Where is the ground pin of the NI 9401?

[aeroAggie]

Guys and gals,

This is a really simple question, but where is the ground pin of an NI 9401? I see here (last page) the pin out of the module, but I don't see a GND port. Do I just connect a signal's ground to a NC port? Or a COM port? (does this stand for "common")?

Thanks!

[lcgse88 · Accepted solution]

Hi,

Yes COM stands for common and to ask your question the COM port would be ground. Please read the first paragraph in the next link Here. Hope this helps, have a nice day.

Luis G.

National Instruments

[aeroAggie]

Luis,

Thanks for the help. I noticed that paragraph as soon as I submitted this post...