1771-A1B
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Shipping & Delivery
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Product Conditions
Product Conditions
Surplus: Surplus units show no signs of installation or having been used previously. These units are in the original packaging, which may have been opened.
Used: Used units have been previously used and are inspected, cleaned and tested.
All units come with a 1 Year Replace Industrial Warranty.
Tax & Exemptions
Tax & Exemptions
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Product Conditions
Replace Industrial, LLC is not affiliated with any of the manufacturers listed on this website. All products are sourced & verified through the industrial surplus market and through other independent supply chains. We do not convey any manufacturer warranty with the product. Each product sold comes with a 2 Year Replace Industrial Warranty, unless specified otherwise. This warranty conveys solely through Replace Industrial, LLC. and is completely unaffiliated with any manufacturer warranty. The terms of our warranty can be found here.
Surplus: This unit is sourced through the industrial market outside of the manufacturer and has been independently verified to not have been used operationally previously. These units are in the original packaging, but the packaging & unit may show signs of shelf wear.
Used: This unit may have been previously used and show signs of wear. The unit has been independently verified and is guaranteed with a 1 Year Replace Automation Warranty. The unit has been sourced through independent supply chains in the industrial markets.
Firmware: Replace Industrial, LLC sells hardware only and does not sell firmware and makes no representation as to what firmware may or may not be present on the hardware. We do not obtain or provide software for customers.
Allen-Bradley 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.
| Manufacturer | Rockwell Automation |
| Brand | Allen-Bradley |
| Part Number | 1771-A1B |
| Product Type | I/O Chassis Assembly |
| Series | PLC-5 / 1771 |
| Number of Slots | 5 |
| Mounting | Back-Panel Mount |
| Backplane Voltage | 5.25 VDC |
| Backplane Current | 16 Amps Max |
| Compatible Modules | 1771 I/O Modules, PLC-5 Processors |
| Status | Discontinued by Manufacturer |
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