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Meaning of tri-color LED states on USB-232 device

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This question is more out of curiousity, rather than a problem.  I've noticed that the more recently-purchased USB-232/4 devices we've received now seem to have front panel status LEDs that show *3* states (4 if you count "LED off"!) - yellow, green, and now red.

I haven't found anything in the online docs to describe something as mundane as what the LEDs mean.  I always assumed that yellow and green were the mark/space indicators.  Sometimes now they light up red briefly, but I haven't found it to correlate to any fault conditions.

 

What's up with that?

 

Dave

David Boyd
Sr. Test Engineer
Abbott Labs
(lapsed) Certified LabVIEW Developer
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Accepted by topic author DavidBoyd

Hi David,

 

I found the following screen shot in the NI-Serial help.

USB-232-LED.JPG

 

I hope that answers your question!

 

Thanks

Scott M.

Applications Engineer
National Instruments
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Scott,

Thanks so much!  In truth, I'd keyword-searched the online support resources and come up empty, but never looked through all the help files on my own hard drive.

 

Dave

David Boyd
Sr. Test Engineer
Abbott Labs
(lapsed) Certified LabVIEW Developer
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