Siemens 6EP4137-3AB00-1AY0 SITOP UPS1600 DC 24V 40A USB Uninterruptible Power Supply. SITOP UPS1600 40 A USB uninterruptible power supply with USB interface input: 24 V DC output: 24 V DC/40 A. It belongs to SITOP UPS1600 DC UPS modules. Recorded manufacturer technical characteristics include Efficiency: 98.5 %; IP protection: IP20; Peak output current: 120 A; Rated input voltage: 24 V DC; Rated output current: 40 A; Rated output voltage: 24 V DC; Operating temperature: -25 ... +70 °C.