How to correctly switch off USB 6008 DAQ ?

[veceeeee]

Even i closed all labview programs, the USB 6008 still maintain producing voltage at its analog output pins.  How?

Or i should close NI device monitor ?

[Dennis_Knutson]

If you want the output to be 0 volts, you just need to program it to be 0 volts. That's done with a DAQmx Write.

[veceeeee]

So that is a way. I think i will close all labview applications and just plug out the USB from my laptop. 🙂