10-07-2010 10:43 AM
Using a USB 6221 (or any std DAQ w/ DIO's) and want to connect an NPN sensor to activate a vi. This will be to replace existing mechanical finger switches for ergonomic reasons. The new sensor is an optical, no-touch switch.
Only vaguely familiar with transistor technology and am not sure how to make the connections.
The device I am trying to use is detailed here: http://info.bannersalesforce.com/xpedio/groups/public/documents/literature/28436.pdf
It is the OTBVN6 model shown in the upper left of page 2 of this document.
The device requires a minimum of 10vdc so not sure what I need to do to connect it to a DIO.
Thanks for any input
Doug
Solved! Go to Solution.
10-08-2010 02:46 AM
Hi Doug,
You can use the attached schematic to connect your device to a digital input. You can use the n.c. or n.o. output.
The resistor will limit the maximum current to 10mA with a 10Vdc power connected to Vcc. If you connect the 5V from your DAQ device to the Vcc connection you can leave out the zenerdiode.
Kees
10-08-2010 06:45 AM
Thanks,
I will give that a try.
I actually did get it to function with a DIO by connecting the NO to 5vdc from the DAQ and the NC to the DIO. (This after I blew one of the DIO's, I can't help trying things....)
Not sure why this works bit will set up your option as it is probably a lot safer for the DAQ
Doug