Basically, this is the question: Can a PCM be used without a pneumatic system to control a solenoid?
Basically, yes. There’s no rule saying you can only have a PCM on the robot if you have a pneumatics system.
That being said, what kind of solenoid are you trying to control without a pneumatic system? What are you using it for?
We are using it to release the pressure of a vacuum system. By opening the solenoid, the system will quickly return to atmospheric pressure. It is a regular 12V spring return solenoid that just opens when it’s powered and closes when it’s not. Would you recommend something else?
No, that seems like a good use for a solenoid
Just a warning-standard solenoid valves operate, actually switch, using pilot pressure. Generally, 25-30psi is required on the input line.
So, you’ll need one that isn’t piloted.
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How do you know if it is piloted?
Check the documentation for the valve. It will list a range of operating pressures. If you’re within that range you’re good to go.
A vacuum-rated valve callout:
This valve needs a minimum input pressure of 21psi to pilot:
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