1771-P10 Allen-Bradley PLC-5 DC Power Supply 125V Module

Overview

The Allen-Bradley 1771-P10 is a PLC-5 chassis power supply designed for DC input operation within the 1771 I/O platform. It converts 125 V DC input power into regulated 5 V DC backplane voltage, supporting processor and I/O module operation in rack-based control systems. The module requires two chassis slots and is commonly used in legacy DC-powered PLC installations.

Input Electrical Specifications

• Nominal Input Voltage: 125 V DC

• Operating Range: 97–145 V DC

• Input Type: DC or rectified supply source

• Maximum Real Input Power: 51 W

• Designed for stable operation across fluctuating DC bus conditions

• Suitable for industrial environments using centralized DC distribution

Output Characteristics

• Backplane Output Voltage: 5 V DC regulated

• Output Current Capacity: 8 A

• Provides regulated power to PLC-5 processors and 1771 I/O modules

• Ensures stable backplane communication and module synchronization

Protection & Electrical Design

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

• Internal protection for overload and transient conditions

• Designed for continuous-duty industrial control operation

System Integration

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

• Occupies two slots in the 1771 rack assembly

• Requires 1771-CT interconnect cabling

• Supports parallel configuration with compatible -P5 and -P10 power modules

• Intended for legacy DC-powered control architectures

Thermal & Environmental Ratings

• Operating Temperature: 0 to 60°C (32 to 140°F)

• Storage Temperature: -40 to 85°C

• Engineered for cabinet-mounted industrial environments with controlled ventilation

Physical Characteristics

• Weight: 2.25 lbs

• Rugged chassis-mounted construction for PLC rack installation

Engineering Notes

• Designed specifically for DC input PLC-5 systems, not AC variants

• Requires proper DC supply regulation to avoid input fluctuation issues

• Two-slot footprint should be considered during chassis layout planning

• Ensure correct grounding for noise immunity in high-load environments

Applications

• Legacy PLC-5 DC-powered control systems

• Industrial automation retrofit projects

• Process control cabinets with centralized DC distribution

• Manufacturing equipment requiring stable backplane power

• Power system modernization support for 1771 chassis

FAQ

Q1: Can this module operate on AC input?
No, 1771-P10 is designed strictly for DC input operation.

Q2: How many chassis slots does it require?
It occupies two slots in the 1771 PLC chassis.

Q3: Is it compatible with other PLC platforms?
It is intended for PLC-5 / 1771 systems only.