1771-P7 | Allen-Bradley PLC-5 Power Supply Module

Product Overview

The 1771-P7 is an industrial-grade power supply module designed for the Allen-Bradley PLC-5 control system family. It delivers regulated DC power to PLC chassis and modules, ensuring stable operation across a wide voltage range. This unit supports both 120 VAC and 220 VAC nominal inputs, with automatic range selection between 97–132 VAC or 195–264 VAC. Engineered for reliability, the 1771-P7 provides consistent backplane current output and includes integrated fusing for overcurrent protection.

Key Features

• Brand: Allen-Bradley

• Model: 1771-P7

• Product Type: Power Supply Module

• Series: PLC-5

• Input Voltage Range: 97–132 VAC or 195–264 VAC

• Nominal Input Voltage: 120 VAC or 220 VAC

• Input Frequency: 47–63 Hz

• Backplane Output Current: 16 A at 5 VDC

• Maximum Apparent Input Power: 176 VA

• Maximum Real Input Power: 108 W

• Fuse Rating: 3 A, 250 V, Normal-blow type

• Cabling Options: 1771-CP1 (Local), 1771-CP2 (Remote 5 ft), 1771-CP3 (Remote 5 ft)

• Maximum Transformer Load: 270 VA

• Power Dissipation: Low-heat, high-efficiency design

• Paralleling Capability: Not supported

• Mounting Type: Stand-alone installation

• Location: External to chassis or used as a remote power source

• Weight: 1.90 kg (4.19 lbs)

Application Scenarios

The 1771-P7 is designed for use in demanding automation environments requiring reliable and uninterrupted power delivery. Common applications include:

• PLC-5 rack systems: Supplying stable DC power to controller chassis and I/O modules

• Distributed control installations: Serving as a local or remote power source using CP1 or CP2 cabling

• Process control and manufacturing automation: Ensuring steady voltage and current for system integrity

• Legacy equipment maintenance: Providing dependable replacement for existing PLC-5 power units

Performance and Protection

• Fuse Protection: The integrated 3 A, 250 V fuse protects against short circuits and overloads

• Thermal Efficiency: Designed for optimal heat dissipation under continuous load conditions

• Electrical Stability: Maintains consistent voltage output under varying AC input conditions

Compatibility

• System Integration: Fully compatible with Allen-Bradley PLC-5 racks and related modules

• Connection Cables: Supports 1771-CP1, 1771-CP2, and 1771-CP3 connection types for flexible placement

• Installation: Suitable for standalone or remote configuration based on system layout

FAQs

Q: What type of voltage does the 1771-P7 accept?
A: It supports dual-range input voltage—97–132 VAC or 195–264 VAC, selectable automatically.

Q: What is the backplane current capacity?
A: The module delivers up to 16 amperes at 5 volts DC.

Q: Does this module require external DC input?
A: No, the module converts incoming AC power to the necessary DC levels internally.

Q: Is the 1771-P7 suitable for parallel operation?
A: No, this power supply is not designed for parallel configuration.

Q: What cables can be used for connection?
A: The unit is compatible with 1771-CP1 (local), 1771-CP2, and 1771-CP3 (remote) cables.