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Knowledge Introduction of Switch Connection with Lamp Keyboard

Release time:2019-01-29    Clicks: Click

Knowledge Introduction of Switch Connection with Lamp Keyboard
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What knowledge do we need to know about the connection of our button switch with lights and what problems do we need to know? Let's give you a detailed introduction.
 
Simply, this switch should be connected by two terminals, and the other three terminals should be connected by switch. Find out the terminal of the light and the terminal of the switch, and then distinguish which two terminals you want to use to connect the switch. Connect the light directly with the switch terminal, so that when the switch is connected, the light will turn on.
 
The key switch is a kind of master electric appliance with simple structure and wide application. In the electric automatic control circuit, it is used to manually send out control signals to control contactors, relays, electromagnetic starters, etc.
 
The four pins of the key switch are normally open and normally closed. Which two pins to use depends on the requirements of the circuit. For example, a simple self-locking circuit is that a key is normally closed as a stop and a key is usually turned on as a start. In the absence of pressing the button, the on call is normally closed, and after pressing the button, it is disconnected. Without pressing the button, the disconnected call is always turned on, and after pressing the button, the connection is made, of course, measured by the ohmic gear (_) of the multimeter.
 
There are many kinds of key switch structure, which can be divided into ordinary button-pressing, mushroom head type, self-locking type, self-resetting type, rotary handle type, with indicator lamp type, with lamp symbol type and key type, etc. There are single button, double button, three buttons and different combination forms, generally using building block structure, consisting of key cap, reset spring, bridge contact and shell, etc. Usually made into a composite type, with a pair. Normally closed contacts and often open contacts, some products can increase the number of contacts through a series of components. There is also a self-supporting button, which can automatically keep the closed position after pressing, and can only be opened after power failure.
 
The key switch can complete the basic control of starting, stopping, reversing, changing speed and interlocking. Usually each key switch has two pairs of contacts. Each pair of contacts consists of a constant open contact and a constant closed contact. When the button is pressed, two pairs of contacts act at the same time, usually closed contacts are disconnected, often open contacts are closed.
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