A SERVICE OF

logo

Open as PDF
next previous
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
012 3456789
10
11 12 13 14 15
16
1234567891011121314150
35 36 37 38 39 40 41 42 43 44 45 46
48
49 50 5134
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.