Grid Connect has USB to Serial Adapter for you. We offer RS232 to USB, RS422 to USB, and RS485 to USB solutions. If you have tried a low cost USB to Serial Adapter and had issues in the past, check out our USB232. It features an advanced EXAR chipset which works in many scenarios where lower cost adapters fail.
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RS485 USB Adapter w/RS422 to USB Support - BF-850List Price: $0.00Your Price: $49.95 As low as: $42.00
RS232 to USB - ATC-850 Industrial USB to Serial RS232/422/485 AdapterList Price: $0.00Your Price: $79.95
Serial to USB Converter - ADAM 4561-CEList Price: $0.00Your Price: $140.00