way. If the product is damaged, return it to NI for
repair.
Hazardous Voltage
This icon denotes a warning
advising you to take precautions to avoid electrical
shock.
NI 9221 with Screw Terminal and NI 9221 with
Spring Terminal Safety Voltages
Connect only voltages that are within the following limits.
Channel-to-COM
±60 VDC maximum
Channel-to-channel
None
Channel-to-earth ground
Continuous
250 Vrms, Measurement
Category 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
NI 9221 Getting Started Guide
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© National Instruments
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