Allen-Bradley 1794-IRT8 - Calibration Setups; Wiring Connections for Calibrating the Tc;Rtd;MV Input Module

Publication 1794-6.5.12 - November 1997
Calibrating Your Module 6-3
Calibration Setups
Wiring Connections for Calibrating the TC/RTD/mV Input
Module
12 34 5 678 91011121314150
Using Precision Resistors -
for 383W and 100W calibration
17
18
19
20
21 22 23
24
25 26
27
28 29 30
31
32
33
16
01
2
3456
7
8
9
10 11 12
13
14 15
35
36
37 38
39
40
41
42 43 44
45
46
47
48 49 50 51
34
17
18 19
20
21 22
23
24 25
26 27 28 29
30
31 32
33
16
0
1
2
3
4
56
7
89
10 11 12 13 14
15
12 3 4 56 7 891011121314150
35 36
37
38
39 40
41
42
43 44
45
46
47
48
49 50
51
34
1794-TB3G
Precision Voltage Source
Using Precision Voltage Source -
for offset and gain calibration
+
-
Connect + to terminals 2, 6, 10, 14, 19, 23, 27, and 31
Connect - to terminals 3, 7, 11, 15, 20, 21, 28 and 32
Connect one 10K ohm, 0.5% resistor across terminals 37 and 39 and another across 46 and 48.
Type of Input
Connect the following:
H L + – Shield
1
RTD – 4-wire 1a 2a 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).
2 Terminals 16, 33 and 40 thru 45 are chassis ground.