limit switch purchase XZ-9102
The limit switch is a commonly used small current master electrical appliance. Using the collision of the production machinery moving parts to make the contacts move to realize the connection or disconnection of the control circuit to achieve a certain control purpose. Usually, this type of switch is used to limit the position or stroke of mechanical movement, so that the moving machinery can automatically stop, reverse movement, variable speed movement or automatic round-trip movement according to a certain position or stroke.
In the electrical control system, the function of the position switch is to realize sequence control, positioning control and position state detection. It is used to control the stroke and limit protection of mechanical equipment. Structure: It consists of operating head, contact system and housing.
In actual production, the limit switch is installed in a pre-arranged position. When the module installed on the moving parts of the production machinery hits the limit switch, the contacts of the limit switch act to realize the switching of the circuit. Therefore, the limit switch is an electrical appliance that switches the circuit according to the travel position of the moving part, and its working principle is similar to that of a button.
Limit switches are widely used in various machine tools and hoisting machinery to control their travel and perform terminal limit protection. In the control circuit of the elevator, the limit switch is also used to control the speed of opening and closing the car door, the limit of automatic door opening and closing, and the upper and lower limit protection of the car.
The limit switch can be installed on relatively stationary objects (such as fixed frames, door frames, etc., referred to as still life) or on moving objects (such as vehicles, doors, etc., referred to as animals). When the animal approaches the still life, the connecting rod of the switch drives the contacts of the switch to cause the closed contacts to open or the open contacts to close. The action of the circuit and mechanism is controlled by the change of the open and closed states of the switch contacts.
Limit switches are classified by use
General purpose limit switch: such as JW2, JW2A, LX19, LX31, LXW5, 3SE3 and other series. Mainly used for limit and program control of machine tools and other production machinery, automatic production lines.
Limit switches for lifting equipment, such as LX22, LX33 series. It is mainly used to limit the stroke of lifting equipment and various metallurgical auxiliary machinery.