NI 9201/9221 20 ni.com
NI 9201/9221 with Screw Terminal Isolation VoltagesChannel-to-channel...........................No isol ation between
channels
Channel-to-earth ground
Continuous................... .............. 250 Vrms,
MeasurementCategory II
Withstand....................................2,300 Vrms, verified by a 5 s
dielectric withstand test
Measurement Category II is for measurements performed on
circuits directly connected to the electrical distribution system.
This category refers to local-level electrical distribution, such as
that provided by a standard wall outlet, for example, 115 V for U.S.
or 230 V for Europe.
Caution Do not connect the NI 9201/9221 with screw
terminal to signals or use for measurements within
Measurement CategoriesIII or IV.