Wiring the Module Figure 3-34 shows field wiring for locally terminated isolated
Figure 3-33. Isolated Thermocouple Module Wiring Diagram
Revised Aug-2015
ControlWave I/O Expansion Rack Instruction Manual
thermocouple modules. Figure 3-35 shows field wiring for remotely
terminated isolated thermocouple modules.
The cold junction compensation (CJC) with a built-in RTD provides
thermocouple temperature compensation at the terminal block and is
electrically isolated. Pins 8, 9 and 10 of the local terminal block source
and sink the CJC's RTD.
Figure 3-35 also provides diagrams showing the wiring for
thermocouples and the 3-wire RTDs to a locally terminated
thermocouple module. Wiring assignments (that is, +AI#, -AI#, +CJC
(Sense), -CJC (Return) & +CJC (Reference) are similar to those
assigned to the remote DIN-rail mountable terminal blocks. A small
CJC PCB is factory-installed to the terminal block.
I/O Modules
3-41
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