If you have a MALE with a DCE pinout, it will need to connect to a FEMALE with a DTE pinout.įor RS232, any DTE-DTE or DCE-DCE connection should use a null modem.Īny Male-Male or Female-Female connection will require a gender changer. If you have a MALE with a DTE pinout, it will need to connect to a FEMALE with a DCE pinout. Take the details you know about the current connector and apply the opposite to find the right mate. Note: - In most cases a Male will be a DTE and a Female will be DCEįrom these two details you should be able to find the right pin combination for your device. Notice how the pin arrangement puts Tx to Rx, DTR to DSR, and RTS to CTS. Some equipment may require the additional control pins.
In most cases a Male will be DTE and a Female will be DCE, but not always. For a basic RS232 connection, you will only need Rx, Tx and Ground. There are two standard pinout arrangements for the DB-9 connector, DTE and DCE. The Male connector has pins and the Female connector has sockets. The pins are numbered oppositely when looking directly at the connectors. The two main things to be concerned about are the pinout and the gender. There are a lot of details to consider when arranging the pins between Male and Female connectors on a serial cable or serial device. The pinout of the DB-9 connector can be confusing when cabling an RS232 line.
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