What device is often used to allow an operator to switch a machine from automatic mode to manual mode?

A selector switch is specifically designed to enable operators to easily change between different modes of operation, such as switching from automatic to manual mode. This device typically features multiple positions, allowing for clear selection and indicating the current mode without confusion.

In contrast, a push button generally provides a temporary input signal, suitable for initiating short actions rather than mode changes. A relay switch serves as an electromechanical device that opens or closes contacts to control larger electrical currents and is not primarily focused on mode selection. A toggle switch, while capable of switching between positions, lacks the specific labeling and functionality that a selector switch offers for distinguishing operational modes.

Thus, the use of a selector switch in this context allows for a user-friendly and effective means of transitioning between operational modes for machines.