This Loopback device for XCSRC RFID Safety Switch daisy-chain model is compatible with XCSRC12M12 and XCSRC32M12. This M12 plug must be connected to the reader which starts the chain. This M12 plug must be connected to the reader which starts the chain. Its dimensions are 17.2mm (width) x 16mm (depth) x 25mm (height). It weighs 0.020kg Contactless safety switches are specifically designed for industrial machines fitted with doors, covers or guards with imprecise guiding. They are ideally suited for machines subjected to frequent washing or liquid spray. Safety switches for the protection of operators, by controlling the safe opening and interlocking of guards and covers in your installations