Allen-Bradley 1794-IRT8 - Input Module

Publication 1794-6.5.12 - November 1997
How to Install Your Thermocouple/RTD/mV Input Module 2-11
Wiring connections for the 1794-IRT8 TC/RTD/mV Input Module
Type of Input
Connect the following:
H L + – Shield
1
RTD – 2-wire 1 2
RTD – 3-wire 312
RTD – 4-wire 1a 2a 1 2
Thermocouple 1 2
Millivolt 1 2
1 Terminals 37, 38 and 39 and 46, 47 and 48 are for cold junction compensation (with 38
and 47 chassis GND).
RTD or
Thermocouple
Channel
1794-TB3G and -TB3GS Terminal Base Units
High Signal
Terminal (H)
Low Signal
Terminal (L)
RTD Source
Current (+)
Signal Return
1
(–)
0 1203
1 5647
2 910811
3 13141215
4 18191720
5 22232124
6 26272528
7 30312932
+24V dc Power 34 and 50
24V dc Common 35 and 51
1 Terminals 37, 38 and 39 and 46, 47 and 48 are for cold junction compensation (with 38 and 47
chassis GND). Connect CJC1 to terminal 5 or 21; CJC2 to terminal 12 or 29.
2 Terminals 16, 33 and 40 thru 45 are chassis ground.
+
-
mV
1
2
1
3
2
1
1a
2
2a
1
2
1
2
2-wire
3-wire
4-wire
Thermocouple
RTD
Millivolt
!
ATTENTION: Total current draw through the terminal
base unit is limited to 10A. Separate power connections to
the terminal base unit may be necessary.