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Field Wire Conversion Module for A-B 1771-OAD to 1756-OA16 or
1771-OBD to 1756-OB16E
(Cat 1492-CM1771-LD006)
Local language (French, Italian, German & Spanish) versions of this document can be downloaded by going to www.ab.com.
In the left margin click on Publications Library and Literature Library. In the Search Area (right margin), Search by Catalog
Number and in the Search box type in the catalog number of the conversion system component.
I. Module Description
The 1492-CM1771-LD006 conversion module provides field wire signal conversion from an A-B 1771-OAD, 10 to
138Vac, 16 point output module to a 1756-OA16, 74 to 265Vac(1), 16 point output module or from a 1771-OBD, 10 to 60Vdc(1) to a 1756-OB16E, 10 to 31.2Vdc output module. The conversion module provides the mating connector to the 1771-OAD and 1771-OBD module swing-arm/terminal block with the attached field wires. It routes those signals via its 25-pin connector and a 1492-CONCAB X pre-wired cable to compatible terminals on the
1756-OA16 or 1756-OB16E (refer to Wiring Diagrams on page 2 and 3 for details).
NOTICE: The 1771-OBD module had a single on-board mechanical fuse for all outputs. The 1756-OB16E is electronically fused per group. Refer to the 1756-OB16E Installation Manual for details on electronic fusing.
Conversion Compatibility and
Product I.D. Label
25-Pin Connector for cable 1492-CONCAB X
1492-CM1771-LD006 Conversion Module
WARNING
De-energize and lockout any and all power to all I/O field devices connected to the A-B 1771 I/O chassis, and the power to the 1771 I/O chassis itself. Ensure all power is de-energized and locked out to any device in the control cabinet where the conversion is to be performed. Ensure work is performed by qualified personnel.
Refer to conversion module Specifications Section: Maximum Operating Voltage
II. Module Installation
The 1492-CM1771-LD006 conversion module must be installed in a 1492 conversion base-plate and cover-plate assembly. The installation of the module into the assembly is explained in the Installation Manual that ships with the conversion assembly. For a list of compatible assemblies refer to Appendix A.
III. Conversion Module Compatibility Matrix
Conversion Module Compatible 1771
Output Module
1492-CM1771-LD006
1492-CM1771-LD006
1771-OAD
1771-OBD
Compatible 1756
Output Module
1756-OA16
1756-OB16E
Required 1492 Cable
1492-CONCAB X
1492-CONCAB X
This is cable length in meters. Available lengths are limited to 005 (0.5m) and 010 (1.0m).
PN-40379
DIR 10000045375 (Version 00)
Printed in U.S.A.
IV. Conversion Module Wiring Diagram
The following diagrams show the connections from the existing 1771-OAD or 1771-OBD swing-arm, through the conversion module, 1492 cable and to the 1756-OA16 or 1756-OB16E output module. The diagrams can be used as an aid in possible system troubleshooting.
WARNING There are several key application considerations and system specifications (bottom of drawing) when using these components (conversion module, cable and output module). Read and understand these considerations before installation. In addition, refer to the current draw requirements of the existing loads for this configuration to ensure they are within the current ratings of the 1756 output module.
Conversion: 1771-OAD to 1756-OA16 with 1492-CM1771-LD006
L1
L2
Output
Device
L1
L1
L1
L1
Output 00
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
L2
1492-CM1771-LD006
A
B
11
12
13
14
05
06
07
10
C
D
00
01
02
03
04
15
16
17
E
1492-CONCAB005X
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
11
12
13
14
7
8
9
10
15
16
17
18
19
20
21
22
23
24
25
5
6
3
4
1
2
11
12
13
14
7
8
5
6
3
4
1
2
10
9
15
16
17
18
20
19
1756-OA16
L1-0
L2-0
OUT-0
OUT-1
OUT-2
OUT-3
OUT-4
OUT-5
OUT-6
OUT-7
OUT-8
OUT-9
OUT-10
OUT-11
OUT-12
OUT-13
OUT-14
OUT-15
L1-1
L2-1
1771-WH, WHF Swing Arm
Conversion Module Installation and Application Considerations
The 1771-OAD module output current limits versus 1756-OA16 limits are as follows: a) Current/Point
1771-OAD
2A
1756-OA16 w/ 1492-CONCAB005X
0.5A
b) Current/Module 8A c) Surge Current/point 25A for 100ms
4A
5A for 43ms
The L2 terminal (Terminal E) on the 1771-OAD module was an optional connection, but it is required for the
1756-OA16. This connection must be added if it was not connected.
The 1492-CONCAB005X is limited to 3A per pin.
