SPT USB to RS85 Converter with Ftdi Chipset
SPT Security USB Converter translates the RS-485 signal from the meters to a signal that can be understood by your computer. This converter uses a chip that is manufactured by FTDI, which is much more robust, reliable, and easier to use than competing chips. No power is required. It is built with 2KV surge protection and 15KV electrostatic discharge. You can connect up to 256 m on 4000 ft. of twisted pair wire to this converter.