Allen-Bradley 1747-DCM Direct Communication Module

System Overview

The 1747-DCM Direct Communication Module connects any SLC 500 programmable controller with an expansion chassis or SLC 500 Modular Programmable Controller to a supervisory Allen-Bradley programmable controller via the RIO Link, enabling a distributed processing system.

The 1747-DCM allows supervisory processors to transfer data between one another and appears as an RIO adapter to:

• A PLC processor with integral RIO scanner on the RIO Communication Link

• An RIO scanner, catalog number 1771-SN or 1747-SN, on the RIO Communication Link

The 1747-DCM can physically reside on the RIO Link with any other adapter and is compatible with all RIO scanners.

1747-DCM modules are connected in a daisy-chain configuration using Belden™ 9463 cable.

Extended Node Capability

The 1747-DCM supports extended node capability, allowing up to 32 adapters on the RIO link when using an 82Ω termination resistor at both ends of the RIO link for all baud rates.