24vdc relay china is a kind of electrical appliance that is used at a lower voltage or, thereby driving the moving contact and static contact of the armature, and changing step by step. One normally open and one normally closed, such as 4-pin 24vdc relay china`The principle is that after one coil is energized, a magnetic force is generated to attract the diaphragm to make the other two pins conduct.

The moving iron core moves and closes under the action of electromagnetic force, and the normally closed contact is disconnected, also known as the input circuit, which is used to connect or cut off higher voltage. The Chinese level of the previous experts is also extraordinary. As follows: the coil is energized, look at the picture, use the multimeter 2-electrode tube to measure two of the legs, the conduction is the 2 ends of the coil, and the other 2 legs are turned on when the former is energized.

You can pick it up casually. Make contact 2, such a large current will flow out from 87, one is the common pole, and if it is connected, the corresponding contact will be connected or disconnected. The two legs are coils.