The 1771-OAD is rated 10V to 138V AC. The 1756-OA16 is rated 74V to 256V AC.
Refer to your 1771-OAD and 1756-OA16 Installation Manual wiring schematics and diagrams for more details. Ensure
1756 output module ratings are not exceeded. [Reference Doc: 41170-935 (Version 00)]
PN-40379
DIR 10000045375 (Version 00)
(2)
IV. Conversion Module Wiring Diagram (Continued)
WARNING There are several key application considerations and system specifications (bottom of drawing) when using these components (conversion module, cable and output module). Read and understand these considerations before installation. In addition, refer to the current draw requirements of the existing loads for this configuration to ensure they are within the current ratings of the 1756 output module.
Conversion: 1771-OBD to 1756-OB16E with 1492-CM1771-LD006
+
-
dc Output
Device
+
+ dc
+ dc
+ dc
+ dc
Output 00
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
L2
1492-CM1771-LD006
A
B
11
12
13
14
05
06
07
10
C
D
00
01
02
03
04
15
16
17
E
1492-CONCAB005X
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
11
12
13
14
7
8
9
10
15
16
17
18
19
20
21
22
23
24
25
5
6
3
4
1
2
11
12
13
14
7
8
5
6
3
4
1
2
10
9
15
16
17
18
20
19
1756-OB16E
DC-0+
RTN OUT-0
OUT-0
OUT-1
OUT-2
OUT-3
OUT-4
OUT-5
OUT-6
OUT-7
OUT-8
OUT-9
OUT-10
OUT-11
OUT-12
OUT-13
OUT-14
OUT-15
DC-1+
RTN OUT-1
1771-WH, WHF, WHFB Swing Arm
Conversion Module Installation and Application Considerations
The 1771-OBD module output current limits versus 1756-OB16E limits are as follows: a) Current/Point
1771-OBD
2A
1756-OB16E w/ 1492-CONCAB005X
1A b) Current/Module 8A c) Surge Current/point 4A for 10ms
4A
2A for 10ms
The 1771-OBD has a single 10A, 250V rectifier fuse (1/4 x 1 1/4 inch). The 1756-OB16E is electronically fused per group. Refer to the 1756-OB16E Installation Manual for details on electronic fusing.
The 1492-CONCAB005X is limited to 3A per pin.
The 1771-OBD is rated 10V to 60V DC. The 1756-OB16E is rated 10V to 31.2V DC. If the load source voltage is greater than 30V DC, then use the 1756-OC8 with the 1492-CM1771-LD008F conversion module.
Refer to your 1771-OBD and 1756-OB16E Installation Manual wiring schematics and diagrams for more details. Ensure
1756 output module ratings are not exceeded. [Reference Doc: 41170-936 (Version 00)]
PN-40379
DIR 10000045375 (Version 00)
(3)
1492-CM1771-LD006 Conversion Module
WARNING
De-energize and lockout any and all power to all I/O field devices connected to the A-B 1771 I/O chassis, and the power to the 1771 I/O chassis itself. Ensure all power is de-energized and locked out to any device in the control cabinet where the conversion is to be performed. Ensure work is performed by qualified personnel.
Refer to conversion module Specifications Section: Maximum Operating Voltage
Conversion: 1771-OAD to 1756-OA16 with 1492-CM1771-LD006
L1
L2
Output
Device
L1
L1
L1
L1
Output 00
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
L2
1492-CM1771-LD006
A
B
11
12
13
14
05
06
07
10
C
D
00
01
02
03
04
15
16
17
E
1492-CONCAB005X
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
11
12
13
14
7
8
9
10
15
16
17
18
19
20
21
22
23
24
25
5
6
3
4
1
2
11
12
13
14
7
8
5
6
3
4
1
2
10
9
15
16
17
18
20
19
1756-OA16
L1-0
L2-0
OUT-0
OUT-1
OUT-2
OUT-3
OUT-4
OUT-5
OUT-6
OUT-7
OUT-8
OUT-9
OUT-10
OUT-11
OUT-12
OUT-13
OUT-14
OUT-15
L1-1
L2-1
1771-WH, WHF Swing Arm
Conversion: 1771-OBD to 1756-OB16E with 1492-CM1771-LD006 dc Output
Device
+ dc
+ dc
+ dc
+ dc
Output 00
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
L2
1492-CM1771-LD006
A
B
11
12
13
14
05
06
07
10
C
D
00
01
02
03
04
15
16
17
E
1492-CONCAB005X
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
11
12
13
14
7
8
9
10
15
16
17
18
19
20
21
22
23
24
25
5
6
3
4
1
2
11
12
13
14
7
8
5
6
3
4
1
2
10
9
15
16
17
18
20
19
1756-OB16E
DC-0+
RTN OUT-0
OUT-0
OUT-1
OUT-2
OUT-3
OUT-4
OUT-5
