Siemens 6EP1933-2EC51-8AA0 SITOP UPS500S EX DC UPS Power Supply. SITOP UPS500S EX maintenance-free uninterruptible power supply with USB interface basic device 5 kWs input: 24 V DC output: 24 V DC/15 A degree of protection IP20. It belongs to DC UPS with capacitors. Recorded manufacturer technical characteristics include Summary: Input: 24 V DC, Output: 24 V DC/15 A degree of protection IP20; Siemens family path: SITOP power supplies > SITOP DC UPS uninterruptible power supplies > DC UPS with capacitors.