21CX4

21CX4 Application Field and Working Principle

21CX4 snap action, limit switch is a common electromecha- nical switching device found in various industrial applications. It is widely used in automation systems, control systems, and other environments. This device is a multi-purpose switching device used to provide position feedback in industrial and machinery applications.

Working Principle

A 21CX4 snap-action, limit switch is a type of switch that uses physical movement as a trigger in order to make an electrical contact. It is an electro-mechanical device that uses a movable arm to make and break electrical contact when it moves.

When the moving body moving to the action range of the switch, it will move the movable arm, and then the contact on the arm will be changed. In this way, the switch will send the control signal. When the moving body leaves the action range of the switch, the movable arm will return to its original position by the action of the spring inside the switch.

The working principle of the limit switch is not very complicated; it consists of an actuator and a set of contacts. The actuator is the part that moves, and the contacts are either normally open or normally closed. The switch will actuate when the arm is pushed or moved, and it will reset when the actuator returns to its initial position.

Application Field

21CX4 snap action, limit switch is a kind of general switch, which is widely used. It can be used in many application fields, such as automobiles, automatic doors, power systems, machine tool automation, and other places.

In automobile industry, limit switch is usually used to control the opening and closing of the door, and the acceleration of the engine. In power systems, limit switches can be used to control the movement of high-voltage equipment and instruments, so as to ensure that the personnel and equipment are not impacted by electric shocks.

In addition, limit switch can also be used in machine tool automation. With this type of switch, the machine can be programmed to run without human intervention, and any potential hazards can be detected early and minimized.