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D-Sub, D-Shaped Connectors - Contacts

D-Sub connectors are D-shaped connector assemblies that uses a combination of pins, sockets, and coaxial contacts to provide a wide range of connection points for many types of electrical devices and systems. The connectors can be used with a variety of communication and control signals, such as audio, video, digital data, and analog signals. The connectors are available in several standard configurations, including the DB-9, DB-15, and DB-25, as well as many other specialized configurations.

The most common type of contacts for these connectors are pins and sockets. Pins are typically inserted into a female socket to make electrical contact, while the sockets accept the pins. Pins come in a variety of shapes and sizes in order to provide a range of connection options, and sockets may be embedded in a housing to provide mechanical strength and protection.

As well as pins and sockets, D-Sub connectors can also contain other types of contacts. Coaxial contacts provide a reliable connection for carrying RF (radio frequency) signals. THick film and thermocouple contacts are commonly used for low-level voltage and temperature measurements, respectively. Additionally, coaxial and shielded contacts may be used to provide EMC safety (electromagnetic compatibility).

D-Sub connectors can be used in a wide range of PC (personal computer) applications. They are commonly used in communication and control systems, such as serial ports for modems and keyboards. They can also be used for video signal connections, MIDI (Musical Instrument Digital Interface) ports, Audio and USB (Universal Serial Bus) ports, and other types of computer connections. Some D-Sub connectors may also be used for external power connections.

The working principle of a D-Sub connector is fairly straightforward, and generally involves physical contact between the pins or sockets, and between the contact surfaces and the conductive surfaces on the connector. The contacts are pressed against each other with a variety of mechanisms, depending on the type of contact and the application. For pins and sockets, the force is usually provided through a screw-down mechanical assembly, while coaxial and other types of contacts rely on clamping force from the connector body itself.

In addition to making the physical contact, the contacts must also ensure a good electrical connection, free of static electricity and other interference. This is usually accomplished through an electrically insulating layer between the contacts, which helps to reduce the risk of electrical arcing or shorts. Additionally, contacts may use a corrugated, spring-loaded design to further improve electrical contact integrity.

Overall, D-Sub connectors can provide a convenient and reliable way to connect both electrical and communication devices. They come in several standard configurations, as well as many specialized configurations, and can accommodate a range of contact types. In addition, these connectors are particularly well-suited for PC applications, and are easy to use and install.

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