Logic and AND/OR Circuits Flashcards
(11 cards)
What is a shuttle valve used for in a pneumatic system?
It allows air from either of two sources to pass through to a single output — creating an OR logic function.
How do you identify a shuttle valve symbol?
A small circle with two inlets (left and right) and one outlet (top), with a ball inside that moves to block one side.
What is an OR logic circuit in pneumatics?
A circuit where either of two inputs can activate the output independently.
How do you connect two 3/2 valves to a single acting cylinder in an OR circuit?
Use a shuttle valve to connect the outputs of both 3/2 valves before sending the air to the cylinder.
What is an AND logic circuit in pneumatics?
A circuit where both inputs must be activated at the same time to operate the output.
How do you connect two 3/2 valves to a single acting cylinder in an AND circuit?
Connect the outputs of both 3/2 valves in series so both must be pressed to allow air to reach the cylinder.
What would a shuttle valve allow in an OR circuit?
The cylinder to operate when either of the two input buttons is pressed.
When using two 3/2 valves, what is required for an AND circuit to work?
Both push buttons must be pressed together to allow air to pass to the cylinder.
Sketch the symbol for a shuttle valve.
A circle with two inlets from the left and right, a movable ball inside, and one outlet at the top.
Give a practical example of an OR circuit using a shuttle valve.
A machine that can be started from two different control points.
Give a practical example of an AND circuit.
A machine that requires two-hand operation for safety before it activates.
