D-subminiature connector

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D-subminiature connector
D-subminiature connector.jpg
Male DE-9 connector
Type data connector

A D-subminiature connector is a data connector. the most common is the DE-9 connector used for RS-232 connections.

Common Pinouts

DE9 RS-232

1DCDCarrier detector
2RXdata to host
3TXdata from host
4DTRdata terminal ready
5GNDcommon ground
6DSRData set ready
7RTSRequest to send
8CTSClear to send
9RIRing indicator