If you need to connect a serial RS485 device to your computer but your computers doesn't have a serial port, then the easiest and fastest way to do that is by using a USB to RS485 converter.
75bps – 115200bps , up to 6Mbps
Length x Width x Height
61mm x 16mm x 13mm
Windows XP , Vista, Windows 7/8 , Linux , MacOS
-40°C ~ +85°C
Communication distance up to 1.2KM