A photocoupler is an optical coupling element that assembles a light-emitting element and a photosensitive element together, and achieves coupling through light to form an electro-optical and optical-electrical coupling element.
A photocoupler primarily converts optical signals into electrical signals, used to detect the movement of components. Furthermore, it acts as an intermediary between analog and digital circuits, improving circuit safety. It is crucial in robotics applications, industrial control DLC applications, server equipment, and power supply systems.
