D-subminiature connector/RS232 DE-9

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Pinout for RS-232 on a DE-9 D-subminiature connector.

Pinout

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