PSSu E F PS1 312191 PSSu, electronic module, failsafe, supply voltage, infeed module supply 24 V DC 10 A, infeed periphery supply 24 V DC 10 A, infeed C-rail 10 A. The product has been discontinued. The successor is 312192. The PSSuniversal Assistant is used for selection of the modules and for configuration of the decentralised I/O system PSSuniversal.