Hello,
i have a question about DAQ grounding.
I use NI 9215 BNC + NI 9181.
Using the ground screw on the side ---> NI 9181 is grounded.
Because NI 9215 is connected to NI 9181 with the 15-pin D-SUB connector ---> NI 9215 is grounded.
My question is:
actually just the chassis of NI 9181 and NI 9215 are grounded.
But the channel and instrumentation implifier in NI 9215 are NOT grounded because of the channel-to-earth isolation.
In other words AIGND is isolated from this chassis grounding.
Am i right?
with best regards
Lei