OUT-6
OUT-7
OUT-8
OUT-9
OUT-10
OUT-11
OUT-12
OUT-13
OUT-14
OUT-15
DC-1+
RTN OUT-1
1771-WH, WHF, WHFB Swing Arm
V. 1492-CM1771-LD006 Conversion Module Specifications
(Operating specifications are when installed in the Conversion System base / cover-plate assembly)
Specification
Dimensions
Approximate Shipping Weight
Storage Temperature
Operating Temperature
Operating Humidity
Shock
Non
operating
Operating Vibration
Maximum Operating Voltage
Value
11.81 in. (height) x 4.38 in. (depth) x 1.5 in. (width)
300 mm. (height) x 111.25 mm (depth) x 38.1 mm (width)
250.6 g (0.55 lbs) (includes carton)
-40 to +85°C (-40 to +185°F)
0 to 60°C (32 to 140°F)
5 to 95% at 60°C (non-condensing)
50g
30g
2g at 10 to 500Hz (Agrees with 1756 I/O module specifications)
132 Vac at 47 to 63Hz or 132 Vdc
Max. Module Operating Current
Per Point:
Per Module:
Agency Certifications
Pollution Degree
Environmental Rating
2 Amps
4 Amps
NOTICE Refer to the Wiring Diagram(s) for current limits for a specific configuration.
UL Classified: Under UL File Number E113724
CSA
CE: compliant for all applicable directives
2
IP20
VI. Appendix A - 1771 chassis to 1756 Chassis Conversion System Selection Process
1) Determine the number of 1771 I/O modules used in the 1771 I/O Chassis to be converted to 1756. NOTE: In some cases two 1756 modules may be required for one 1771 module. Select the applicable 1492 conversion modules from the
Digital and Analog Conversion Selection Table Matrix.
2) Review the Max Slots for I/O and Chassis Width data from the below table, and select a 1756 I/O Chassis which meets your conversion needs from Step 1. Ensure the information from the I/O Conversion module tables are reviewed first.
3) Once the 1756 Chassis is selected, select the Conversion Assembly. The Conversion Assembly has the same dimensional foot-print as the 1771 chassis and can use the same mounting hardware. The assembly consists of a base-plate to hold the conversion modules and a cover-plate to protect the modules and to mount the selected 1756 chassis. The combined depth of the conversion assembly with the 1756 chassis mounted is 10.25 inches (Controller w/key) to
10.0 inches (Controller w/o Key).
1771 Chassis
Chassis Parameter (1)
-A1B w/o -A1B
PS w/PS
Max Slots for I/O 4 4
1756 Equivalent
Chassis
-A4
(3)
3
-A7
6
1771 Chassis
-A2B w/o
PS
8
-A2B w/PS
8
1756 Equivalent
Chassis
1771 Chassis
1756 Equivalent
Chassis
1771 Chassis
1756 Equivalent
Chassis
-A7
(4)
6
-A10
9
-A3B1
12
-A13
(5)
12
-A4B
16
-A17
(6)
16
Chassis Width (2)
9.01
12.61
10.35
14.49
14.01
17.61
14.49
19.02
19.01
23.15
24.01
29.06
Conversion Assembly
1492-MUA1B-A4-A7 1492-MUA2B-A7-A10 1492-MUA3-A10-A13 1492-MUA4-A13-A17
Foot Notes:
1771-A3B is not listed as it is used for 19 inch wide instrumentation panels
Two 1771 width dimensions are provided as some PLC-5 processors have integrated power supplies. Dimension w/PS includes -P1, -P2, etc. Notice that the width dimension of some 1756 chassis exceed the width of the 1771 chassis with or without the power supply. Cover-plate chassis mounting design allows the excess 1756 chassis width to be evenly distributed to both sides, or excess to right or left. Carefully consider this in the conversion
1756-A4 may work in a 1771-A1B application if 4 or less I/O slots were used. Conversion cover-plate is capable to mount -A4 or -A7
1756-A7 may work in a 1771-A2B application if 6 or less I/O slots were used. Conversion cover-plate is capable to mount -A7 or -A10
1756-A10 may work in a 1771-A3B1 application if 10 or less I/O slots were used. Conversion cover-plate is capable to mount -A10 or -A13
1756-A13 may work in a 1771-A4B application if 13 or less I/O slots were used. Conversion cover-plate is capable to mount -A13 or -A17
PN-40379
DIR 10000045375 (Version 00)
Printed in U.S.A.

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