PSSu BS 1/8 C-T 314651 Carrier units for the I/O modules and supply voltage modules. These modules are simply inserted on to the base modules and are easy to change when making system adjustments. PSSu, base module for supply voltage modules, infeed module supply, infeed periphery supply, infeed C-rail, 1-row, 4 connection levels, 8 terminals, spring-loaded connection, forincreased environmental requirements. Only for use as first module after the head module in system environment A and after the remote station PSSu XRF-T.