Rockwell Automation 1492-CM1771-LA005 Analog I/O Conversion Module - Manual (Page 6)

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V. Wiring Diagrams (Cont’d)
PN-114291
DIR 10000060102 (Version 02)
Publication 1492-IN048B-EN-E
Printed in U.S.A.
Conversion: 1771-IXHR (1) to 1756-IRT8I (1)
1492-CM1771-LA005 SER “B”
SH
1492-CONACAB005G8
Thermocouple
+
-
T
18
14
13
12
11
8
6
5
1771-WI Swing Arm
From 1771-IXHR
17
16
15
4
3
2
1
10
9
7
18
17
16
15
14
13
12
11
10
9
8
7
6
5
Orange/Red
White/Red
Green/White
Blue/White
Orange/Black
Red/White
Black/Red
Blue/Black
Black/White
Green/Black
Blue
Orange
Red/Black
White/Black
4
3
2
1

SHIELD GROUNDING: In some installations, the field wiring shield was grounded on the 1771 chassis. If this was
the case, the installer must remove these shield connections from the 1771 chassis and they can be connected
to the grounding stud on the 1492-CM1771-LA005 SER”B” module. The pre-wired cable used between the 1492-CM1771-LA005 SER”B”
module and the 1756-IRT8I [1492-CONACAB005G8] provides a shield ground lug to ground the shield at the 1756
ControlLogix chassis, this must be connected. Do NOT connect this ground lug to the conversion module grounding stud.
CONVERSION MODULE INSTALLATION AND APPLICATION CONSIDERATIONS

The 1771-IXHR has built CJC (cold junction compensation) into the swing-arm. The conversion module [1492-CM1771-LA005 SER”B”]
passes this CJC signal to the 1756-IRT8I. Ensure that the 1756-IRT8I is configured for external CJC.

The 1771-IXHR input configuration was software configured, as is the 1756-IRT8I. Please ensure the correct configuration
in the 1756-IRT8I.

Refer to your 1771-IXHR and 1756-IRT8I Installation and User Manuals for additional information concerning comparisons
of module wiring, features and configuration details.
WARNING There are several key application considerations and system specifications (bottom of drawing) when using
these components (conversion module, cable and input module). Read and understand these considerations
before installation.
Conversion Module
Cable


This Bul. 1492 cable consists of a cable wired to one 1756-IRT8I RTB. Recommended cable lengths of
0.5M or 1.0M (005=0.5M, 010=1.0M).


1756-IRT8I
3
32
31
15
11
19
7
27
23
2
8
4
16
12
24
20
28
1
CJC+
CJC-
In_CH0+
In_CH0-
In_CH1+
In_CH1-
In_CH2+
In_CH2-
In_CH3+
In_CH3-
In_CH4+
In_CH4-
In_CH5+
In_CH5-
In_CH6+
In_CH6-
In_CH7+
In_CH7-
26
25
30
29
9
6
13
10
17
14
21
18 5
22
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
Blue
Orange
Red/Black
White/Black
CJC+
CJC-
In_CH0+
In_CH0-
In_CH1+
In_CH1-
In_CH2+
In_CH2-
In_CH3+
In_CH3-
In_CH4+
In_CH4-
In_CH5+
In_CH5-
In_CH6+
In_CH6-
In_CH7+
In_CH7-