PSSu E F DI OZ 2-R 315220 PSSu, electronic module, failsafe, digital inputs and outputs, 1 input, 1 test pulse output 0.25 A, 1 output, 2 A, dual-pole, shortcircuit-proof, overload-proof, free from feedback, for railway applications. The PSSuniversal Assistant is used for selection of the modules and for configuration of the decentralised I/O system PSSuniversal.