The USB-RS485 adaptor is a USB to RS485 level serial UART converter device incorporating FTDIs FT232RQ USB to Serial UART interface IC device which handles all the USB signalling and
protocols. The adaptor provides a fast, simple way to connect devices with a RS485 interface to USB. Each USB-RS485 adaptor contains a small internal electronic circuit board, utilising the
FT232R plus a USB type-B connector. The integrated electronics also include an RS485 transceiver plus optional Tx and Rx LEDs which give a visual indication of UART traffic.
The adaptor is USB powered and USB 2.0 full speed compatible. Each adaptor supports a data transfer rate up to 3 Mbaud and supports the FTDIChip-ID™, with a unique USB serial number
programmed into the FT232R. This feature can be used to create a security or password protected file transfer access. Further information and examples on this feature are
available at http://www.ftdichip.com under FTDIChip-ID Projects. The USB-RS485 adapter requires USB drivers, available free from http://www.ftdichip.com, which are used to make
the FT232R in the adaptor appear as a virtual COM port (VCP). This then allows the user to communicate with the USB interface via a standard PC serial emulation port (for example TTY).
Another FTDI USB driver, the D2XX driver, can also be used with application software to directly access the FT232R in the adaptor though a DLL.
The USB-RS485 adaptor is inclosed in transparent (red) plastic case (ABS).