Allen-Bradley 1747-DCM Direct Communication Module

The Allen-Bradley 1747-DCM Direct Communication Module is a SLC 500 interface that provides direct communication between a fixed or modular SLC 500 PLC and a supervisory controller over the RIO Link, enabling distributed processing within a Rockwell Automation SLC 500 system. It installs in an SLC 500 backplane slot to connect expansion chassis or modular controllers to a supervisory AB PLC for integrated data exchange across a distributed control network. Key specifications include a 5.72 in (145 mm) x 1.37 in (35 mm) x 5.15 in (131 mm) form factor, a backplane current draw of 360 mA at 5 V, and an operating temperature range of 0 to 60 C (32 to 140 F). The module uses a Belden 9463 cable and 6-pin Phoenix connectors for its data and control interfaces, and weighs about 0.37 lb (168 g). Typical applications involve linking SLC 500 expansion or modular I/O to a supervisory controller via the RIO Link to support distributed control and coordinated operation across the system.