Siemens sitop uninterruptible power supplies ups ups500s ups500p siemens 6ep1933 2nc01 the siemens 6ep1933 2nc01 is a member of the sitop family and is intended for the short time buffering of 24v dc operated simatic panel pcs the ups500p is rated at 5kw and provides up to 7a of output current the oblong metal enclosure of the ups module is also suitable for installing on hmi support arms siemens 6ep1933 2nc01 sitop ups500p 5 kw ip65 236 sec 24 vdc 7 a 7 a