©
National Instruments Corp.
15
NI 9477 Operating Instructions and Specifications
meas
u
rements of voltages from specially protected secondary
circ
u
its. S
u
ch voltage meas
u
rements incl
u
de signal levels, special
eq
u
ipment, limited-energy parts of eq
u
ipment, circ
u
its powered by
reg
u
lated low-voltage so
u
rces, and electronics.
Caution
Do
not
connect the NI 9477 to signals or
u
se
for meas
u
rements within Meas
u
rement Categories II,
III, or IV.
Isolation Voltages
Channel-to-channel........................... None
Channel-to-earth gro
u
nd
Contin
u
o
u
s ................................. 60 VDC, Meas
u
rement
Category I
Withstand.................................... 1,000 V
rms
, verified by a 5 s
dielectric withstand test
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