schakeloutput

A schakeloutput is a binary output channel used in control systems to switch devices on and off. The term is Dutch and is commonly encountered in PLC, automation, and process-control documentation. In English-language contexts it corresponds to a digital output or digital I/O, indicating that the channel conveys a two-state signal rather than an analog level.

Functionally, a schakeloutput receives a control signal from a processor or controller and drives a load accordingly. It is typically used to operate actuators such as relays, solenoids, indicator lamps, or other on/off devices. Depending on the design, the output may drive the load directly or via an intermediary element, and it may provide status feedback indicating whether the output is currently energized.

Schakeloutputs can be implemented in several forms. Relay outputs use mechanical contacts to make or break a circuit. Transistor outputs (NPN sinking or PNP sourcing) use semiconductor switches to drive low to moderate loads. Solid-state outputs employ devices like MOSFETs or thyristors for faster switching and longer life, especially at higher frequencies or when isolating control and load circuits. Protection and isolation features are common, including optical isolation between control and load sides, short-circuit and overcurrent protection, and accommodations for different load types (DC or AC).

Electrical characteristics vary with application. Control voltages commonly range from 5 to 24 V DC, while load voltages may span DC or AC levels (for example, 12–24 V DC or 120/230 V AC). Current ratings depend on the topology, with relay outputs handling higher inrush loads and transistor/solid-state outputs generally suited to lower-power loads.