PSSu E S ABS SSI-T 314480 For digital or analogue signal processing. Up to 64 I/O modules can be installed in any order. PSSu, electronic module, failsafe, counter, 1 input, absolute encoder SSI encoder, differential signal RS422, resolution 32 Bit, 7 transmission rates, 62.6 – 1500 kHz, for increased environmentalrequirements.