Rockwell Automation 1492-CM1771-LD007 Field Conversion Module - Manual (Page 5)

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Conversion Module Installation and Application Considerations
This Bul. 1492 cable consists of a cable wired to two 1756-OC8 RTB. Recommended cable lengths of 0.5M or 1.0M (005=0.5M,
010=1.0M). See table 2 for other lengths.
The 1771-OBD module output current limits versus 1756-OC8 limits are as follows:
1771-OBD 1756-OC8 w/ 1492-CONCAB005S1
a) Current/Point 2A 2A
b) Current /Module 8A 8A
c) Surge Current /Point 4A for 10ms 4A for 10ms
The 1771-OBD has a single 10A, 250V rectifier fuse (1/4 x 1 1/4 inch ). The 1756-OC8 is NOT fused ,as such a
2AG fuse clip and 10A fuse is provided on the 1492-CM1771-LD008F conversion module.
The 1771-OBD is rated 10V to 60V DC. The 1756-OC8 is rated 30V to 60V DC. If the load source voltages is less
than 30V DC, then use 1756-OB16E with the 1492-CM1771-LD006 conversion module.
This configuration uses two(2) 1756-OC8 output modules to replace a single 1771-OBD output module. This may require
the use of a larger 1756 I/O chassis and conversion mounting assembly. Ensure there is sufficient panel space to allow for
this possibility.
Refer to your 1771-OBD and 1756-OC8 Installation Manual wiring schematics and diagrams for more details. Ensure
1756 output module ratings are not exceeded. [Reference Doc: 41170-937 (Version 01)]
VI. Wiring Diagrams
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.
WARNING
Conversion: 1771-OBD (1) to 1756-OC8 (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
37
36
A
B
C
D
01
02
03
04
05
06
07
10
11
12
13
14
15
16
17
00
DC(+)
DC(-)
DC(+)
DC(+)
DC(+)
E
LOAD
+
-
Output 01
Output 02
Output 03
Output 04
Output 05
Output 06
Output 07
Output 10
Output 11
Output 12
Output 13
Output 14
Output 15
Output 16
Output 17
Output 00
1771-WH, WHF, WHFB Swing Arm
From 1771-OBD Green/Black/Orange
Orange/Black/Green
Blue/White/Orange
Black/White/Orange
White/Red/Orange
White/Red/Blue
Orange/Green
Black/White/Red
White/Black/Red
Red/Black/White
Green/Black/White
Orange/Black/White
Blue/Black/White
Black/Red/Green
White/Red/Green
Red/Black/Green
Black
White
Red
Green
Orange
Blue
White/Black
Red/Black
Green/Black
Orange/Black
Blue/Black
Black/White
Red/White
Green/White
Blue/White
Black/Red
White/Red
Orange/Red
Blue/Red
Red/Green
1
3
5
7
4
6
8
10
12
14
16
18
11
13
15
17
20
2
1
3
5
7
4
6
8
10
12
14
16
18
11
13
15
17
20
19
9
19
9
DC-0(+)
OUT-0
OUT-1
OUT-2
OUT-3
DC-0(+)
DC-0(+)
DC-0(+)
RTN OUT-0
DC-1(+)
DC-1(+)
DC-1(+)
DC-1(+)
OUT-4
OUT-5
OUT-6
OUT-7
RTN OUT-1
DC-0(+)
OUT-0
OUT-1
OUT-2
OUT-3
DC-0(+)
DC-0(+)
DC-0(+)
RTN OUT-0
DC-1(+)
DC-1(+)
DC-1(+)
DC-1(+)
OUT-4
OUT-5
OUT-6
OUT-7
RTN OUT-1
RTN OUT-1
RTN OUT-0
RTN OUT-1
RTN OUT-0
2
MODULE B
MODULE A
PN-114280
DIR 10000060091 (Version 01)
Publication 1492-IN038B-EN-E
Conversion Module
1492-CM1771-LD008F
Cable
1492-CONCAB005S1 1756-OC8
1756-OC8