RMX Programmable Power Supplies Safety Information & Installation Guide | © National Instruments | 11SpecificationsRMX-4120/4121/4122/4123AC InputNominal input rating......................................... 100 to 240 VAC, 50 to 60 Hz, single phaseInput voltage range ........................................... 85 to 265 VACInput frequency................................................. 47 to 63 HzCurrent (MAX) 1100 VAC................................................... 10.5 A200 VAC................................................... 5.25 AEnvironmental conditionsOperating environment ............................. Indoor use, overvoltage category IIOperating temperature .............................. 0 to 50 °C (32 to 122 °F)Operating humidity................................... 20 to 85% rh (no condensation)Altitude ..................................................... Up to 2,000 mPollution degree ........................................ 2RMX-4124/4125/4126/4127AC InputNominal input rating......................................... 100 to 240 VAC, 50 to 60 Hz, single phaseInput voltage range ........................................... 85 to 265 VACInput frequency................................................. 47 to 63 HzCurrent (MAX) 1100 VAC................................................... 21 A200 VAC................................................... 10.5 AEnvironmental conditionsOperating environment ............................. Indoor use, overvoltage category IIOperating temperature .............................. 0 to 50 °C (32 to 122 °F)Operating humidity................................... 20 to 85% rh (no condensation)Altitude ..................................................... Up to 2,000 mPollution degree ........................................ 21 With the rated load.