The S8M turns your machine directly into UL Class 2 compliant, maximum tripping current is 3,8A per channel (adjustable). This unit controls up to 4 circuits. On top of this you will get startup / shutdown –sequence control, display and alarm functions, like voltage, output current, runtime, and over temperature and external reset. These functions can be set by using the front buttons or with the free support tool software. These settings can be protected.