Siemens 6EP4137-3AB00-0AY0 SITOP UPS1600 40A Uninterruptible Power Supply 24 V DC. SITOP UPS1600 40 A uninterruptible power supply input: 24 V DC output: 24 V DC/40 A. It belongs to SITOP UPS1600 DC UPS modules. Recorded manufacturer technical characteristics include Efficiency: 98.8 %; Active power: 960 W; Input voltage: 24 V DC; Output current: 40 A; Output voltage: 24 V DC; Protection class: IP20; Input voltage range: 22 - 29 V DC.