StarTech.com 6ft RS422 RS485 USB to Serial Cable Adapter w/ COM Retention - ICUSB422 - Serial Cables - CDW.com
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Amazon.com: Songhe TTL to RS485 Module 485 to Serial UART Level Mutual Conversion Hardware Automatic Flow Control Module TTL Turn to RS485 Module 3.3V-5.5V (5pcs) : Electronics
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Amazon.com: USB to RS422 RS485 2 Port Plug-and-Play Adapter Converter ATEN UC485, up to 921.6 Kbps, Supports Windows Vista / 7 and Above, Mac and Linux, Terminal/Echo Mode by Mode, UK, 1
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