NI 9485 Operating Instructions 16 ni.com
SafetySafety Voltages
Connect only voltages that are within these limits.
Channel a-to-Channel b.................... 60 VDC max, 30 Vrms max
Isolation
Channel-to-channel
Continuous........................... 60 VDC
Withstand............................. 1,390 Vrms, verified by a 5 s
dielectric withstand test
Channel-to-earth ground
Continuous...........................250 Vrms,
MeasurementCategory II
Withstand.............................2,300 Vrm s, verified by a 5s
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). Do not connect to signals or use for
measurements within Measurement Categories III or IV.