The CRM relay module was designed as an interposing relay for use betweenPLC / DCS digital outputs and field devices. It is a general purpose relay with cULus approval.

The relay is socket mounted. The terminations used are of the “push-in”type which allows solid wires or wires with ferrules to be inserted directly without the need to open a clamp or torque a screw. Removing the wire is as simple as pressing a button and pulling the wire out. The style of termination is very compact and reduces installation time. When used with stranded wires the clamp is first opened by pressing the button and then the wire is inserted and the button released. These are not insulation displacement terminations – the wire still have to be stripped.

There are two input (coil) terminals for the 24Vdc connection and for the 0Vconnection. This makes it easy to “daisy chain” either connection without having to put 2 wires in one terminal.

The CRM relay is only 7mm wide on the DIN rail. Unlike 6mm wide relaymodules the terminations on the CRM are side-by-side instead of one over top of the other so wiring is neater and troubleshooting is easier. Mounting is on 32mm or 35mm DIN rails.