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D-Sub, D-Shaped Connectors - Contacts are the most common type of connectors used for serial data transmission. These connectors are widely used in computer networks and industrial communications due to their versatility. They come in many sizes and configurations, which makes them well-suited for a variety of applications ranging from simple data transfer to complex systems.

D-sub connectors are composed of two parts: the connector body and the contact. The contact is responsible for the electrical connection between the two components while the connector body provides mechanical support. The most common contact materials used in D-sub connectors are copper, brass, silver, gold, silver plated copper, and tin plated steel.

D-sub connectors are designed to fit into a pair of computer ports, allowing easy connection and disconnection. The contact pins are arranged horizontally in a row or in a matrix, depending on the application and the desired configuration. Although the basic design is the same for all D-sub connectors, the pin layout and number of contacts will vary according to the application.

D-sub connectors are commonly used in computer networks, such as Ethernet and USB ports, as well as for other serial communications, including RS232, RS422, and RS485. They are also widely used in industrial control systems, including instrumentation, PLCs and automation.

The primary function of D-Sub, D-Shaped Connectors - Contacts is to connect the two different ends of a communication path. The physical form factor of the connector body and the number of contacts are determined by the application. For example, the popular DB9 connector has 9 contacts and is usually used for transferring data in RS232 applications. Other popular interfaces include the DB25 (25 contacts), DB37 (37 contacts) and DB50 (50 contacts).

The working principle of a D-sub connector is quite simple. When two mating contacts are brought together, an electrical current is created that allows the signal to be transmitted. The contacts are made of conducting material, usually copper or steel, which transfers the current from one device to the other. These contacts will remain connected until the force of the opposing ends is strong enough to break the connection, which can often be caused by stress or mechanical shock.

D-sub connectors are used in many different applications, from computer networks to industrial control systems. In addition, they are known for their reliability and stability. They are also relatively easy to disconnect and re-attach, making them ideal for applications where frequent connection and disconnection are necessary.

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