Siemens sitop smart din rail power supply 12v and 24v psu300s psu100s siemens 6ep1333 2ba20 the siemens 6ep1333 2ba20 is a sitop smart din rail power supply that meets the highest requirements for functionality e g for use in complex plants and machines the wide range input of 120 to 230v enables connection to any system in the world and reliably guarantees a high level of safety even in the event of large voltage fluctuations the power boost function briefly supplies up to three time