| Brand | Allen-Bradley |
| Series | PLC‑5 / 1771 |
| Status | Discontinued by Manufacturer |
| Backplane | 1771 I/O Backplane Communication |
| Part Number | 1771-A4B |
| Manufacturer | Rockwell Automation |
| Product Type | I/O Chassis Assembly |
| Compatibility | 1771 Series I/O Modules, PLC‑5 Processors |
| Mounting Type | Back-Panel Mount |
| Number of Slots | 16 |
Does the Allen-Bradley 1771-A4B come with a warranty?
Yes. The 1771-A4B is backed by our 24-Month Replace Industrial Warranty, with no rush fees or hidden warranty charges. If a unit fails under normal use within the warranty period, we repair or replace it.
Is this 1771-A4B a genuine Allen-Bradley part?
The 1771-A4B is sourced and verified independently. Replace Industrial, LLC is not a Rockwell Automation Authorized Distributor, and all warranties are provided directly by Replace Industrial.
Is the Allen-Bradley 1771-A4B new or used?
We offer the 1771-A4B in multiple conditions, from unused surplus to professionally reconditioned units. Every option is sourced and verified independently and covered by our 2-year replacement warranty.
What is the Allen-Bradley 1771-A4B?
The 1771-A4B is an Allen-Bradley PLC-5 I/O Chassis Assembly.
How fast does the 1771-A4B ship?
In-stock orders for the 1771-A4B ship the same day when placed before our daily cutoff. Expedited and same-day air options are available if you are facing downtime, with no rush fees. Our team is based in Raleigh, North Carolina.
1771-A4B
The Allen-Bradley 1771-A4B is a 16-slot I/O chassis assembly designed for use with PLC-5 systems. As part of the 1771 I/O series, this back-panel mounted chassis provides modular flexibility and scalability for industrial control applications. It accommodates various 1771 series I/O modules, communication adapters, and power supplies, allowing users to configure systems tailored to their specific needs. The 1771-A4B supports backplane communication between modules and ensures secure, organized installation in panel-based control enclosures. Known for its robust construction and long-standing reliability, it is ideal for legacy Allen-Bradley PLC installations.
All products are covered by our 2-Year (24-Month) Replace Industrial Warranty. If a unit is found defective under normal use within the warranty period, we repair or replace it at no additional cost, and a unit may be returned for a full refund within 30 days if returned in the same condition it was sent.
Replace Industrial is an independent distributor and does not convey the manufacturer's warranty; all warranties are provided by Replace Industrial alone. Read the full warranty policy
We repair a wide range of industrial automation equipment, including PLCs, HMIs, drives, servo motors, switches, and circuit breakers, with rush service for critical downtime. Request a quote, ship your unit, and we diagnose, repair, and return it. Request a repair quote
Our standard shipping method is UPS Ground. We can also ship on your FEDEX or DHL account.
We can ship many items our the same day via Overnight or 2 Day Shipping.
We currently only collect tax from customers in the state of North Carolina. If you are exempt on your purchase, please email your Sales Tax & Use Exemption Form to sales@replacenc.com.
If you are checking out via a quote we send you, there is an option to upload your form at the time of purchase.
If you have already placed an order, please send us your form and we can refund the charged taxes.
