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DB9 connector

DB-25
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Connettore DB9 Conetor DB9 Steckverbinder DB9 Connecteur DB9 Conector DB9

DB9 connector

The DB9 (originally DE-9) connector is an analog 9-pin plug of the D-Subminiature connector family (D-Sub or Sub-D).

The DB9 connector is mainly used for serial connections, allowing for the asynchronous transmission of data as provided for by standard RS-232 (RS-232C).

DB9 plugs

Note that there are DB9-DB25 adapters for easily converting a DB9 plug into a DB25, and vice versa.

Pins

Pin number Name
1 CD - Carrier Detect
2 RXD - Receive Data
3 TXD - Transmit Data
4 DTR - Data Terminal Ready
5 GND - Signal Ground
6 DSR - Data Set Ready
7 RTS - Request To Send
8 CTS - Clear To Send
9 RI - Ring Indicator
  Shield


Last update on Thursday October 16, 2008 02:43:14 PM.This document entitled « DB9 connector » from Kioskea (en.kioskea.net) is made available under the Creative Commons license. You can copy, modify copies of this page, under the conditions stipulated by the licence, as this note appears clearly.
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