What are the contact forms of 5v relay

5v relay is a 5V electrical control device, which is an electrical appliance that causes the controlled quantity to undergo a predetermined step change in the electrical output circuit when the change of the input quantity meets the specified requirements. It has an interactive relationship between the control system and the controlled system. Usually used in automated control circuits, it is actually an "automatic switch" that uses a small current to control the operation of a large current. Therefore, it plays the role of automatic adjustment, safety protection, and conversion circuit in the circuit.

There are three basic forms of 5v relay contacts:

1. The two contacts of the moving-on (normally open) 5v relay coil are disconnected when the coil is not energized, and the two contacts are closed after the power is energized. It is represented by the pinyin prefix "H" of the ligature.

2. The two contacts of the movable-break (normally closed) 5v relay coil are closed when the coil is not energized, and the two contacts are disconnected after energization. It is indicated by the pinyin prefix "D" of hyphenation.

3. Conversion type 5v relay This is a contact group type. This kind of contact group has three contacts in total, that is, the middle is a moving contact, and the upper and the lower are a static contact. When the coil is not energized, the movable contact and one of the static contacts are disconnected and the other is closed. After the coil is energized, the movable contact moves to make the original open to be closed, and the original closed to the open state to reach the converted state. Purpose. Such a contact group is called a changeover contact.