NI 9421/9423 18 ni.com
Weight
NI 9421/9423 with
screw-terminal ............................ 150 g (5.3 oz)
NI 9421 with DSUB................... 145 g (5.1 oz)
Safety
NI 9421/9423 with Screw-Terminal Safety Voltages
Connect only voltages that are within the following limits.
Channel-to-COM .............................. 30 V max
Isolation
Channel-to-channel .................... None
Channel-to-earth ground
Continuous ........................... 250 V
rms
,
Measurement Category II
Withstand ............................. 2,300V
rms
, verified by a 5 s
dielectric withstand test
Measurement Category II is for measurements performed on
circuits directly connected to the electrical distribution system.
This category refers to local-level electrical distribution, such as
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