Which system uses switches actuated by cam or vane for elevator operation?

The system that employs switches actuated by a cam or vane for elevator operation is selector circuits. In this context, selector circuits are designed to manage the sequence of operations of an elevator by determining the next stop based on the position of the cam or vane. The physical movement of the cam or vane triggers the switches to make or break connections, allowing the control system to know when to stop the elevator at a designated floor.

This method is particularly effective in managing the logic of multiple stops efficiently, as the cam or vane provides a mechanical means to relay information about the elevator's position at any given time. This facilitates smooth operation and reliable stopping, critical for safety and efficiency in elevator systems.

While control logic circuits and relay circuits are essential in various electrical systems, they do not specifically utilize cam or vane mechanisms for their operation. Feedback control systems also play a role in more complex systems where ongoing measurement and adjustment are necessary, but they focus primarily on adjusting outputs based on feedback rather than on the sequential control provided by a cam or vane in a selector circuit.