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The relay is composed of iron core, coil, armature, contact reed, etc. When a certain voltage is applied at both ends of the coil, a certain current will flow through the coil, resulting in electromagnetic effect. Under the action of electromagnetic force, the armature will overcome the tension of the return spring and attract to the iron core, so as to drive the dynamic contact and static contact (normally open contact) of the armature to pull in. When the coil is powered off, the electromagnetic suction also disappears, and the armature will return to the original position under the reaction force of the spring to release the moving contact and the original static contact (normally closed contact). In this way, it is pulled in and released, so as to achieve the purpose of on and off in the circuit. The "normally open and normally closed" contacts of the relay can be distinguished in this way: the static contact in the disconnected state when the relay coil is not energized is called "normally open contact"; The static contact in the on state is called "normally closed contact". Relays generally have two circuits, low-voltage control circuit and high-voltage working circuit.
| Parameter type | Characteristics |
|---|---|
| Specification | 22×49mm |
| Positioning aperture | 3mm |
| Control signal | Digital signal |
| Working voltage | 5V |
| Interface | 3P |
| Line sequence | G V D NO COM NC |
| Product features | （1）When there is a low-level signal at the signal input end, the common end and the normal beginning will be connected |
| （2）It can directly control various equipment and loads | |
| （3）It has power supply and relay action indication, which is on when in and off | |
| （4）There is a normally open and a normally closed contact | |
| （5）Control DC or AC signal to control 220V AC load |
The relay is composed of iron core, coil, armature, contact reed, etc. When a certain voltage is applied at both ends of the coil, a certain current will flow through the coil, resulting in electromagnetic effect. Under the action of electromagnetic force, the armature will overcome the tension of the return spring and attract to the iron core, so as to drive the dynamic contact and static contact (normally open contact) of the armature to pull in. When the coil is powered off, the electromagnetic suction also disappears, and the armature will return to the original position under the reaction force of the spring to release the moving contact and the original static contact (normally closed contact). In this way, it is pulled in and released, so as to achieve the purpose of on and off in the circuit. The "normally open and normally closed" contacts of the relay can be distinguished in this way: the static contact in the disconnected state when the relay coil is not energized is called "normally open contact"; The static contact in the on state is called "normally closed contact". Relays generally have two circuits, low-voltage control circuit and high-voltage working circuit.
| Parameter type | Characteristics |
|---|---|
| Specification | 22×49mm |
| Positioning aperture | 3mm |
| Control signal | Digital signal |
| Working voltage | 5V |
| Interface | 3P |
| Line sequence | G V D NO COM NC |
| Product features | （1）When there is a low-level signal at the signal input end, the common end and the normal beginning will be connected |
| （2）It can directly control various equipment and loads | |
| （3）It has power supply and relay action indication, which is on when in and off | |
| （4）There is a normally open and a normally closed contact | |
| （5）Control DC or AC signal to control 220V AC load |
