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This product has 2 related files, and can be downloaded for free.

  1. Prolific Driver (ZIP)
  2. Version 2 Driver ch341ser - Arduino AND RS-485 to USB (ZIP)

Product Description


USB to RS485 Converter / Adapter
Controlling / Communicating with RS-485 devices from your PC has never been easier! This device is plug-and-play - It shows up as a serial/com port and can be accessed from applications or hyper-terminal. This converter provides half-duplex RS-485 communication. The Baud rate range is 75 bps to 115200 bps, maximum up to 6 Mbps. No external power is required for operation.

This adapter has the following connections:

  • USB A Male
  • Screw Terminal Block (2 Terminals (20AWG - 26AWG Wire))

This device uses the widely supported CH340 USB to Serial driver chip, and is supported in all major operating systems (WinXP, 7, 8, Windows 10), Linux, Mac OSX. QTY: 1 x USB to RS-485 Converter

IMPORTANT NOTE: This comes in two different versions depending on where we order it. Version one has a Prolific chip in it and you MUST download and use the "Prolific Driver". Version 2 with a CH340 chip, for which you MUST download and use the "DOWNLOAD ch341ser DRIVER". In either case, you must run the driver installer as an administrator, then, once installed you must use device manager to determine the COM port that is assigned to the RS-485 adapter. It will be listed under COM and LPT ports.




Click here to read the California regulatory warning.