On operator panels, which component is commonly used to select the operational mode?

On operator panels, which component is commonly used to select the operational mode?

• A. Pushbuttons
• B. Rotary switches
• C. Selector switches
• D. Keypad

Answer: (C)

Focusing on mode selection, a selector switch is the typical control used on operator panels. It provides several distinct, clearly labeled positions that stay in place until changed, so the current operating mode is always obvious to the operator. The physical detent and easy-to-read indication reduce the chance of accidental changes and support safe operation, sometimes even with optional interlock or lock features. While rotary switches can perform a similar function, selector switches are the standard choice specifically designed for selecting modes, offering quick, reliable mode changes at a glance. Pushbuttons are better for momentary actions like start/stop, and a keypad is for data entry, not straightforward mode selection.

Focusing on mode selection, a selector switch is the typical control used on operator panels. It provides several distinct, clearly labeled positions that stay in place until changed, so the current operating mode is always obvious to the operator. The physical detent and easy-to-read indication reduce the chance of accidental changes and support safe operation, sometimes even with optional interlock or lock features. While rotary switches can perform a similar function, selector switches are the standard choice specifically designed for selecting modes, offering quick, reliable mode changes at a glance. Pushbuttons are better for momentary actions like start/stop, and a keypad is for data entry, not straightforward mode selection.