Thread: Analog inputs not "working" — I only detect "noise"
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Unread 31-12-2008, 09:53
dmcguire3006 dmcguire3006 is offline
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Re: Analog inputs not "working" — I only detect "noise"
Check that you have connected the common pin to ground (any black wire on the robot). The NI9201 analog inputs are single-ended, but you MUST connect at least one of the COM connections to chassis ground.

See pages 9-10 of the NI9201 manual:
http://www.ni.com/pdf/manuals/373783f.pdf