What type of output is a solenoid valve connected to in a control system?

In a control system, a solenoid valve is typically connected to a digital output. This is because solenoid valves operate as on/off devices, allowing or blocking the flow of fluid based on the electrical signal they receive. When the control system sends a signal to the solenoid, it either energizes or de-energizes the valve. This functionality aligns with the definition of digital output, which represents discrete states (i.e., on or off).

Analog output would indicate varying levels within a range, applicable to devices that require continuous control, such as variable speed drives or systems that modulate settings. Power output is more associated with supplying power to devices rather than controlling their state, and signal output could refer to broader categories, such as including analog or digital signals for data transmission rather than specifically indicating valve operation. The clear binary control nature of solenoid valves makes digital output the appropriate answer.