Safety Voltages
Connect only voltages that are within the following limits:
...........................................................V
SUP
to COM 30 VDC max, Measurement
Category I
...........................................................Chassis ground to COM 30 VDC max, Measurement
Category I
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.
Caution Do not connect the system to signals or use
for measurements within Measurement Categories II,
III, or IV.
14 | ni.com | NI 9860 Getting Started Guide
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