Allen-Bradley 1771-P2 | PLC5 Auxiliary Power Supply

Product Overview

The 1771-P2 by Allen-Bradley is an auxiliary power supply designed to energize a single 1771 I/O chassis with an installed adapter module. It operates with nominal input voltages of 120 VAC at 0.75 A or 220/240 VAC at 0.38 A, delivering a maximum real input power of 65 W under full load.

This module ensures stable 5 V DC output for logic circuitry and memory, supporting efficient PLC5 system operation. The 1771-P2 features a fast power loss response time of 13.5 ms ±2.5 ms, providing reliable protection for connected processors.

Fuse protection is included and varies depending on the input voltage: 1 A slow-blow for 120 V AC, and 0.5 A for 220-240 V AC. Isolation voltages reach 2500 V DC and 1800 V RMS for one millisecond, ensuring electrical safety in industrial environments.

Technical Specifications

Features and Benefits

• Dual Voltage Operation: Supports 120 V AC or 220-240 V AC with selectable fusing.

• Stable DC Output: Provides 6.5 A at 5 V DC for logic and memory circuits.

• Fast Response: Power loss delay ensures processor protection within 13.5 ms.

• Electrical Safety: High isolation voltage protects equipment from transients.

• Compatibility: Works with one 1771 I/O chassis and optional parallel supplies.

Applications

• Industrial PLC5 automation systems requiring auxiliary power.

• Medium- to large-scale process control applications.

• I/O chassis powering in manufacturing and processing environments.

FAQ

Q1: What input voltages does the 1771-P2 support?
It supports 120 V AC at 0.75 A or 220/240 V AC at 0.38 A.

Q2: What is the maximum DC output?
The module provides 6.5 A at 5 V DC.

Q3: Can it be paralleled with other supplies?
Yes, it can work with the 1771-P10 parallel power supply.

Q4: What fuse is required for 220-240 V AC operation?
Use a 0.5 A fuse for 220-240 V AC input.

Q5: What is the operating temperature range?
The module operates between 0 and 60 °C (32–140 °F).