Attention – Rockwell Automation 1794-IRT8XT FLEX I/O Thermocouple/RTD /Millivolt Input Module User Manual User Manual
Page 31
Publication 1794-6.5.12 - September 2011
Install Your FLEX I/O Input Module 19
Example of 2-, 3- and 4-wire RTD and Thermocouple Wiring to a 1794-TB3G
Terminal Base Unit
IMPORTANT
Disconnecting and reconnecting RTDs or CJCs with power applied
temporarily disturbs the channel steady state data. Allow 2 minutes
for settling time after finishing connections.
IMPORTANT
If using RTD isolators, use 2- or 4-wire configurations only, and add
digital filtering to the inputs.
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
0
35
36
37
38
39
40
41
42
43
44
45
46
48
49
50
51
34
1794-TB3G
0...15
34...51
16...33
A
B
C
4-Wire RTD Channel 3
2-Wire RTD Channel 1
3-Wire RTD Channel 2
+
-
CJC
Thermocouple Channel 4
1
2
2
1
1
3
2
1
1a
2a
2
47
45329
ATTENTION
Keep exposed area of inner conductor as short as possible.