Allen-Bradley 1771-ASBK PLC-5 Universal Remote I/O Adapter Module

Product Overview

The 1771-ASBK functions as a high-performance Universal Remote I/O (RIO) Adapter module for the Allen-Bradley PLC-5 system. This module interfaces 1771 I/O chassis with a remote scanner over a RIO link, enabling distributed control across large-scale industrial facilities. The "K" suffix designates a Conformal Coated PCB, providing superior protection against humidity, salt spray, and chemical contaminants. We supply this unit as 100% Brand New and factory-original, ensuring the highest level of signal integrity for legacy infrastructure maintenance.

Part Number Breakdown

The 1771-ASB series follows a specific nomenclature to identify environmental hardening:

• 1771-ASB: Standard Universal Remote I/O Adapter module.

• 1771-ASBK: Includes a specialized Conformal Coating layer on the internal circuitry to prevent corrosion and dendritic growth in harsh atmospheres.

Technical Specifications

The 1771-ASBK manages data transmission between the backplane and the RIO scanner at multiple switch-selectable baud rates.

Engineering Advantages

• Hardened Chemical Resistance: The conformal coating shields delicate traces and solder joints from corrosive gases and moisture. This effectively eliminates the risk of short circuits and premature board failure in wastewater treatment plants, paper mills, and chemical processing facilities.

• Flexible Network Scaling: The module supports three distinct communication rates. Engineers can optimize the RIO link for distance (up to 10,000 feet at 57.6k) or for high-speed data throughput at 230.4k, providing versatile architecture options for distributed I/O.

• Diagnostic Precision: Onboard status indicators immediately identify link errors and adapter faults. This reduces troubleshooting time by allowing technicians to distinguish between a physical cable break (Belden 9463) and a logic-side configuration error.

• Zero-Footprint Integration: The 1771-ASBK slides into the leftmost slot of any 1771 Universal I/O chassis. It handles all backplane communications without requiring a local processor, significantly reducing hardware costs for remote monitoring stations.

FAQs

• Can I use the 1771-ASBK to replace a standard 1771-ASB?

  Yes. The 1771-ASBK remains 100% backward compatible with the standard 1771-ASB. It utilizes the same wiring arm (1771-WB) and configuration dip switches while offering the added benefit of conformal coating.

• What cable type does this module require?

  The module requires Belden 9463 "Blue Hose" twinaxial cable. Using unauthorized or lower-shielded cables will introduce electrical noise and cause intermittent communication drops on the RIO link.

• How do I set the baud rate and rack address?

  You must configure the baud rate and the starting rack address via the dip switches located on the side of the module before installation. Refer to your system manual to ensure the settings match your scanner's configuration.

• Is this a refurbished or used unit?

  No. We guarantee this 1771-ASBK is 100% Brand New in its original factory packaging. This is critical for conformal coated modules, as used units often suffer from compromised coatings due to previous handling or field exposure.