69822 Goobay - USB to RS232 converter | D-Sub 9pin male,USB A plug; USB 2.0; USB/RS232 | TME - Electronic components
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Industrial Grade Usb-rs485 Rs422 Rs232 Signal Converter Ftdi Chip Isolated Module Usb To Rs232/422/485 Magnetic Isolation - Electrical Wires - AliExpress
USB to RS-232 2-Port DB9 Serial Adapter/Converter Multi-2/USB RS232 – Envistia Mall
LM060-0613 Lm Technologies, Adaptor, USB - RS232 Converter Adapter, FTDI | Farnell France
USB to RS-232 DB9 Serial Adapter/Converter Systembase Multi-1/USB RS232 | eBay
Amazon.com: UGREEN USB to RS232 Adapter Serial Cable DB9 Male 9 Pin with PL2303 Chipset RS-232 Converter Cable for Windows 10 8.1 8 7 XP Vista, Mac OS, Linux, 3FT : Electronics
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Industrial Grade USB RS485 USB RS422 USB RS232 Conversion Signal Converter Module USB TO RS232/422/485 USB 485/422 USB 232/485|Wires & Cables| - AliExpress