Siemens 6AG1931-2EC21-2AA0 SIPLUS PS DC-UPS 24V/15A with Conformal Coating. SIPLUS PS DC-UPS 24 V/15 A based on 6EP1931-2EC21 with conformal coating, -25…+60 °C, It belongs to SIPLUS PS DC UPS module 15 A. Recorded manufacturer technical characteristics include Peak current: 15.7 A; MTBF at 40 °C: 791 139 h; Charging current: 0.35 A, 0.7 A; Protection class: Class III; IP protection class: IP20; Short-circuit proof: Yes; Operating temperature: -25 ... +60 °C; Input voltage DC range: 22 ... 29 V.