Final answer:
Cam-operated pneumatic 3/2 valves can be set up as either normally open (NO) or normally closed (NC), controlling airflow based on the cam's motion and position.
Step-by-step explanation:
Cam-operated pneumatic 3/2 valves can be connected to be either normally open (NO) or normally closed (NC). These types of valves are used in pneumatic systems to control the flow of air or gas. The '3/2' designation indicates that the valve has three ports and two positions. In the normally open configuration, air flows through the valve when it is in its default, unactuated position. Conversely, in the normally closed configuration, the valve blocks air flow until it is actuated.
The operation of the valve is determined by the cam mechanism where the cam's shape and position dictate whether the valve is in its open or closed state. Changing between NO and NC configurations can often be done by adjusting the mounting of the valve or modifying the actuator's position in relation to the cam.