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Allen Bradley 1771-A4B PLC-3 I/O Chassis

Allen Bradley 1771-A4B 4-slot I/O chassis for PLC-3.

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ManufacturerAllen Bradley

Part number1771-A4B

Chassis Type I/O Chassis

Number of Slots 4

Compatible PLC PLC-3

Module Type 1771 Series I/O Modules

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12-month warranty

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Veteran-owned

CAGE: 9NK75

4 I/O slots PLC-3 compatibility Provides backplane connection Robust construction Supports 1771 I/O modules Essential for system expansion

Product description

The Allen Bradley 1771-A4B is a 4-slot I/O chassis designed for the PLC-3 family of programmable logic controllers. This chassis provides the backplane and power distribution necessary to connect various 1771 I/O modules to the PLC-3 processor. It is a fundamental component for building a PLC-3 system with the required input and output points.

This chassis is typically used in legacy automation systems within industries such as manufacturing, automotive, and material handling where PLC-3 controllers are still in operation. It's essential for expanding the I/O capabilities of existing PLC-3 installations.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the 1771-A4B chassis to support maintenance and upgrades of PLC-3 systems. We ensure you can find the necessary components to keep your older automation infrastructure running efficiently.

Technical specifications

Chassis Type	I/O Chassis
Number of Slots	4
Compatible PLC	PLC-3
Module Type	1771 Series I/O Modules

Common applications

Legacy Automation Systems

PLC-3 Installations

Manufacturing

Automotive

Material Handling

Process Control

Industrial Plants

Compatible systems

Allen Bradley PLC-3 Processors 1771 Series I/O Modules

Also known as

1771A4B, AB 1771-A4B, Allen Bradley PLC Chassis, PLC-3 I/O Rack

Replaces / compatible with

The 1771-A4B is a 4-slot I/O chassis for the Allen Bradley PLC-3 system. It serves as the foundational rack for connecting 1771 series I/O modules to the PLC-3 processor.

Technical note

Expert tip

Ensure the correct 1771 series power supply (e.g., 1771-P1, 1771-P2) is installed in the chassis to power the I/O modules and backplane.

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Frequently asked questions

What type of I/O modules can be used with the Allen Bradley 1771-A4B chassis?

The Allen Bradley 1771-A4B chassis is specifically designed to accommodate the 1771 series of I/O modules. These include a wide range of digital and analog input/output modules for the PLC-3 system.