[Al Skierkiewicz]

Max,
R68 Compressed air on the ROBOT must be provided by one and only one compressor. Compressor specifications may not exceed nominal 12VDC, 1.05 cfm flow rate.
You may write code to use a Spike (and or a direct pressure switch input to the RoboRio under R77), to feed the compressor if you like. The above rule is very specific in the "one and only one". It is specific to the point that you may not use another compressor to charge your system if you already have one compressor on the robot. An off board compressor must be wired using the pressure switch input described above and must be controlled by the RoboRio and powered from the robot battery as in the past.