How can I connect 1-wire sensor using DAQ?

Hi,
How can I connect 1-wire sensor using DIO in DAQ? I didn't find anything about it on this site.
Thanks.

Hello Depablo,
When making any voltage measurement you need to provide two wires and signal and a reference voltage.  If you have a digital sensor or device with a number of outputs there should also be a reference or ground voltage output so that you're measurement device can read the correct value.  If you don't connect the ground/reference voltage to the DAQ device then you'll be measuring a floating voltage and it won't be accurate.  Voltage is a relative measurement--your sensor may be outputting 5 volts relative to its internal ground, but that ground may be 10 volts above your DAQ cards ground.  If you measure the 5 volt line with your DAQ card you'll read 15 volts and not 5 volts unless you also connect the sensors ground to the DAQ card.  If you're unsure which wire to use as a reference you can either contact your sensor manufacturer, or if you like you can post back with a link to your sensor's data sheet and I can see if I can identify the correct wire.
I hope this helps, and have a great day!
Brooks

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