Safety Voltages - National Instruments NI 9375 Getting Started Manual

Safety Voltages

Connect only voltages that are within the following limits:
Channel-to-COM or
Vsup-to-COM
Isolation
DI bank-to-DO bank
Channel-to-Channel
Channel-to-earth ground
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
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Continuous
Withstand
NI 9375 Getting Started Guide | © National Instruments | 3
30 VDC maximum
60 VDC maximum
No isolation between channels
60 VDC,
Measurement Category I
1,000 Vrms, verified by a 5 s
dielectric withstand test