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 |