National Instruments RMX-4120 User Manual page 126

Appendix A Specifications
General
Weight
RMX-4120/4121.......................................Approximately 8 kg (17.64 lb)
RMX-4122/4123 .......................................Approximately 7.5 kg (16.53 lb)
Cooling method.................................................Forced air cooling using fan
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
Grounding polarity............................................Negative grounding or positive grounding
Isolation voltage
RMX-4120/4121.......................................±250 Vmax
RMX-4122 ................................................±500 Vmax
RMX-4123 ................................................±600 Vmax
Withstand voltage
Between input and FG ..............................No abnormalities at 1500 VAC for 1 minute
Between input and output
RMX-4120/4121/4122......................No abnormalities at 2000 VAC for 1 minute
RMX-4123 ........................................No abnormalities at 2250 VAC for 1 minute
Between output and FG
RMX-4120/4121...............................No abnormalities at 1500 VDC for 1 minute
RMX-4122 ........................................No abnormalities at 1600 VDC for 1 minute
RMX-4123 ........................................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-4120/4121/4122......................±500 VDC, 100 MΩ or more (70% or less)
RMX-4123 ........................................±1000 VDC, 100 MΩ or more (70% or less)
Between output and FG
RMX-4120/4121/4122......................±500 VDC, 40 MΩ or more (70% or less)
RMX-4123 ........................................±1000 VDC, 40 MΩ or more (70% or less)
1
Pollution is addition of foreign matter (solid, liquid or gaseous) that may produce a reduction of dielectric
strength or surface resistivity. Pollution Degree 2 assumes that only non-conductive pollution will occur
except for an occasional temporary conductivity caused by condensation.
2
Confirm the RMX-4123 is not grounded when it generates greater than 600 V.
A-10 | ni.com
1
possible 2