8021-12-01

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Reed Relays

Reed relays are electrical switches that use an electromagnet to control one or more sets of contacts. They are voltage-operated and can be used in a variety of applications, including communications, computer programming, and industrial automation. The use of reed relays has several advantages over mechanical switches, including greater reliability, longer life, and less contact chatter.

8021-12-01 Application Field and Working Principle

Reed relays are used in a variety of applications, including telecommunications, programming, and industrial automation. In telecommunications, reed relays are used to route analog and digital signals to and from various pieces of equipment. These relays are also used to protect telephone lines from overloads, and to indicate presence and status of lines.

In programming, reed relays are used to form electrical connections in the process of writing computer programs. They are also used to control the voltage levels of microprocessors and other electronic components. In industrial automation, reed relays are used to control actuators which are used to convert signals from mechanical to electrical.

The working principle of reed relays involves the use of an electromagnet to move the armature, which is attached to one or more sets of contacts. When an electric current is passed through the electromagnet, it produces a magnetic field that draws the armature downward, causing the contacts to open or close. Once the current is removed, the armature is released and the contacts resume their default position.

In most reed relays, the contacts are enclosed in a vacuum-sealed glass tube, or envelope, to provide insulation and prevent corrosion. The contacts are usually made of a mixture of copper, silver, and nickel. Reed relays can be used in a variety of configurations, including normally open (N/O), normally closed (N/C), and isolated (I/O).

Reed relays have been around for many years and have been used in a variety of applications. They are highly reliable, have long life spans, and are very dependable. In addition, they require minimal maintenance, since they do not suffer from contact wear or require frequent cleaning.

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