1756-CPR2 | Allen-Bradley ControlLogix Redundant Power Supply Cable

Product Overview

The Allen-Bradley 1756-CPR2 serves as the critical link in ControlLogix redundant power architectures. This specialized cable connects two 1756-PA75R or 1756-PAR2 power supply units, enabling real-time synchronization and internal communication. By linking the power supplies, the system maintains continuous operation even if the primary unit fails. This component ensures your ControlLogix chassis receives uninterrupted power, making it essential for high-availability applications in data centers, manufacturing, and critical infrastructure. We supply this item as a 100% Brand New, factory-sealed unit.

Technical Specifications

Engineering Advantages

Solves Synchronization Latency
Standard power cables cannot handle the communication load required for redundancy. The 1756-CPR2 utilizes shielded twisted-pair wiring to transmit synchronization signals instantly between power supplies. This design eliminates switching delays during a fault, preventing chassis resets or processor trips.

Engineered for Industrial Noise Immunity
Industrial environments generate significant electromagnetic interference (EMI). This cable features robust shielding that protects the redundancy signal from EMI generated by nearby motor drives or high-voltage lines. You maintain a stable connection even in electrically noisy panels.

Optimized Physical Design
The 0.91m (3ft) length offers the ideal reach for standard control cabinets. It connects power supplies mounted in the same chassis or adjacent slots without creating slack that obstructs airflow. The connectors lock securely into the power supply interface, resisting vibration-induced disconnections common in heavy machinery applications.

FAQs

Q: Which power supply models require the 1756-CPR2 cable?
A: You must use this cable when setting up a redundant pair using 1756-PA75R or 1756-PAR2 power supplies. It connects the two units to enable the redundancy handshake.

Q: Can I extend the 1756-CPR2 cable if my power supplies are far apart?
A: No. The 1756-CPR2 is a pre-terminated assembly designed for a specific impedance and signal timing. Extending it with standard wire or couplers disrupts the synchronization signal and voids the redundancy guarantee.

Q: Does this cable come with the power supplies?
A: This listing is for the 1756-CPR2 cable only. Redundant power kits (like the 1756-PAR2 bundle) may include these cables, but standalone purchases require you to buy the cable separately to complete the redundant pair installation.