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.com: StarTech.com 6 ft Professional RS422/485 USB Serial Cable Adapter w/ COM Retention (ICUSB422) : Electronics
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Startech.com 6 Ft Professional Rs422/485 Usb Serial Cable Adapter W/ Com Retention (icusb422) - Serial Adapter - Usb - Rs-422/485 - Walmart.com
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