Allen-Bradley 1771-CP2 PLC-5 Power Supply Cable

The 1771-CP2 is a 5-foot (1.52-meter) interconnecting power supply cable manufactured by Allen-Bradley for the PLC-5 system architecture. It is designed to deliver power from a remote, panel-mounted 1771-P7 AC power supply module directly to a rack-mounted 1771 I/O chassis, such as the 1771-A1B, A2B, A3B, or A4B. Featuring dual D-sub connectors with captive retaining screws, the cable provides a secure electrical connection capable of routing DC backplane power across industrial enclosures.

Mechanical Construction and Enclosure Routing

Constructed with a heavy-duty outer jacket and conformal coating, the cable resists wear, chemical exposure, and moisture in harsh control panel environments. Its flexible conductor design accommodates tight bending radii without placing mechanical strain on the internal wire strands or chassis connectors. The 5-foot (1.52-meter) length allows control engineers to mount the high-output 1771-P7 power supply above or adjacent to the I/O chassis to manage convection thermal dissipation while maintaining clean cabinet wire routing.

Power Delivery and Installation Requirements

The cable serves as the primary conduit for regulated DC voltage supplied to the 1771 chassis backplane. Dual D-shell connectors line up with the backplane power input port on compatible 1771 chassis shells. Built-in mounting screws thread directly into the host chassis and power supply housing, ensuring the connector maintains continuous pin contact despite panel vibration or thermal expansion.

Specifications

Frequently Asked Questions

Q: What is the primary function of the Allen-Bradley 1771-CP2 cable? A: The 1771-CP2 connects a remotely mounted 1771-P7 power supply to a 1771-A1B, A2B, A3B, or A4B PLC-5 I/O chassis to supply backplane power across a 5-foot distance.

Q: How does the 1771-CP2 differ from the 1771-CP1 power cable? A: The 1771-CP2 measures 5 feet (1.52 m) in length for remote power supply mounting, whereas the 1771-CP1 is a shorter 1.04-foot (0.32 m) cable used when the 1771-P7 power supply is mounted directly adjacent to the chassis.

Q: How are the cable connectors secured to the chassis and power supply? A: Each D-sub connector end is equipped with integrated retaining screws that thread directly into the mating receptacles on the 1771-P7 and I/O chassis, preventing accidental disconnects caused by cabinet vibration.