USB-8473, USB-9201, USB-GPIB constant hardware resource conflict

[DinoS]

I have the three NI devices mentiond above. They seem to have constant hardware conflicts. If I open MAX & run self tests of the devices, I usually find that 1/3 fails the self test. Unplugging that device, and plugging it back in will fix that device, but make one of the other three fail (like whack-a-mole). A system reboot usually fixes the problem, but not always. I have seen the issue on multiple computers.

How can I keep this from happening?

[Christopher_T.]

Hi DinoS,

How are these USB devices connected to your machine? Are they connected on the same USB Controller? Are there some cases on other machines where all 3 work fine?

Thank you!

Regards,

[DinoS]

Yes, they are on the same USB controller. I haven't seen a case where all three work fine. It seems like the conflict is really between the 8437 and 9201.

The order of events is usually something like this:

* Will be using the GUI, all three components working fine.

* Stop the GUI, come back to it at a later time

* Start the GUI, the 8473 will not be working.

* Open MAX, 8473 fails self test.

* Unplug 8473, plug back in. 8473 passes self test

* 9201 fails self test

* Restart computer, all devices work

Any ideas?

Thanks

Dino

[Dennis_Knutson]

I just went through the same issues. Get yourself a good externally powered USB controller that you know provides 500ma per port. As soon as I replaced the one from the dicount electronics store, my problems went away.