PSSu E F AI U-R 315265 PSSu, electronic module, failsafe, analogue inputs and outputs, 1 input,- – 10.24 – 10.23 V, dual-pole, differential input, resolution 13 Bit, for railway applications. PSSuniversal – PLC Controller … PSSu, head module with increased performance, control system PSSu PLC, failsafe and standard, PL e, SIL CL 3, 2 RJ45