1771-P6S Allen-Bradley PLC-5 Power Supply 220V AC Module

Overview

The Allen-Bradley 1771-P6S is a chassis-mounted power supply designed for the PLC-5 and 1771 I/O platform. It converts incoming AC line power into regulated 5 V DC backplane power for system modules, and is typically used in rack-based PLC configurations as a primary or auxiliary supply unit.

Input Power Specifications

• Nominal Input Voltage: 220 V AC

• Operating Voltage Range: 194–264 V AC

• Frequency Range: 47–63 Hz

• Max Real Power Consumption: 56 W

• Apparent Power Rating: 89 VA

• Transformer Load Capacity: Up to 140 VA

• Designed for industrial AC mains environments with wide voltage tolerance

Output Characteristics

• Backplane Output Voltage: 5 V DC regulated

• Maximum Backplane Current: 8 A

• Provides distributed power to 1771 chassis I/O and processor modules

• Stable DC regulation for PLC logic and communication backplane integrity

Protection & Electrical Design

• Fuse Rating: 1.5 A, 250 V AC, time-delay (slow-blow)

• Built-in protection for inrush current and overload conditions

• Designed for continuous duty in PLC rack environments

System Integration

• Compatible with Allen-Bradley PLC-5 systems and 1771 chassis architecture

• Requires 1771-CT cabling for proper system connection

• Supports parallel power supply configurations (suffix variants -P6S, -LWP, -LZP, -LXP depending on system design)

• Occupies a single slot in the 1771 rack

Physical Characteristics

• Weight: 1.88 lbs

• Rugged rack-mounted industrial construction for control cabinet installation

Engineering Notes

• Intended for legacy PLC-5 systems requiring 5 V DC backplane power

• Not designed for modern ControlLogix architecture

• Ensure proper grounding and ventilation in rack installation

• Verify load distribution when used in multi-supply configurations

Applications

• PLC-5 control systems power distribution

• Industrial machine control cabinets

• Retrofit support for legacy Allen-Bradley 1771 platforms

• Manufacturing line control racks

• Process automation legacy system maintenance

FAQ

Q1: Can this module be used as the only power supply in a rack?
Yes, it can serve as a primary or auxiliary supply depending on system load requirements.

Q2: Does it support modern ControlLogix systems?
No, it is designed specifically for PLC-5 / 1771 chassis architecture.

Q3: What cable is required for installation?
The system requires the Allen-Bradley 1771-CT connection cable.