Field Wire Conversion Module for A-B 1771-OAD to 1756-OA16 or
1771-OBD to 1756-OB16E
(Cat 1492-CM1771-LD006)
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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 connec-
tor 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.
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
This is cable length in meters. Available lengths are limited to 005 (0.5m) and 010 (1.0m).
Conversion Module
Compatible 1771
Output Module
Compatible 1756
Output Module
Required 1492 Cable
1492-CM1771-LD006
1771-OAD
1756-OA16
1492-CONCAB
X
1492-CM1771-LD006
1771-OBD
1756-OB16E
1492-CONCAB
X
PN-40379
DIR 10000045375
(Version 00)
Printed in U.S.A.
Conversion Compatibility and
Product I.D. Label
25-Pin Connector for cable 1492-CONCAB
X
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-LD006 Conversion Module
Refer to conversion module Specifications Section: Maximum Operating Voltage