Allen Bradley PLC-5 1771-A3B1 | 12-Slot I/O Chassis

Product Description

The Allen Bradley PLC-5 1771-A3B1 I/O Chassis is a heavy-duty backplane designed to support up to twelve I/O modules in PLC-5 control systems. With high current capacity, robust mechanical endurance, and open-style construction, it is ideal for large-scale automation environments requiring reliable module housing and stable operation.

Technical Specifications

• Model / Part Number 1771-A3B1

• Manufacturer Allen Bradley (Rockwell Automation)

• Product Line PLC-5 Series

• Product Type I/O Chassis

• Weight 12.44 lbs (5.64 kg)

• Number of Slots 12 module slots

• Backplane Current Capacity 24 A at 5 VDC

• Mounting Method Panel mount installation

• Enclosure Type Open style

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

• Relative Humidity 5–95% non-condensing

• Shock Resistance

• Operating: 15 g

• Non-operating: 30 g

• Vibration Resistance 2 g (10–500 Hz)

• Location Standalone use

Application Scenarios

• Large-scale PLC-5 automation systems requiring multiple I/O modules

• Industrial environments with high vibration and shock exposure

• Standalone installations needing robust panel-mounted chassis

FAQ

Q: How many slots does the 1771-A3B1 chassis provide?  A: It supports up to 12 I/O modules.

Q: What is the maximum backplane current capacity?  A: 24 A at 5 VDC.

Q: What type of mounting is supported?  A: Panel mount installation.

Q: What environments is it suitable for?  A: It is designed for standalone use in industrial automation systems with vibration and shock resistance.

Comparison with Similar Models

• 1771-A1B: 4-slot chassis, 16 A backplane current, compact design

• 1771-A2B: 8-slot chassis, mid-range expansion capability

• 1771-A3B1: 12-slot chassis, 24 A backplane current, extended expansion