Allen-Bradley 1771-A3B PLC-5

Allen-Bradley 1771-A3B PLC-5. NJT Automation sources the 1771-A3B on request; send the part number for a replacement or repair quote.

Quote required. Request a quote below for pricing and delivery.

Allen-Bradley 1771-A3B PLC-5 – placeholder graphic, no product photograph on file

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Part Number	1771-A3B
Price	On Request Availability and condition determine final quote.
Description	Allen-Bradley 1771-A3B PLC-5. PLC-5 I/O Chassis Assembly 12 Slot, 19-inch Rack Mountable.
Shipping	UPS Ground included \| Next-Day Air and Worldwide Shipping available at checkout
Warranty	1-year full-function warranty provided by NJT Automation. Warranty details Included 1 year, full-function 2 years +15% of product price 3 years +25% of product price View full warranty policy
Returns	90-day free returns. View return policy
Exchange	Send us your defective 1771-A3B after your purchase for a 10% core credit. We also purchase old or damaged parts outright.

Availability

Sourced on request

We do not have a 1771-A3B on the shelf right now. We can source one through our supplier network; request a quote and we confirm availability, price and lead time before you commit.

Sourcing

Sourced through our Level 1 network of vetted US suppliers. Each unit is checked before it ships and carries the same NJT warranty and return policy as our own stock. Quotes within one hour during business hours; typical delivery 3–5 business days, next-day air available. Sourced parts are not available for local pickup.

Request Quote How Level 1 sourcing works

Intended Use

Intended for PLC-5 rack-mount applications. The chassis is the backplane for a PLC-5 local or remote I/O rack, sized by slot count to the modules a process area needs.

Migration Path

Rockwell Automation has discontinued 1771 I/O along with the PLC-5 platform. Published successor for the 1771 I/O: the equivalent ControlLogix 1756 I/O module.

Under a ControlLogix controller, the existing 1771 rack can stay in service as Remote I/O through a 1756-RIO scanner while modules are converted.
The 1492 conversion wiring system (1492-CM1771 modules and pre-wired cables) lands the existing 1771 swing-arm wiring on the new 1756 module without touching field devices.
Rebuild the I/O tree in Studio 5000; 1756-RM085 covers how PLC-5 I/O addressing maps to Logix tags.

A like-for-like replacement or a repair keeps the existing program, wiring and panel layout; a migration is a project. Both are listed on this page so the choice can be made on lead time and budget.

Allen Bradley Information

Allen Bradley 1771-A3B I/O Chassis 12-slot chassis for 1771 I/O modules, designed for PLC-5 systems.

Technical SpecificationsLifecycle status

Lifecycle	Discontinued Verify current status with the manufacturer.

Still have questions?

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Frequently Asked Questions

What condition is the 1771-A3B in?

The 1771-A3B may be available on request in Unused surplus / Refurbished / Used condition. We can quote this part in unused surplus, refurbished, or used condition depending on availability and your preference. Specify your requirement in the RFQ.

When does this part ship?

The 1771-A3B is sourced on request. Request a quote and we'll confirm availability and lead time, typically a few business days.