When the relay coil is connected to the DC power of the rated voltage, the coil generates a magnetic field, attracting the iron core to act, the normally open contact connected to the iron core is closed, and at the same time, the normally closed contact is disconnected.

The weak point control part of the 24V DC relay needs to ensure that the relay coil voltage is 24V, so that the relay can work stably. As for the high voltage part, it is the load you expect to control (the light bulb in the picture). There are many types of contact groups in the relay contact system. It shows the situation of a group of contacts. First of all, you need to distinguish the contact group of the relay in your hand, and which end is the normally open contact (when the coil is not energized). The contact is disconnected) and the normally closed contact (the coil is disconnected only when the working voltage is supplied, and Yuanze Electric), and then it is wired through a general simple circuit to achieve your purpose.
The 24-volt DC relay is to control the coil and cut off the power to realize the connection and disconnection of the contacts, so as to achieve the logical control of the equipment.