scxi 1520 dual power supply

[cb34]

Greetings!

I am using an SCXI 1520 right now. I wish to get a dual voltage power supply out of it (+/-) 5V. I know that what I get is just 0-10V. But is there a trick to do this. Thank you very much!

-Ham

[bushman]

The 1520 is for implmenting strain gauges.
+/- voltages are not needed.
If you are trying to hook up a strain gauge to this, you need to use a wheatstone bridge configuration.
You use three resistors ane your strain gauge to form a H bridge, sample the voltage off the opposing legs and you will get +/- readings.

Good Luck

[cb34]

Well, i plan to use the 1520 to get signals from a conventional sensor (not strain gauges) that needs a dual power supply rail. Thanks for the suggestion!

Ham

[Sean_C.]

Hello,

There is no way to get +/- 10 V from the SCXI-1520. I recommend either using an external power supply, or the unused AO channels on your DAQ device to provide these voltages. To make use of the unused AO channels, you can either use a SCXI-1180 Feedthrough panel with a SCXI-1302 terminal block, or a 50-pin ribbon cable connected to a CB-50. Both of these simply give you access to the unused pins on the DAQ device (AI 1..N, AO 0..N, CTR, etc...).

For more information on the SCXI-1180, see:
http://sine.ni.com/apps/we/nioc.vp?cid=1645〈=US

For the CB-50, see:
http://sine.ni.com/apps/we/nioc.vp?cid=4842〈=US

Let me know if you have further questions.

Sincerely,

Sean C.
Applications Engineer
National Instruments