Wiring the thermocouple input module – Rockwell Automation 1794 FLEX I/O System with ControlLogix for SIL2 User Manual
Page 33
Publication 1794-RM001G-EN-P - December 2011
FLEX I/O Modules 3-11
Wiring the Thermocouple Input Module
In addition to following the General Considerations when using Any FLEX
I/O Analog Input Module on page 3-7, before wiring the module, consider
the following application guideline:
•
Wire to Same Input Channel on Both Modules: When wiring
thermocouples, wire two in parallel to two modules. Use the same
channel on each module to make sure of consistent temperature
readings.
Figure 3.10 FLEX I/O Analog Thermocouple Module Wiring
+
-
+
-
+
-
+
-
Thermocouple
Input Module
Thermocouple
Input Module
Thermocouple/
RTD/mV
Input Module
Thermocouple/
RTD/mV
Input Module
1794-TB3T
1794-TB3T
1794-TB3G
1794-TB3G
1794-IT8
1794-IT8
1794-IRT8
1794-IRT8
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