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FTDI's DB9-USB-RS232 modules are designed to directly replace an existing DB9 (the industry accepted name for a DE9 connector) RS232 connection with a drop-in USB replacement connection. Pin for pin, these modules will replace a male or female DB9 RS232 connector with a USB mini-B connector. The application PCB containing the existing DB9 RS232 connector does not require any modification, only the replacement of the D-type connector with the appropriate DB9-USB-RS232 module. A male DB9 should be replaced by a male DB9-USB-RS232-M and a female DB9 should be replaced by a female DB9-USB-RS232-F. The modules contain all necessary electronics to convert between USB and RS232.