Allen-Bradley 1492-CM1771-LD001 1492 I/O Wiring Conversion System Swing-Arm Conversion Module

Allen-Bradley 1492-CM1771-LD001 1492 I/O Wiring Conversion System Swing-Arm Conversion Module The Allen-Bradley 1492-CM1771-LD001, also cataloged as the 1492-CM1771-LD001 swing-arm conversion module, operates as a dedicated hardware component for PLC-5 to ControlLogix digital input migration within Allen-Bradley ControlLogix conversion systems. The module maintains existing 1771 swing-arm field terminations while redirecting signal paths toward 1756-series removable terminal block interfaces. Hardware Specifications Parameter Specification Model 1492-CM1771-LD001 Brand Allen-Bradley Origin United States Product Type Swing-Arm Conversion Module Series 1492 I/O Wiring Conversion System Compatible Legacy Modules 1771-IAD, 1771-IBD Compatible ControlLogix Modules 1756-IA16, 1756-IB16 Conversion Type Swing-arm conversion using existing field wiring Installation Method Conversion mounting assembly Wiring Method Pre-wired 1492 conversion cables Operating Temp 0 deg C to +60 deg C Storage Temp -40 deg C to +85 deg C Relative Humidity 5% to 95% non-condensing Pollution Degree 2 Certifications CE, UL, C-UL-US, FM Weight Approx. 0.44 lbs Dimensions Not specified Power Consumption Passive conversion module; no internal power consumption Lifecycle Status Active EtherNet/IP Migration and I/O Density Scaling The 1492-CM1771-LD001 supports staged PLC platform migration where legacy 1771 field wiring assemblies remain mechanically intact during transition to ControlLogix architectures. By preserving original swing-arm terminations, the module reduces cabinet rework activity and minimizes conductor identification errors during I/O replacement procedures. The conversion assembly is designed for compatibility with high-density 1756 digital input modules while maintaining original field conductor allocation. Signal continuity depends on correct mating between the conversion module, pre-wired 1492 interface cable, and associated removable terminal block assembly. Installation sequencing should maintain channel mapping consistency between the legacy PLC-5 addressing structure and the target ControlLogix slot configuration. Frequently Asked Questions Q: Does the 1492-CM1771-LD001 require field rewiring during migration? A: No. The module is designed to retain the existing 1771 swing-arm field terminations while redirecting the I/O connection through the conversion assembly and pre-wired interface cable. Q: Can the conversion module be installed while the PLC chassis remains energized? A: Standard industrial practice is to isolate rack and field power before removing or inserting swing-arm assemblies to prevent unintended input state transitions or connector arcing. Q: Does the module perform signal conversion or electrical isolation? A: No active signal conditioning or isolation circuitry is specified. The assembly functions as a passive physical conversion interface between compatible legacy and ControlLogix I/O hardware. Field Installation Guidelines Verify compatibility between the installed 1771 input module and the target 1756 module before mounting the conversion assembly. Maintain original field wire identification labels during migration to preserve input channel traceability. Route pre-wired 1492 interface cables separately from motor feeder and VFD output conductors to reduce induced electrical noise. Inspect swing-arm contacts for oxidation, deformation, or looseness before reuse in the conversion assembly. Confirm removable terminal block seating and connector latch engagement before energizing the ControlLogix rack. Perform point-to-point input verification after commissioning to validate channel mapping integrity between legacy and converted hardware.