NI 9215 Operating Instructions and Specifications
26
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Caution
Do
not
connect the NI 9215 with screw terminal
to signals or
u
se for meas
u
rements within Meas
u
rement
Categories III or IV.
NI 9215 with BNC Safety Voltages
Connect only voltages that are within the following limits.
AI+-to-AI–........................................ ±30 V max
Isolation
Channel-to-channel .................... No isolation between
channels
Channel-to-earth gro
u
nd
Contin
u
o
u
s ........................... 60 VDC,
Meas
u
rement Category I
Withstand ............................. 1,500 V
rms
, verified by a
5 s dielectric withstand test
Meas
u
rement Category I is for meas
u
rements performed on
circ
u
its not directly connected to the electrical distrib
u
tion system
referred to as
MAINS
voltage. MAINS is a hazardo
u
s live electrical
s
u
pply system that powers eq
u
ipment. This category is for
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