| Brand | Allen-Bradley |
| Series | PLC-5 / 1771 |
| Status | Discontinued by Manufacturer |
| Mounting | Back-Panel Mount |
| Part Number | 1771-A1B |
| Manufacturer | Rockwell Automation |
| Product Type | I/O Chassis Assembly |
| Number of Slots | 5 |
| Backplane Current | 16 Amps Max |
| Backplane Voltage | 5.25 VDC |
| Compatible Modules | 1771 I/O Modules, PLC-5 Processors |
Does the Allen-Bradley 1771-A1B come with a warranty?
Yes. The 1771-A1B 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-A1B a genuine Allen-Bradley part?
The 1771-A1B 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-A1B new or used?
We offer the 1771-A1B 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-A1B?
The 1771-A1B is an Allen-Bradley PLC-5 I/O Chassis Assembly.
How fast does the 1771-A1B ship?
In-stock orders for the 1771-A1B 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-A1B
The Allen-Bradley 1771-A1B is a compact 5-slot I/O chassis assembly from the PLC-5 series, designed for smaller-scale automation systems or applications with limited panel space. It supports up to five 1771-series I/O modules or one PLC-5 processor, delivering a reliable 5.25 VDC backplane voltage with a current capacity of up to 16 Amps. Ideal for modular control setups, the 1771-A1B provides consistent communication across all installed modules and is built for panel mounting. Though discontinued, it remains a dependable choice in legacy PLC-5 control systems.
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.
