RS-232 PC Serial DE-9

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DE9 male connector 9 pin DE9 male connector at the computer.

10 PIN internal connector 10 pin IDC male connector at motherboard.

DE9 Pin IDC 10 Pin Name Dir Description
1 1 CD IN Carrier Detect
2 3 RXD IN Receive Data
3 5 TXD OUT Transmit Data
4 7 DTR OUT Data Terminal Ready
5 9 GND - System Ground
6 2 DSR IN Data Set Ready
7 4 RTS OUT Request to Send
8 6 CTS IN Clear to Send
9 8 RI IN Ring Indicator


  • Direction is DTE (Computer) relative DCE (Modem)


Category:Serial Connectors


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