Rockwell Automation 1797-IRT8 FLEX Ex Thermocouple/RTD Module User Manual
Page 10
10 FLEX Ex Thermocouple/RTD Input Module
Publication
1797-5.4 - June 2010
Type of Input
Connect the Following
+
H
L
-
Shield
1
RTD - 2-wire
1
2
RTD - 3-wire
1
3
2
RTD - 4-wire
1
1a
2a
2
Thermocouple
1
2
Millivolt
1
2
1Terminals 16, 33, 40…45 are chassis ground.
RTD or
Thermocouple
Channel
RTD Source
Current
(+)
High Signal
Terminal
(H)
Low Signal
Terminal
(L)
Signal
Return
(-)
0
0
1
2
3
1
4
5
6
7
2
8
9
10
11
3
12
13
14
15
4
17
18
19
20
5
21
22
23
24
6
25
26
27
28
7
29
30
31
32
+V
Terminals 34 and 50
-V
Terminals 35 and 51
1 Terminals 37, 38, and 39, and 46, 47, and 48 are for cold junction
compensation (with 38, and 47 chassis ground). Connect CJC1 to
terminal 5 or 22, CJC2 to terminal 12 or 29
2 Terminals 16, 33, and 40…45, are chassis ground.
ATTENTION
Do not use the unused terminals on this terminal base unit.
Using these terminals as supporting terminals can result in
damage to the module and/or unintended operation of your
system.
1
2
3
1a
2a
1
2
1
2
1
2
1
2
2-wire RTD
3-wire RTD
4-wire RTD
Thermocouple
Millivolt