The limit magnet for the opening of the electric trackless telescopic gate is not directional. During the closing process of the electric telescopic gate, if the magnet is sensed below the closing limit rod, the door stops. To stop the door at a specific location, simply pre-bury a magnet directly below the corresponding limit rod. Confirm the polarity and secure the magnet with cement. Move the door body of the electric door to the fully open position, align the square magnet with the opening limit reed switch, bury it underground, level the ground with cement, and the opening limit magnet is installed.