Realy module Control relays in industrial systems At the interface between the controller and various I/O devices in the system, designed for limited space with a thickness of only 6.2 mm. for the 1 contact model and a thickness of 14 mm. for the 2 contact model with DIN EN 50178 safety standards. Comes with a System cabling V8 adapter. Helps reduce work time and wiring work, making connecting to the I/O System easy. With a variety of Accessories Cable entry is available in both spring and screw types.