input AC 380V, output 240V DC, connect directly to PC and Server, just like ups of computer, no need to ... with fanProtocalRS485, RS232Accoustic noise<60dBProtectionMulti-protectionMulti-protection including input over or under-voltage, output over or under- ... 90%Air pressure70 ~ 106kPaSafetyInsulation resistanceI/O to chassis and input to output >20MΩ (Test voltage: 500Vdc)Dielectric strengthImpose ...