NI 9235/9236 30 ni.com
Isolation
Channel-to-channel.................... None
Channel-to-earth ground
Continuous........................... 60 VDC,
Measurement Category I
Withstand............................. 1,000 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.
Caution Do not connect the NI 9235/9236 to signals or
use for measurements within Measurement CategoriesII,
III, or IV.