Siemens sitop uninterruptible power supplies ups ups500s ups500p siemens 6ep1933 2nc11 the siemens 6ep1933 2nc11 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 10kw 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 2nc11 sitop ups500p 10 kw ip65 647sec 24 vdc 7 a 7 a