D-sub connector: Difference between revisions
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See [https://en.wikipedia.org/wiki/D-subminiature Wikipedia] for details. | See [https://en.wikipedia.org/wiki/D-subminiature Wikipedia] for details. | ||
They were ubiquitous in computer applications from the 1960s to the early 21st century and are still in widespread use in industrial applications. | They were ubiquitous in computer applications from the 1960s to the early 21st century and are still in widespread use in industrial applications. Many data communication standards specify D-sub connectors, e.g [https://en.wikipedia.org/wiki/RS-232 V.24/RS-232] (DB-25 connector), [https://en.wikipedia.org/wiki/X.21 X.21] (DA-15 connector), etc. | ||
There are five basic shell sizes, DA through DE (see illustration). Originally, all versions except DD had two rows of contacts. Later, "high density" versions with extra rows were added, the most widely used of which is the familiar DE-15 VGA connector. | There are five basic shell sizes, DA through DE (see illustration). Originally, all versions except DD had two rows of contacts. Later, "high density" versions with extra rows were added, the most widely used of which is the familiar DE-15 VGA connector. | ||