Pr1 rsc3au accepts relays for switching small loads and low level signals the module features the clever 13 unit relay socket with screw terminals relay socket connector for inputinterference suppression module and relay fixingremoval bracketthe advantages of this module include its width of only 16 mm and its wide range of applications depending on the model the back emf from the relay is attenuated by a snubber diode or varistor integrated in the module the status led is also in