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D-sub connectors, also known as D-shaped connectors, come in a variety of sizes and are used in various industries such as telecommunications, computers, and industrial automation. Connectors of this type can be divided into two main categories: backing shells and hoods.

Backshells

Backshells are installable on the rear side of a D-sub connector, providing strain relief and cable/connector protection, and helping to make the connection more reliable and robust. The purpose of the backshell is to prevent damage to the cables when pulled or to protect the device when bumped, as well as to reduce interference and noise. Backshells are available in different shapes and sizes and usually include a flexibility relief boot to ease stress due to cable movement.

Hoods

Hoods, like backshells, are typically used in a cable/connector combination to protect it from physical abuse and contamination. Hoods can be hand-made or provide a more professional manufactured look, depending on the specific application. For non-ruggedized applications, the connector is typically overmolded with plastic or metal. The hood may also be used to terminate two or more cables for a secure connection.

Application Field and Working Principle

D-sub connectors are used in a wide range of applications, such as in the industrial automation industry to connect components of machines and robots. Thanks to its common shape, it is also found in consumer electronics, such as computer gaming systems, video cameras, and home entertainment systems. In addition, D-sub connectors are used in medical equipment, telecommunications, and aerospace.

The working principle of the D-Sub connector is based on the principle of electric conduction, using copper plating on the contact\'s surface. This contact surface then is pressed against a mating with a steel pin when inserted in it. When properly connected, the electric current flows from one pin to another. The number of poles, or contacts, varies depending on the specific requirements of the specific application.

Conclusion

D-sub connectors, also known as D-shaped connectors, are widely used in a variety of industries and are available in different shapes and sizes. The two main components, backshells and hoods, provide strain relief, protection and a secure connection. The working principle of the D-sub connector relies on the principle of electric conduction, using copper and steel pins that are inserted in the mating. A wide range of applications is possible with the help of the D-Sub connectors, from industrial automation to consumer electronics and telecoms.

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