DB9 Serial Connector Pinout Diagram - RS-232 Pin Assignment Guide #1946703 (License: Personal Use)

This diagram illustrates the pin configuration of a standard DB9 (DE-9) male D-subminiature connector, commonly used for RS-232 serial communication. Pins are numbered from 1 to 9, arranged in two rows (top row: 5-1 left to right; bottom row: 9-6 left to right), with each pin assigned specific signal functions such as TXD, RXD, GND, RTS, CTS, etc. The visual clarity aids quick identification during cable assembly or device interfacing.

Used on technical documentation pages, electronics repair guides, embedded systems tutorials, and hardware specification sheets. Matches user intent for identifying pin functions, building custom serial cables, or debugging communication issues between computers and peripherals like modems, PLCs, or industrial equipment.