1747-ASB | Allen-Bradley | SLC 500 Remote I/O Adapter Module

Product Description

The 1747-ASB is a high-performance communication interface designed to integrate SLC 500 I/O chassis into a Universal Remote I/O (RIO) network. By acting as a remote terminal, this module allows a master controller—such as a PLC-5 or another SLC 500 with a scanner—to monitor and control I/O modules located in remote racks over long distances.

The 1747-ASB (Ser A/B/C) occupies a single slot in the SLC chassis (typically the leftmost slot) and manages all communication between the backplane and the RIO link. It supports flexible addressing modes, including discrete and block transfer operations, ensuring high-speed data exchange for distributed control architectures.

Detailed Technical Specifications

• Model Number: 1747-ASB

• Brand: Allen-Bradley / Rockwell Automation

• Module Type: Universal Remote I/O (RIO) Adapter

• Communication Rates: 57.6 kbps, 115.2 kbps, or 230.4 kbps

• Backplane Current Draw: 375 mA at 5V DC

• Connection Interface: 6-Pin Phoenix Terminal Connector

• Link Cable Type: Belden 9463 (Blue Hose) or equivalent

• Chassis Capacity: Supports up to 30 I/O slots across a local rack and interconnected expansion racks

• Node Capacity: 16 nodes (standard) or up to 32 nodes (extended)

• Status Indicators: Front-panel LEDs for Power, Active, and Fault diagnostics

• Operating Temperature: 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit)

• Net Weight: 0.23 kg (0.50 lbs)

Industrial Application Scenarios

The 1747-ASB is primarily deployed in large-scale manufacturing plants where I/O points are distributed across multiple machine cells or floors. It eliminates the need for expensive, long-distance home-run wiring by allowing local control signals to be multiplexed over a single shielded twisted-pair cable back to the central processor.

Professional FAQ

• Can the 1747-ASB support Analog I/O modules?

  Yes, it supports Analog I/O and other complex modules through the use of Block Transfer (BTR/BTW) programming in the host controller.

• Is a processor required in the remote rack with the 1747-ASB?

  No, the 1747-ASB replaces the SLC processor in the remote chassis, converting that rack into a "slave" I/O station controlled by a remote master scanner.