25 Pin Rs232 Wiring Diagram. Rd receive data it receives data from dce data communication equipment and pass to dte data terminal equipment. 4 pin usb a usb b mini usb jack connector at the computers usb cable.
The rs232 protocol uses a 9 pin serial port that can have either male or female connectors. Also the rs232 9pin configuration is quite sufficient in most circumstances because many of the lines available for rs232 signalling are rarely used. Pinout of null modem cables and layout of 9 pin d sub female connector and 25 pin d sub female connectorde 9 to de 9 de 9 to de 25 cables.
As most of the computers are equipped with the db9 serial port version all wiring examples on.
Rs232 pin description microcontroller interfacing and applications. The tb standard is the most commonly used. A serial pinout diagram is presented below. Pin connections db9 9 way db25 25 way.