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Allen-Bradley 1771-A4B I/O Chassis 5.25V DC

$2,400.00 USD

Sale Sold out

ConditionSurplus - Untested MPN1771-A4B Stock #0526-02525

Photos reflect current condition. Items differing from description may be eligible for return or refund — see our condition guide.

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Estimated package weight: 20.0 lbs

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The Allen-Bradley 1771-A4B is a 16-slot universal I/O chassis designed for use with the PLC-5 family of programmable controllers. Catalog number 1771-A4B, Series A, part number 966494-01. The chassis provides a 5 volt backplane rated at 24.0 A max at 5.25 VDC max, with a memory line rated at 0.50 A max at 5.25 VDC max. Rated for Class 1, Division 2, Groups A, B, C, D, Temperature Code T6 hazardous environments per nameplate. UL Listed and CSA certified. The unit accommodates Allen-Bradley 1771-series I/O modules across 16 module slots, supporting a wide range of digital and analog I/O configurations within PLC-5 control systems. The left-most slot is reserved for an I/O adapter module or processor. Manufactured in Canada. Date code 9023, Code 3: 43. Internal PCB part number 960152-02FT30, date code CDN9022. Original product documentation (Publication 1771-2.49C, November 1988) is included with the unit. Chassis is intact with all module retaining clips present. Compatible replacement chassis for legacy Allen-Bradley PLC-5 systems requiring 16-slot capacity. Discontinued by manufacturer; sourced from industrial surplus.

Stock # 0526-02525

Please Note: This unit is surplus inventory, sold as-is from MRO Exchange surplus stock. Allen-Bradley is a trademark of Rockwell Automation, Inc. MRO Exchange is an independent reseller and is not an authorized distributor of Rockwell Automation. Product may differ from units available through authorized distributors in date code, country of origin, packaging, accessories, or firmware revision. The warranty from the manufacturer does not apply.

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Shipping & Handling

Most orders ship within 1–2 business days via UPS, but expedited same-day handling is available as an add-on to orders in cart. Larger equipment ships via freight carrier. Use the shipping estimator above for a location-specific quote. Local pickup is also available at our Fairfield, IL facility, typically ready within 4 hours.

Returns & Condition

All items are sold as-described based on the photos and condition listed. If an item arrives differing from its description, it may be eligible for return or refund. See our full condition guide for details on our grading terms.

Payment Options

We accept all major credit cards, PayPal, and Shop Pay. Purchase order and wire transfer payment is also available by selecting "Purchase Order / Wire Transfer" at checkout. Payment is due prior to shipment. Contact us for custom terms on established accounts. Tax exemptions are honored if proper documentation is provided.