Allen Bradley 1771-A4B 16-Slot I/O Chassis

Overview

The Allen Bradley 1771-A4B is a 16-slot I/O chassis designed for PLC-5 and 1771 series control systems. It provides a high-capacity mounting and backplane platform for multiple I/O modules, enabling large-scale industrial automation systems with expanded input and output requirements. It is widely used in complex manufacturing and process control environments.

General Information

Part Number: 1771-A4B

Manufacturer: Allen-Bradley (Rockwell Automation)

Brand: Allen-Bradley

Country of Origin: USA

Series: 1771 I/O System / PLC-5

Product Type: I/O Chassis

Mounting Type: Panel or rack mounting within industrial control cabinet

Function: Provides mechanical housing, power distribution, and backplane communication for I/O modules

Design: High-density modular chassis for large automation systems

Power Specifications

Input Power: Supplied via external power supply

Backplane Voltage: PLC-5 1771 system architecture dependent

Power Distribution: Internal backplane distributes power across all slots

Protection: Industrial grounding and electrical isolation design

Start-Up: Sequential system initialization via PLC controller

Communication & Interface

Interface Type: 1771 backplane communication bus

Slot Capacity: 16 I/O module slots

System Compatibility: PLC-5 and 1771 series I/O modules

Data Handling: Parallel backplane communication between modules and processor

Diagnostics: System-level fault and status monitoring via controller

Environmental

Operating Temperature: 0 to 60 °C

Storage Temperature: -40 to 85 °C

Humidity: 5% to 95% non-condensing

Vibration Resistance: Industrial cabinet installation standard

Protection Rating: IP20 when installed in enclosure

Installation Environment: Industrial control cabinet required

Dimensions & Weight

Dimensions (H × W × D): 610 × 315 × 193 mm

Weight: 6.7 kg

HIGH DENSITY – IN STOCK, READY TO SHIP