What type of device is the relay's solenoid coil in the control logic?

The solenoid coil of a relay functions as an output device in control logic systems. Its primary role is to act on commands received from control logic by converting electrical energy into mechanical movement. When a control signal energizes the solenoid coil, it creates a magnetic field that pulls in a movable armature, which can either open or close a circuit. This action effectively controls power to other devices or components within the system.

The classification of the solenoid coil as an output device is based on its function in the control process. Unlike input devices that receive information (such as sensors or switches), the solenoid coil does not collect data but rather executes actions based on the commands it receives. Hence, it directly influences the operational state of other connected components, making it a pivotal element in control logic systems.