Allen-Bradley 1492-CM1771-LD008F Manuel utilisateur

Fused Field Wire Conversion Module for A-B 1771-OBD to two 1756-OC8

(Cat 1492-CM1771-LD008F)

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-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 compat-

ible 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.

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



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.

Conversion Module Compatible 1771

Output Module

Compatible 1756

Output Module

Required 1492 Cable

1492-CM1771-

LD008F

1771-OBD Two

1756-OC8

1492-CONCABS1

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.

WARNING

1492-CM1771-LD008F Conversion Module

Conversion Compatibility

and Product I.D. Label

37-Pin Connector for cable

1492-CONCAB

S1

Cable

1492-CONCAB

S1

(2)

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.

Conversion Module Installation and Application Considerations

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 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)]

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.

WARNING

PN-40381

DIR 10000045377 (Version 00)

1492-CONCAB005S1

1492-CM1771-LD008F

Conversion: 1771-OBD to 1756-OC8 Qty. 2 with 1492-CM1771-LD008F

DC(+)

DC(-)

DC(+)

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

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

DC-0(+)

OUT-0

OUT-1

OUT-2

OUT-3

DC-0(+)

RTN OUT-0

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(+)

RTN OUT-0

DC-1(+)

OUT-4

OUT-5

OUT-6

OUT-7

RTN OUT-1

RTN OUT-0

RTN OUT-1

RTN OUT-0

1756-OC8

MODULE B MODULE A

(3)

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).

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).

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)

Fuse holder and Fuse

Figure A

Figure B

(4)

PN-40381

DIR 10000045377 (Version 00)

V. 1492-CM1771-LD008F Conversion Module Specifications

(Operating specifications are when installed in the Conversion System base / cover-plate assembly)

Specification

Dimensions

Approximate Shipping Weight

Storage Temperature -40 to +85°C (-40 to +185°F)

Operating Temperature

0 to 60°C (32 to 140°F)

Operating Humidity

5 to 95% at 60°C (non-condensing)

Shock

Non

operating

Operating

50g

30g

Operating Vibration

2g at 10 to 500Hz (Agrees with 1756 I/O module specifications)

Maximum Operating Voltage

60 Vdc

Max. Module Operating Current

Per Point:

Per Module:

2 Amps

8 Amps

Agency Certifications

UL Classified: Under UL File Number E113724

CSA

CE: compliant for all applicable directives

Pollution Degree

Environmental Rating

IP20

Refer to the Wiring Diagram(s) for

current limits for a specific configuration.

NOTICE

Value

Fusing One, 10 Amps (maximum current based on conversion components)

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)

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).

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

(5)

PN-40381

DIR 10000045377 (Version 00)

Max Slots for I/O

-A1B w/o

-A1B

w/PS

3 6 8 8 69 12

-A13

(5)

-A3B1-A10-A7

(4)

-A2B

w/PS

-A2B w/o

-A7-A4

(3)

-A17

(6)

-A4B

Chassis Width

(2)

Conversion Assembly

Chassis Parameter(1)

1756 Equivalent

Chassis

1756 Equivalent

Chassis

24.01 29.0623.1519.0119.029.01 12.61 10.35 14.49 14.4914.01 17.61

1771 Chassis 1771 Chassis

1771 Chassis

1492-MUA1B-A4-A7 1492-MUA2B-A7-A10 1492-MUA3-A10-A13 1492-MUA4-A13-A17

1771 Chassis 1756 Equivalent

Chassis

1756 Equivalent

Chassis

PN-40381

DIR 10000045377 (Version 00)

Printed in U.S.A.

Conversion Module Compatible 1771

Output Module

Compatible 1756

Output Module

Required 1492 Cable

1492-CM1771-

LD008F

1771-OBD Two

1756-OC8

1492-CONCABS1

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.

WARNING

1492-CONCAB005S1

1492-CM1771-LD008F

Conversion: 1771-OBD to 1756-OC8 Qty. 2 with 1492-CM1771-LD008F

DC(+)

DC(-)

DC(+)

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

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

DC-0(+)

OUT-0

OUT-1

OUT-2

OUT-3

DC-0(+)

RTN OUT-0

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(+)

RTN OUT-0

DC-1(+)

OUT-4

OUT-5

OUT-6

OUT-7

RTN OUT-1

RTN OUT-0

RTN OUT-1

RTN OUT-0

1756-OC8

MODULE B MODULE A

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)

1492-CM1771-LD008F Conversion Module

Conversion Compatibility

and Product I.D. Label

37-Pin Connector for cable

1492-CONCAB

S1

Cable

1492-CONCAB

S1

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