PSSu E F ABS SSI 312275 PSSu, electronic module, failsafe, counter, 1 input, absolute encoder SSI encoder, differential signal RS422, resolution 32 Bit, 7 transmission rates, 62.6 – 1500 kHz. The PSSuniversal Assistant is used for selection of the modules and for configuration of the decentralised I/O system PSSuniversal.