10-07-2010 05:28 PM
I am trying to connect an Omron Photosensor to NI9401 DAQ card. The Photosensor outputs a low voltage NPN signal. I believe there is a way to build a circuit that can convert the NPN signal to the TTL 0/5V signal needed. However, I'm not an electrical engineer and have exhausted my limited knowledge. The model number of the sensor is the EE-SX672A and the datasheet can be found at http://www.fa.omron.co.jp/data_pdf/cat/436_en.pdf
If anyone has any ideas, it would be greatly appreciated.
Solved! Go to Solution.
10-08-2010 02:29 AM - edited 10-08-2010 02:30 AM
Hi,
If the you power the Photosensor with 5Vdc you only need to add a (1k) resistor to get a 0-5V output signal for your digital input.
Kees
10-08-2010 07:23 AM - edited 10-08-2010 07:23 AM
To add to what Kees said, tie the 1K resistor from the sensor output pin to the 5VDC supply. Connect the digital input pin if your DAQ card to the sensor output pin.
10-08-2010 11:03 AM
Thanks to you both. That did the trick.
I knew it had to be something simple.
Thanks again!