Key Automation Training
400 West Peachtree Street NW
Suite #4 - 1429, Atlanta, GA 30308

DHRIO Module - do your systems need "blue hose" connections?

CLX DHRIO ModuleMany existing plants have an extremely large investment in older “1771” style I/O hardware – and in the solid old PLC-5 controllers. Upgrading to a newer ControlLogix system is often done in stages – so maintaining communication with the existing hardware is usually a necessity.

The 1756-DHRIO module provides a means of connecting the legacy cables (usually known as “blue hose”) to the ControlLogix system.

The “DH” in the module’s catalog number refers to Data Highway Plus – which is the native communication network for the PLC-5 processor family. The “RIO” indicates that the module can also handle Remote Input and Output connections.

Our Boot Camp classes can provide hands-on exercises in using the 1756-DHRIO module for communicating over a Data Highway Plus network – and in working with Remote I/O systems.

Reference material on Allen-Bradley’s website

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