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 9220 with spring
terminal to signals or use for measurements within
Measurement Categories III or IV.
NI 9220 with DSUB Safety Voltages
Channel-to-COM ±30 V maximum
Isolation
Channel-to-COM None
Channel-to-earth ground
Continuous 60 VDC, Measurement
Category I
Withstand up to
2,000 m
1,000 Vrms, verified by a 5 s
dielectric withstand test
Measurement Category I is for measurements performed on
circuits not directly connected to the electrical distribution system
4 | ni.com | NI 9220 Getting Started Guide
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