Pneumatics with diode

[martin417]

Originally Posted by Kevin Selavko

Is there any legal way to control more than 4 24 volt solenoids? Our solenoids only need power to switch, so we do not need to have them always on, only when we switch.

R42 says that we may only have 1 solenoid breakout in the 24 volt PDB port, and Q237 says that you may not have a 12 to 24 volt converter power the breakout, so there is no way to power a second breakout.

Is there a reason you are using dual solenoid valves? The only reason I can see to use a dual solenoid valve is if you want to set a condition and have it remain after the end of a period (autonomous or teleop). Otherwise, use single solenoid valves. For instance, for a shooter, use a two position two work port valve, so that it defaults to retract (normal or un-powered state). When voltage is applied, the valve shifts and the cylinder extends, and stays that way until power is removed. I would also recommend 12V valves. This way, you can control eight valves instead of just four.