21CX12

Series:	*
Part Status:	Obsolete

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21CX12 Application Field and Working PrincipleSnap action, limit switches are versatile and reliable units capable of sensing the presence or absence of an object in an operating environment. These switches have found widespread use in programmable logic controllers (PLCs), alarms, sensors, and various types of industrial automation equipment. This article aims to explain the application field and working principle of the 21CX12 snap action limit switch.ApplicationsThe 21CX12 snap action limit switch can be used in a variety of industries and applications. It can be used to detect the presence of a object in a production line, in an assembly line, in a warehouse, and in any industrial automation application. The switch can also be used to monitor the position of a conveyor, a machine, or an assembly line part.In addition, the switch can be used as a part of a door open/close detection system. It can be used as an interlock switch in operations where certain parameters (such as speed, temperature, or movement) need to be monitored. Finally, it can be used in hazardous environments where explosion or fire proof designs are necessary.Working PrincipleThe 21CX12 snap action limit switch is comprised of a series of steel plates connected by a single wire with alternating current applied. When the alternating current passes through the wire, the steel plates create a magnetic field around the switch. When an object comes into contact with the switch, the steel plates move, creating an electric contact between them. This electric contact then triggers an internal switch, activating a signal that is sent to explore the position of the object.The 21CX12 snap action limit switch operates by the plunger type. When an object comes into contact with the switch, the plunger is displaced and the contacts are triggered. The contact can be either open or closed depending on the position of the plunger.The 21CX12 snap action limit switch also has a built-in shock absorber that reduces noises and helps protect the switch from damage due to shock and vibration. The switch also has an auxiliary contact which can be used for auxiliary control for external alarms and signaling.ConclusionThe 21CX12 snap action limit switch is a versatile and reliable device suitable for a variety of industrial applications. It operates by a plunger type mechanism and has built-in shock absorbers to reduce vibrations and noise. The switch also has an auxiliary contact which provides additional control for external alarms and signaling. The switch is designed for easy installation, and it is capable of providing accurate and reliable measurements.

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