1771-P7 Ser D (PU)

Allen Bradley Bulletin 1771 | External Power Supply

Allen Bradley Bulletin 1771 | AC Power Supply Module, Input 120VAC, Output 5VDC @ 16A, Series D

The Allen-Bradley 1771-P7 is a high-capacity AC power supply module designed for the 1771 Universal I/O platform. It installs directly into any 1771 I/O chassis to provide regulated DC power to the backplane, supporting the operation of PLC-5 processors, remote I/O adapters, and a full range of discrete and analog I/O modules. It is engineered to provide a stable, high-current power foundation for medium-to-large 1771 control systems.

This Series D module accepts a nominal input of 120VAC and efficiently converts it into the precise 5VDC required by the chassis backplane logic. Occupying two slots in a 1771 chassis, the 1771-P7 is a high-density supply capable of delivering a robust 16 Amps of continuous current. This significant power output makes it an ideal choice for chassis populated with high-density digital modules or high-current specialty I/O that exceed the capacity of standard single-slot power supplies.

The 1771-P7 features integrated protection against overvoltage, overcurrent, and thermal overload to ensure the long-term safety of the chassis and all installed components. The front panel includes a power indicator LED that provides immediate visual confirmation of the unit’s operational status. Its rugged design ensures a consistent, high-integrity connection to the backplane, even in environments subject to industrial vibration or mechanical shock.

Built for continuous duty in heavy industrial settings, the module operates reliably across a temperature range of 0–60°C (32–140°F) and non-condensing humidity levels up to 95%. It is designed to withstand the electrical noise and transients common in factory floor environments. The power supply is UL listed, CSA certified, and CE compliant, meeting the rigorous standards for quality and safety required in global industrial automation applications.

Key Specifications:

  - Input Voltage: 120V AC (Nominal)
  - Output Current: 16A @ 5VDC
  - Chassis Space: 2 Slots
  - Function: Backplane Power Supply
  - Platform: 1771 Universal I/O (PLC-5)
  - Series: D