The principle of the relay for neon advertising screen device

The principle of the neon advertising screen device relay is to use the attraction and disengagement of the electromagnet to control the on and off of the switch, thereby realizing the control of the circuit. When the current passes through the coil of the relay, a magnetic field is generated, causing the iron core to be attracted, so that the contacts are closed and the circuit is energized; when the current stops, the iron core loses its magnetism, the contacts are disengaged, and the circuit is de-energized.