Safety Voltages - National Instruments NI-9403 Getting Started Manual

Safety Voltages

Connect only voltages that are within the following limits:
Channel-to-COM
Isolation
Channel-to-channel
Channel-to-earth ground
Continuous
Withstand
up to 3,000 m altitude 1,000 Vrms, verified by a 5 s
up to 5,000 m altitude 860 Vrms, verified by a 5 s
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
NI 9403 Getting Started Guide | © National Instruments | 3
±30 V maximum on up to
8 channels at a time,
Measurement Category I
None
60 VDC, Measurement
Category I
dielectric withstand test
dielectric withstand test