
Operating temperature:
Cabel length:
Dimensions (WxDxH):
8 RTDs
1250 µA (CB8-RTD-S3: 250 µA)
5 ppm/°K
2-, 3- or 4-wire
Resistor 0 to 999,99 Ohm, Pt100 a = 0.00385; Pt100 a = 0.003916; Pt200; Pt500; Ni120
Resistor 0 to 999,99 Ohm, Pt100 a = 0.00385; Pt100 a = 0.003916; Pt200; Pt500; Pt1000; Pt2000
Pt100 a = 0.00385
Pt200 a = 0.00385
Pt500 a = 0.00385
Pt100 a = 0.003916
±0.25 °C @ -200 to 100 °C ±0.25 °C @ -200 to 100 °C ±0.25 °C @ -200 to 100 °C ±0.25 °C @ -200 to 100 °C
±0.4 °C @ 100 to 400 °C
±0.4 °C @ 100 to 400 °C ±0.4 °C @ 100 to 400 °C ±0.4 °C @ 100 to 250 °C
±0.8 °C @ 400 to 800 °C
±0.8 °C @ 400 to 800 °C ±0.5 °C @ 400 to 630 °C
Pt1000 a = 0.00385
Pt2000 a = 0.00385
Ni120
±0.25 °C @ -200 to 100 °C ±0.25 °C @ -200 to 100 °C ±0.3 °C @ -80 to 100 °C
±0.4 °C @ 100 to 400 °C
±0.4 °C @ 100 to 400 °C ±0.6 °C @ 100 to 260 °C
±0.8 °C @ 400 to 600 °C
±0.8 °C @ 400 to 600 °C
0.01 °C
-25 to +80 °C
2m (up to 12 m on request)
approx. 196 x 57 x 32.2 mm (7.7 x 2.2 x 1.3 in.)
CH 0
CH 1
CH 2
CH 3
CH 4
CH 5
CH 6
CH 7
57
PAD-CB8-RTD
Dimensions PAD-CB8-RTD
196
32,2
(Dimensions in mm; 1 inch = 25.4 mm)
PAD-CB8-RTD block diagram
12 V
25-pin SUB-D
PAD-TH8-P
DC
DC
CH 0
CH 1
CH 7
GND
GND
GND
Analog input 0..7
GND
DE-M0331E • DEWE-EPAD modules • Technical Reference Manual • Printing version 2.1.3 • September 04, 2008
3-19
EPAD-TH8-P Module
Sensor connection
2-wire connection
9-pin SUB-D
connector
1
3-wire connection
RTD sensor
9-pin SUB-D
connector
1
2
SENSE
7
SENSE
2
4-wire connection
RTD sensor
9-pin SUB-D
connector
RTD sensor
1
SENSE
2
SENSE
7
SENSE
5
6
6
7
4
4
SENSE
6
4
Measuring temperature with Pt100 or similar sensors is based on simple resistor measurements. Keep in
mind that the resistance of the lead will influence the measurement result. The resistance changes with the
temperature, the length and the diameter of the lead.
The 4-wire connection will completely remove all the measurement errors caused by lead resistance.
Using 2-wire connection the lead resistance will be within the measurement result. Especially using long and
thin wires from the PAD-CB8-RTD to the temperature sensors will distort the measurement result.
The 3-wire connection will also compensate the lead resistance completely if all three wires have the same
diameter and length. In that case it is safe to assume that the lead resistance of all three wires is the same.
Therefore the resistance of only one wire has to be measured for eliminating the lead resistance influence.
Be aware that the PAD-CB8-RTD is only supported by EPAD-TH8-P modules with firmware version 5 or
later (delivered October 2002 or later).
3-20
EC-Certificate of conformity
EC-Certificate of conformity
Manufacturer:
DEWETRON Elektronische Messgeraete Ges.m.b.H.
Address: Parkring 4
A-8074 Graz-Grambach Austria
Tel.: +43 316 3070 0
Fax: +43 316 3070 90
e-mail: sales@dewetron.com
http://www.dewetron.com
Name of product:
DEWE-EPAD modules
Signal conditioning amplifiers
Kind of product:
The product meets the regulations of the following EC-directives:
73/23/EEC
"Directive on the approximation of the laws of the Member States relating to
electrical equipment designed for use within certain voltage limits amended by
the directive 93/68/EEC"
89/336/EEC
"Directive on the approximation of the laws of the Member States relating to
electromagnetic compatibility amended by the directives 91/263/EEC, 92/31/
EEC, 93/68/EEC and 93/97/EEC
The accordance is proved by the observance of the following standards:
L
V
E
M
C
Safety
IEC/EN 61010-1:1992/93
IEC/EN 61010-2-031
IEC 61010-1:1992/300 V CATIII Pol. D. 2
IEC 1010-2-031
Emissions
EN 61000-6-4
EN 55011 Class B
Immunity
EN 61000-6-2
Group standard
Graz, April 25, 2008
Place / Date of the CE-marking
Ing. Herbert Wernigg / Managing director
DE-M0331E • DEWE-EPAD modules • Technical Reference Manual • Printing version 2.1.3 • September 04, 2008
C1
Notes
C2