Final answer:
A push button linked to an electrical control circuit and a solenoid valve can be designed to shut off the air supply to a valve when 0 volts are present post-release of the button. The control scheme involves a push button to initialize voltage delivery and the cessation of voltage to cut off the air supply. Additional components like a latch relay may be added for sustained control.
Step-by-step explanation:
To design a function diagram for a control scheme that enables a push button to shut off the air supply to a valve when 0 volts is delivered to the valve after the button has been released, you need to consider the following components:
A push button
An electrical control circuit
A solenoid valve or a similar device that can control the air supply
The control scheme would work as follows:
When the push button is pressed, the circuit is completed, delivering voltage to the solenoid valve.
The solenoid valve responds by allowing air to flow to the valve.
Once the button is released, the circuit is broken, causing the voltage delivered to the solenoid valve to drop to 0 volts.
With no voltage, the solenoid valve closes, cutting off the air supply to the valve.
A possible additional component is a latch relay or holding circuit that keeps the solenoid valve energized after the button is released until some event (such as pushing a separate stop button or reaching a predetermined condition) causes the power to be removed.