StarTech.com USB to RS232/RS485/RS422 Industrial 4 Port Serial Hub Adapter - USB to Serial Converter - ICUSB234854I - USB Adapters - CDW.com
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Amazon.co.jp: DTECH USB to RS422 RS485 Serial Port Converter Adapter Cable 1.2m Built-in FTDI Chipset Compatible with Windows 10 8 7 XP Linux Mac and More : Computers
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