OVERVIEW

Official designation: Allen-Bradley 1775-CM (PLC-3, Memory Communication Cable Assembly)

Role/Application: This cable assembly connects two 1775-MX Memory Communication Modules, facilitating high-speed data table and program transfer between primary and backup PLC-3 processors for system redundancy.

KEY SPECS SUMMARY

Power: N/A (Passive cable)

Interfaces / Ports: Connects 1775-MX modules

Indicators: N/A

Operating Temp: 0 to 60 degrees C

Platform / Compatibility: PLC-3 processor backup system

Limit: Includes two 30-foot cables

Lifecycle: Discontinued/Obsolete

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What are the physical specifications for the Allen-Bradley 1775-CM cable assembly?

A: The assembly typically consists of two cables, each with a maximum length of 30 feet, designed for data transfer.

Wiring & Installation:

Q: What are the primary modules connected by the 1775-CM cable assembly in a PLC-3 system?

A: The cable connects two 1775-MX Memory Communication Modules, one for the primary and one for the backup processor.

Troubleshooting & Compatibility:

Q: What function does the 1775-CM cable enable to ensure system reliability in PLC-3 applications?

A: It enables high-speed data transfer between redundant PLC-3 processors to ensure quick and reliable switchover.

Replacement & Upgrades:

Q: What is the recommended modern platform for users migrating from the obsolete PLC-3 system?

A: The recommended upgrade path for the PLC-3 is migration to the modern Allen-Bradley ControlLogix automation platform.