UGREEN 40391 USB to RS-232 Adapter

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Overview

USB to RS-232 adapter, based on an FTDI chipset. It has a male DE9 pinout with female jackscrews, similar to a native RS-232 port on a computer.

Wiring Diagram

DE9 Pin Function Direction
1 DCD PC ← device
2 RXD PC ← device
3 TXD PC → device
4 DTR PC → device
5 GND PC ↔ device
6 DSR PC ← device
7 RTS PC → device
8 CTS PC ← device
9 RI PC ← device
(shield) shield PC ↔ device

Online Resources

UGREEN USB to DB9 RS232 Cable Converter, USB 2.0 to Serial Adapter Hexnuts Male with FTDI Chipset | Amazon