21SM284-T2

21SM284-T2 Application Field and Working Principle

21SM284-T2 is a type of snap action, limit switch developed by ABB, a leading global supplier of products, systems and services in industrial power and automation. The switch has earned a reputation as incredibly reliable since it was first introduced in the market. 21SM284-T2 switches are prized for their excellent performance in extreme conditions and are suitable for a wide variety of applications, from HVAC, OEM, and industrial manufacturing to food service, material handling, and automotive industries.

Application Areas

21SM284-T2 switches are most often used in applications where high levels of precision and reliability are required. They are especially suitable for applications where they are expected to be subjected to high levels of shock or vibration and operate successfully in extreme environments where other limit switches may struggle. HVAC, OEM and industrial applications are some of the most common applications for these switches. Some other notable instances of 21SM284-T2 application include food processing, material handling, and automotive industries.

Working Principle

The existing 21SM284-T2 switch consists of a formable push-button actuator with a detachable cover that is housed in a spring-loaded cassette. When pressure is applied to the push-button actuator, it deforms and introduces a contact element positioned within the spring-loaded cassette. The encasement of this switch is designed with a top and bottom cover with several latching points, providing excellent protection for the internal components. As the actuator actuates, a contact element is forced against an electrical contact, creating an electrical circuit and sending the signal to control the desired action.

The most common application of 21SM284-T2 switches are limit switches, which are used as safety devices in industrial and commercial environments. They can be found in machines, vehicles and other equipment to signal when a predetermined limit has been reached or a given process or task has been completed. They are particularly suited to applications where accuracy and reproducibility is needed, such as those found in HVAC or OEM production.

Related Products

ABB also produces a wide range of related products, such as the 21SM380-T2, which is another type of snap-action, limit switch. The 21SM380-T2 also features a formable push-button actuator and provides similar performance as the 21SM284-T2. It also has a latching cover for added protection. Other models in the line include the 22SM460-T2, which adds a red indicating button and the 23SM422-T2, which adds a blue indicating button.

The 21SM284-T2 is an incredibly reliable and reliable snap-action, limit switch. It is suitable for a wide variety of applications and is especially well-suited for applications requiring precision and reliability. With a range of related products, ABB is able to provide a limit switch solution to suit any specific requirement.