Siemens sitop din rail power supply psu100c 12v and 24v siemens 6ep1331 5ba00 the siemens 6ep1331 5ba00 is a sitop psu100c smart din rail power supply it is used for primary clocked power supplies for connection to a 1 phase ac line supply or to dc power systems the led display indicates the operating status the output of the device is isolated no load proof and short circuit proofthe power supply is ideal for switch boxes and small switch cabinets siemens 6ep1331 5ba00 sitop psu100c