Allen-Bradley 1771-A1B

Allen-Bradley 1771-A1B | 4-Slot Universal I/O Chassis for PLC-5 Systems

Overview

The Allen-Bradley 1771-A1B is a 4-slot I/O chassis designed for use with PLC-5 controllers and 1771 I/O modules. It features a universal backplane that supports both digital and analog modules, and is ideal for small-scale automation systems or for expanding existing PLC-5 networks. Compatible with a variety of 120/240V AC and 24V DC power supplies, the chassis allows for flexible, modular installation in industrial control panels.

Key Features

• Slots: 4 available I/O slots

• Compatibility: Supports all 1771 series I/O modules and PLC-5 processors

• Backplane: Universal I/O backplane

• Mounting: Panel mount or DIN rail

• Power Supply: Compatible with separately mounted 1771-Px power supplies

• Chassis Power Distribution: Backplane-powered from external PSU

• Expansion: Can be used as a local or remote I/O rack

Technical Specifications

• Catalog Number: 1771-A1B

• Backplane Current: As required per installed modules

• Operating Temperature: 0°C to 60°C

• Storage Temperature: -40°C to 85°C

• Certifications: UL, CSA, CE

• Dimensions (HxWxD): Approx. 290 x 100 x 180 mm

Applications

• Legacy Allen-Bradley PLC-5 systems

• Distributed I/O in process automation

• Industrial control panels and OEM machines

• Expansion racks for existing 1771-based installations

• Manufacturing, utility, and infrastructure automation

Why Choose the 1771-A1B?

• Compact 4-Slot Design for Small Systems or Expansion

• Universal Backplane for Analog and Digital I/O

• Seamless Integration with PLC-5 Architecture

• Proven Allen-Bradley Reliability in Harsh Environments

Order Now

The Allen-Bradley 1771-A1B chassis is in stock and available for immediate worldwide delivery.