Siemens 6EP1931-2DC21 SITOP DC UPS MODULE 24 V/6 A UNINTERRUPTIBLE POWER SUPPLY WITHOUT INTERFACE. SITOP DC UPS module 24 V/6 A uninterruptible power supply without interface input: 24 V DC/6.85 A output: 24 V DC/6 A. It belongs to SITOP DC UPS. Recorded manufacturer technical characteristics include Input current: 6.85 A; Charging current: 0.2 A / 0.4 A; Protection class: IP20; Input voltage range: 22 ... 29 V DC; Output current (rated): 6 A; Output voltage (rated): 24 V DC; Input supply voltage (rated): 24 V DC; Efficiency (normal operation): 95 %.