Fused Field Wire Conversion Module for A-B 1771-OBD to two 1756-OC8
(Cat 1492-CM1771-LD008F)
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I. Module Description
The 1492-CM1771-LD008F, fused conversion module provides field wire signal conversion from an A-B 1771-OBD,
10 to 60Vdc, 16 point output module to two (2) 1756-OC8, 30 to 60Vdc , 8 point output modules. The conversion module provides the mating connector to the 1771-OBD module swing-arm/terminal block with the attached field wires. It routes those signals via its 37-pin connector and a single 1492-CONCAB S1 pre-wired cable to compatible terminals on the two (2) 1756-OC8 modules. To maintain the functionality of the 1771-OBD module the
conversion module provides 1 mechanical fuse; 1 for each DC+ (refer to the Wiring Diagram on page 2 for details).
NOTICE: The two 1756-OC8 modules must be located directly adjacent to each other in the 1756 chassis, due to the orientation of the 1756 terminals on the 1492-CONCAB S1 pre-wired cable.
Cable
1492-CONCAB S1
Conversion Compatibility and Product I.D. Label
37-Pin Connector for cable
1492-CONCAB S1
1492-CM1771-LD008F 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.
II. Module Installation
The 1492-CM1771-LD008F 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
1492-CM1771-
LD008F
Compatible 1771
Output Module
1771-OBD
Compatible 1756
Output Module
Two
1756-OC8
Required 1492 Cable
1492-CONCAB S1
This is cable length in meters. Available lengths are limited to 005 (0.5m) and 010 (1.0m)
PN-40381
DIR 10000045377 (Version 00)
Printed in U.S.A.
IV. Conversion Module Wiring Diagram
The following diagram shows the connections from the existing 1771-OBD swing-arm, through the conversion module, 1492 cable and to the two 1756-OC8 output modules. The diagram 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-OBD to 1756-OC8 Qty. 2 with 1492-CM1771-LD008F
1492-CM1771-LD008F
1492-CONCAB005S1
1756-OC8
-
+
LOAD
1771-WH, WHF,
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
WHFB Swing Arm
DC(-)
06
07
10
11
12
02
03
04
05
13
14
15
16
17
A
B
C
D
00
01
E
12
13
14
15
16
17
6
7
8
9
10
11
1
4
5
2
3
18
29
30
31
32
33
24
25
26
27
28
34
35
36
37
19
20
21
22
23
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
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
Green/Black/Orange
Orange/Black/Green
Blue/White/Orange
Black/White/Orange
White/Red/Orange
White/Red/Blue
10
12
14
16
18
4
6
8
5
7
9
2
1
3
11
13
15
17
19
20
5
7
12
14
16
18
11
6
8
9
4
10
13
15
17
19
20
2
1
3
DC-0(+)
OUT-0
OUT-1
OUT-2
OUT-3
RTN OUT-0
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
DC-0(+)
OUT-0
OUT-1
OUT-2
OUT-3
RTN OUT-0
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
Conversion Module Installation and Application Considerations
The 1771-OBD module output current limits versus 1756-OC8 limits are as follows: a) Current/Point
1771-OBD
2A
1756-OC8 w/1492-CONCAB005S1
2A b) Current /Module c) Surge Current /Point
8A
4A for 10ms
8A
4A for 10ms
1756-OC8
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 1492-CONCAB005S1 is limited to 3A per pin.
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 00)]
PN-40381
DIR 10000045377 (Version 00)
(2)
V. Fuse Installation and Replacement
The 1492-CM1771-LD008F conversion module has one mechanical fuse holder with the fuse located on the circuit board inside the modules plastic case. The following explains how to replace the fuse:
1) Remove the 4 screws that hold both halves of the conversion module case together (refer to the following
Figure A).
Figure A
2) Disassemble both case halves so you can access the module’s circuit board. Remove and replace the fuse
(refer to the below Figure B).
Fuse holder and Fuse
Figure B
3) Reassemble the two case halves to the circuit board and replace the four screws that hold the case together
(Do NOT over torque the screws (Maximum torque is 5.0 in-lbs.)
NOTES:
1) For module operation a fuse must be inserted into the fuse holder
2) Physical Fuse Size: 2AG
3) Possible Fuse Supplier: LittelFuse (Part Number: 225010P)
4) Maximum Fuse Current rating based on Conversion System Components: 10.0 Amps
PN-40381
DIR 10000045377 (Version 00)
(3)
V. 1492-CM1771-LD008F Conversion Module Specifications
(Operating specifications are when installed in the Conversion System base / cover-plate assembly)
Dimensions
Approximate Shipping Weight
Storage Temperature
Operating Temperature
Operating Humidity
Shock
Non
operating
Operating Vibration
Maximum Operating Voltage
Max. Module Operating Current
Per Point:
Per Module:
Fusing
Specification
Agency Certifications
Pollution Degree
Environmental Rating
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)
265.4 g (0.58 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)
60 Vdc
2 Amps
8 Amps
NOTICE Refer to the Wiring Diagram(s) for current limits for a specific configuration.
One, 10 Amps (maximum current based on conversion components)
UL Classified: Under UL File Number E113724
CSA
CE: compliant for all applicable directives
2
IP20
PN-40381
DIR 10000045377 (Version 00)
(4)
VII. 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
PS
-A1B 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-40381
DIR 10000045377 (Version 00)
(5)
Cable
1492-CONCAB S1
WARNING
Conversion Compatibility and Product I.D. Label
37-Pin Connector for cable
1492-CONCAB S1
1492-CM1771-LD008F Conversion Module
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.
-
+
Conversion: 1771-OBD to 1756-OC8 Qty. 2 with 1492-CM1771-LD008F
1492-CM1771-LD008F
1492-CONCAB005S1
1756-OC8
LOAD
1771-WH, WHF,
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
WHFB Swing Arm
DC(-)
06
07
10
11
12
02
03
04
05
13
14
15
16
17
A
B
C
D
00
01
E
12
13
14
15
16
17
6
7
8
9
10
11
1
4
5
2
3
18
29
30
31
32
33
24
25
26
27
28
34
35
36
37
19
20
21
22
23
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
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
Green/Black/Orange
Orange/Black/Green
Blue/White/Orange
Black/White/Orange
White/Red/Orange
White/Red/Blue
10
12
14
16
18
4
6
8
5
7
9
2
1
3
11
13
15
17
19
20
5
7
12
14
16
18
11
6
8
9
4
10
13
15
17
19
20
2
1
3
DC-0(+)
OUT-0
OUT-1
OUT-2
OUT-3
RTN OUT-0
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
DC-0(+)
OUT-0
OUT-1
OUT-2
OUT-3
RTN OUT-0
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
1756-OC8
Conversion Module
1492-CM1771-
LD008F
Compatible 1771
Output Module
1771-OBD
Compatible 1756
Output Module
Two
1756-OC8
Required 1492 Cable
1492-CONCAB S1
Figure A
Figure B
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)
265.4 g (0.58 lbs) (includes carton)
PN-40381
DIR 10000045377 (Version 00)
Printed in U.S.A.
