RS-232

First published1960
DomainElectronics and Connectors
StatusLegacy, still common in industrial equipment

About RS-232

The serial interface standard first issued by the Electronic Industries Association in 1960, defining signal voltages and, from later revisions, the 25 pin connector. PC makers popularized a smaller 9 pin version. It connected terminals, modems and mice through the PC era and survives in industrial machinery, point of sale and laboratory gear.

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