poe transformer 1.Approval:CE,FCC,ISO9001 2.Input:165VAC~280VAC,47Hz~ ... cool, clean, no conductive dust, no corrosive gases.Places without explosion hazard.Technical characteristics and parameters1.Input voltage: 165VAC~280VAC,47Hz ... at least 4 hours),Relative humidity:5% ~90%RH poe transformer 24 ports