A-B 1783-SFP1GLX 1000BASE-LX/LH singlemode fiber

Direct Communication Module

The 1747-DCM module links the SLC 500 controller to the Allen-Bradley PLC for

distributed processing. The DCM acts as a remote I/O adapter on a remote I/O link.

Information is transferred between a local PLC or SLC scanner and a remote

1747-DCM module during each remote I/O scan. The number of DCMs that a scanner

can supervise depends on the number of chassis the scanner supports and the chassis size

of the DCM. The SLC 500 module controllers support multiple DCMs.

Note: An important distinction between a DCM module and the 1747-ASB module is

that a DCM is placed in the chassis with the processor and it does not scan any I/O in the

chassis as an ASB module does.

Selecting a ControlLogix System

The ControlLogix system architecture provides sequential, process, and

motion control together with communications and state-of-the-art I/O in a

small, cost-competitive package. The system is modular, so you can design,

build, and modify it efficiently - with significant savings in training and engineering.

A ControlLogix system can be anything from a simple chassis to a highly-distributed

system consisting of multiple chassis and networks working together.

A simple ControlLogix system consists of a stand-alone controller and I/O modules in a single chassis.

Or you can use the ControlLogix system as a gateway. Include the

communication modules you need for connectivity to other networks. For

this use, a controller is not required. The ControlLogix Gateway integrates

into existing PLC-based systems so that users with existing networks can

send or receive messages to or from other networks.