National Instruments RMX-4120 User Manual page 136

Appendix A Specifications
General
Weight
RMX-4124/4125.......................................Approximately 9.5 kg (20.94 lb)
RMX-4126/4127 .......................................Approximately 9.0 kg (19.84 lb)
Environmental conditions
Operating environment .............................Indoor use, overvoltage category II
Operating temperature ..............................0 to 50 °C (32 to 122 °F)
Operating humidity ...................................20 to 85% rh (no condensation)
Storage temperature ..................................-10 to 60 °C (14 to 140 °F)
Storage humidity.......................................90% rh or less (no condensation)
Altitude .....................................................Up to 2,000 m
Pollution degree ........................................2
Cooling method.................................................Forced air cooling using fan
Grounding polarity............................................Negative grounding or positive grounding
Isolation voltage
RMX-4124/4125.......................................±250 Vmax
RMX-4126 ................................................±500 Vmax
RMX-4127 ................................................±600 Vmax
Withstand voltage
Between input and FG ..............................No abnormalities at 1500 Vac for 1 minute
Between input and output
RMX-4124/4125/4126......................No abnormalities at 2000 Vac for 1 minute
RMX-4127 ........................................No abnormalities at 2250 Vac for 1 minute
Between output and FG
RMX-4124/4125...............................No abnormalities at 1500 Vdc for 1 minute
RMX-4126 ........................................No abnormalities at 1600 Vdc for 1 minute
RMX-4127 ........................................No abnormalities at 2000 Vdc for 1 minute
Insulation resistance
Between input and FG ..............................±500 Vdc, 100 MΩ or more (70% or less)
Between input and output
RMX-4124/4125/4126......................±500 Vdc, 100 MΩ or more (70% or less)
RMX-4127 ........................................±1000 Vdc, 100 MΩ or more (70% or less)
Between output and FG
RMX-4124/4125/4126......................±500 Vdc, 40 MΩ or more (70% or less)
RMX-4127 ........................................±1000 Vdc, 40 MΩ or more (70% or less)
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Confirm the RMX-4127 is not grounded when it generates greater than 600 V.
A-20 | ni.com
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possible