[Al Skierkiewicz]

To add to Nate's post...
<R97> The Nason pressure switch must be connected to the output end of one of the Clippard tanks to sense the tank’s pressure. The two wires from the pressure switch must be connected directly to a digital input and ground terminal on the Robot Controller, and the controller must be programmed to sense the state of the switch and operate the spike relay that powers the compressor. The Parker Pressure Vent valve must be connected to a Clippard tank such that, when manually operated, it will vent to the atmosphere to relieve any stored pressure. The valve must be placed on the robot so that it is visible and accessible.

Although First is trying to decide what to do in this case, thus far (as in the past) it will be necessary to connect the pump through a Spike relay as specified above. Most teams to use this method, connected the pump output to the Parker Valve, then close it when up to pressure. In the past, it was then possible to demonstrate that the pnuematic system was able to achieve no greater than 120 PSI at the high side (Clippard Tanks) and that there was some kind of automatic shutoff that could be demonstrated for the inspector or field personnel. At a minimum expect that field judges will check your pressure to be sure it is not higher than 120 PSI, the consequence could be to drain your pnuematics before competing or possible DQ.
As always, anything that looks unsafe in any way, will not be allowed.