21HE63-R

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Snap Action, Limit Switches are commonly used across many industries. The 21HE63-R is a model of Snap Action, Limit Switch which has several useful features. It is designed for use in hazardous and non-hazardous areas and is known for its superior reliability and performance. This article will discuss the application field and working principle of the 21HE63-R.

Application Field

The 21HE63-R is designed for use in applications where space for installation is a consideration. It is a single pole, double throw (SPDT) limit switch and can be used in applications where space must be conserved. It can be used in applications with IP66 environmental protection, such as locations subject to dust and moisture. It is also suitable for use in all industrial machinery, such as printing, packaging, and injection molding machines.

The 21HE63-R is also appropriate for use in applications such as elevators, hoists, fan and blower motors, and conveyors. It is suitable for both manual and machine-based applications. The switch is available with a range of actuators and is UL listed. The 21HE63-R is designed for both safety and high cycle life. It is CE certified for use in EU and compatible countries.

Working Principle

The 21HE63-R is a snap action, limit switch. This type of switch is designed with a lever arm that, when activated, causes the switch to either open or close the circuit. This is the simplest form of a basic on/off switch. A lever arm swings taught with the force of a spring, holding the switch open. When the lever arm is pushed beyond a predetermined limit, it clicks into place in a different position and the switch is closed.

The 21HE63-R can also be constructed with an actuator, which is a mechanical device used to actuate a limit switch. This actuator can be activated manually, by a cam, or by another mechanical device. The design and construction of the actuator vary depending on the application. The actuator works to mechanically cover the switch contacts and allow the contacts to form an electrical circuit when the limit is reached.

The 21HE63-R is a reliable and cost effective solution for applications requiring snap action, limit switches. Its simple design and construction makes it a reliable and durable device. Its versatility and ability to be used in multiple applications make it a great choice for use in hazardous, industrial and non-hazardous settings. Its UL listing makes it suitable for use in areas subject to dust and moisture and its CE certification ensures that it is compliant with EU standards.

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