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USB to 1-Port RS-422, RS-485, RS-530 DB25 Serial Interface Adapter - Sealevel
USB to RS-422/485 Converter FTDI CHIP w/ Terminals
StarTech.com 8 Port Serial Hub Adapter USB to RS232/RS485/RS422 Converter - ICUSB234858I - -
High-Speed RS485 to USB Converter / Adapter
SystemBase - Made In Korea - USB to 1port R422 RS485 USB Serial Cable (USB to RS422 RS485 Adapter), USB 2.0, DB9 Male, Cable 1.96ft(0.6m) Latching USB Connector Applied (Multi-1/USB Combo) : Electronics