Safety Voltages
Connect only voltages that are within the following limits.
Channel-to-COM
or Vsup-to-COM
30 V maximum,
Measurement Category I
Isolation
Channel-to-channel None
Channel-to-earth ground
Continuous 30 Vrms, 42.4 Vpk, 60 VDC
Withstand 400 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
referred to as MAINS voltage. MAINS is a hazardous live
electrical supply system that powers equipment. This category is
for measurements of voltages from specially protected secondary
circuits. Such voltage measurements include signal levels, special
equipment, limited-energy parts of equipment, circuits powered
by regulated low-voltage sources, and electronics.
NI 9411 Getting Started Guide | © National Instruments | 3
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