Allen-Bradley 1747-ASB I/O Adapter Module

Overview
The 1747-ASB is a remote I/O adapter module within the SLC 500 system, designed to facilitate communication between SLC or PLC scanners and various 1746 I/O modules via Remote I/O. This module features a Universal Remote I/O Adapter communication port and supports data transfer rates of 57.6, 115, or 230 kilobits per second.

Technical Specifications

• Manufacturer: Rockwell Automation

• Brand: Allen-Bradley

• Series: SLC 500

• Part Number/Catalog No.: 1747-ASB

• Module Type: I/O Adapter Module

• Communication Port: Universal Remote I/O Adapter

• Communication Rate: 57.6, 115, or 230 kbps

• Backplane Current (5 V DC): 375 mA

• Cable: Belden 9463 or equivalent

• Slot Width: 1-Slot

• Number of Slots Supported: 30

• Number of Nodes: 16 standard, 32 extended

• Connectors: 6-Pin Phoenix Connector

• Operating Temperature: 0–60°C

• Dimensions: 5.72 × 1.37 × 5.15 inches

• Weight: 0.37 lbs (168 g)

• UPC: 10662468028766

Description
The 1747-ASB serves as a bridge for Remote I/O, linking one master device (SLC or PLC scanner) with one or more slave adapter devices. It supports discrete and block transfer I/O mapping, including ½-slot, 1-slot, and 2-slot addressing for efficient image utilization.

Installed alongside an SLC 500 processor, the 1747-ASB scans I/O modules in the chassis and provides a backplane current of 375 mA at 5 V DC. It can communicate over distances up to 3040 meters and supports user-selected image sizes of up to 32 logical groups. The module also enables control of up to 30 chassis slots and provides non-volatile memory with extended node capability up to 32 adapters.

For connectivity, the 1747-ASB uses a 6-Pin Phoenix Connector and requires Belden 9463 or equivalent cabling. No user programming is necessary. The module supports all SLC 500 I/O modules, including basic, resistance, and high-speed counter modules. Operational status and error diagnostics are displayed on three 7-segment displays. Designed for industrial environments, the 1747-ASB meets NEMA standard noise immunity requirements.