24V dc FLEX I/O RTD Input Module
5
Publication 1794Ć5.22 - May 1999
RTD
1794ĆTB3T and ĆTB3TS Terminal Base Units
RTD
Channel
High Signal
Terminal
Low Signal
Terminal
Signal
Return
Shield
Return
1
0
0
1
17
39
1
2
3
19
40
2
4
5
21
41
3
6
7
23
42
4
8
9
25
43
5
10
11
27
44
6
12
13
29
45
7
14
15
31
46
24V dc Common
16, 17, 19, 21, 23, 25, 27, 29, 31 and 33
+24V dc power
34 and 51
1
Terminals 39 to 46 are chassis ground.
Example of 2Ć, 3Ć and 4Ćwire RTD Wiring to a 1794ĆTB3 Base Unit
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 47 48 49 50 51
34
1794ĆTB3
0 -15
34-51
16-33
A
B
C
4ĆWire RTD
2ĆWire RTD
3ĆWire RTD
Clip or tieback
4th lead.
Attention:
Keep exposed area of inner conductor as short as possible.
