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Backplane connectors are electrical connectors used for attaching additional printed circuit boards to systems operating through a motherboard. DIN 41612 connectors, also known as Eurocard connectors, are backplane connectors commonly used in telecommunication systems. They belong to the category of "Compact Printed Board Connectors". They are usually made of metal and plastic and are designed to easily accommodate any type of printed circuit board.

The application field of DIN 41612 connectors is vast and includes uses in telecommunications, audio-visual equipment, industrial controllers, and laboratory and testing equipment. The typical working principle of a DIN 41612 connector involves two spring-loaded contacts at each contact point. These contacts make electrical connection when the connector is mated. One of the contacts is known as a floating contact and is pushed out or drawn in depending on the contact force of the mating parts. The contact is spring-loaded and therefore more or less effectively reseats when the two mating parts are disconnected.

For additional stability, some form of keying system, such as the D-shaped metallic strip found in some versions of the DIN 41612, is often used. This ensures that two circuits do not make contact with each other or that the wrong connector is not mated. Another important feature of DIN 41612 connectors is the galvanic isolation between two board systems. This means that an electrical signal from one board cannot travel into the other, thereby preventing short circuits and other problems.

A drawback of DIN 41612 connectors is the fact that they can only support low frequencies due to their construction. Because of this, they are not suitable for applications requiring high frequency signals. Furthermore, like all other connector types, they have limited durability and need to be plugged together with care. Over time or due to frequent use, the connectors may become worn or corroded.

In conclusion, DIN 41612 connectors are widely used backplane connectors with numerous applications in the telecommunications, industrial and audio-visual fields. Their working principle relies on two spring-loaded contacts and a keying system for additional stability. The galvanic isolation between board systems is another advantageous feature of these connectors. However, they have limited durability and can only support low frequencies, making them unsuitable for some applications.

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