Control of a vacuum pump

If I connect the BOB to P1 of the Mesa 7i76e do I also need to connect the USB ?

I also need the 12-24V or?

I am not so sure!

 

The 5ABOB requires 12-24V for the inputs and analog out
and 5V for everything else, not sure about your input
modifications...

You don't need to use the USB connector that's just for 5V
I would use a 5V terminal instead

So vacuum pump is connected and running!

Since I had changed the bit file of the 7i76e yes already for additional PWM's and had so far only one in use, was yes still one left!
Bit-File

I have me short hand this Converter for PWM to 0-10V analog procured.