NI 9477 - Want to turn off outputs in case of communication/USB Fault

[SamiMughalRadius]

I have set up a CDaq with some modules, one of which is a NI 9477. I am using it turn on and off various parts of the system. 

The system runs a HV PSU, and while it is not common, there is a chance that the system may arc. When this happens, it tends to act like an ESD bomb, and that has killed the NI communications on a couple of occasions for us. 

One of the items that is controlled by the NI 9477 is the PSU, and I want it to turn off the moment such a communication issue occurs.

Is this a possibility at all?

What I am hoping is that in case of any fault or communication, all outputs (or particular outputs) on the NI9477 drop to FALSE. 

[SamiMughalRadius]

I have attached my program as well.

I am hoping that there is some kind of a 'USB Communications' property that the moment we get a false it turns off the setup? Though I am not sure if it will work as the communications would have failed by then. 

[crossrulz · Accepted solution]

If this is something safety critical, 1) you should not be using USB and 2) you should be using a cRIO or an RT cDAQ chassis.  With these, you can have the controller figure out if something went wrong and shut down.  With the cDAQ, you are pretty much dead in the water.

[SamiMughalRadius]

Hi CrossRulz

Many thanks for your advice. I thought as much, but wanted to check with the community as well. 

This element is not safety critical, as it operates in an isolated rig with other interlock systems in the way. However, it would have been great if I could have been able to add this too. 

Sami