01-21-2010 04:52 PM
01-22-2010 12:22 PM - last edited on 02-21-2024 09:12 AM by migration-bot
Hell bklynch,
Stacking PXI 4110 Channels for Higher Voltage Range DeveloperZone article has the an example code and front panel terminal connections to assist in your application. You can probably streamline the code by removing the aux channel.
01-22-2010 01:58 PM
01-22-2010 02:18 PM
Thanks for the replies Glenn! I've been looking into the option of cascading the two outputs but unfortunately that still does not provide the necessary range. Cascading the outputs only allows you to increase the overall potential difference (ie. +20 to -20 = +40), however the polarity remains positive at all times. If I could place a constant -10 V voltage source in series with the 0 to +20 V channel then I believe it would work, but this just results in interference between the two channels when using the programmable power supply.
It looks like the only solution will be a custom circuit using transistors to switch the polarity or flip between the two power supply channels -- although I have not given up on some kind of solution similar to cascading! Thanks again, your feedback is most welcome!
Brian
01-25-2010 05:55 PM - last edited on 02-21-2024 09:17 AM by migration-bot
Hello Brian,
I've reread the first and most recent post and I think I've come to an understanding to what you have suggested and need to do in your application. Please correct me if I have misunderstood.
You mentioned that you were thinking of supplying a -10V in series of one of the channels to achieve the desired range. This is definitely feasible with the isolated outputs that the PXI-4110. You can bias the floating ground by providing -10V from an external power supply, per below image.
If I understand correctly, this is may not be what you want to do. It sounds like you want to maintain a two lead connection to your DUT in which case the 4130 and 4132 which are the four-quadrant bipolar power source measure units would be better suited.
Can you provide more information about the application in which I case I can provide further suggestions.