CRIO9215 for digital tachometer signal?

Hi, may i know if it is possible to for the cRIO9215, which an analog input module for compactrio to read in a digital signal from a tachometer?
Thanks Thanks!!

Hi,
You shouldn't have any problem reading a digital signal with the cRIO-9215. 
Just keep in mind that you are reading a digital signal with an analog
line, so you will need to do some sort of logic on the analog signal to
determine if it's a true or a false.  As long as you don't exceed
rates of about 10kS/s on your tach, then you shouldn't have a problem
reading the signal.
Another thing to keep in mind is that according the Operators Manual
the cRIO-9215 can only handle +/- 30V.  Since some tachs may
output signals greater than that, you  may want to optically
isolate the tach from the cRIO device.
As long as your signal is within a readable range (+/- 10V) there is no
real different between an analog signal and a digital signal as far as
the analog to digital converter is concerned.
Regards,
Otis
Training and Certification
Product Support Engineer
National Instruments

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