Serially connected RS485 controllers must be connected to the main PC/server via a comms line header. This can be a USB or an ethernet converter.
A USB converter is ‘hard-wired’ from a USB port and converts JANUS communications protocol to RS485. A USB converter is suitable for driving up to 1,200Mtrs on 2 or 4-wire copper cable.
Multiple USB converters may be connected to the same JANUS access system utilising additional USB2 ports on the Site Controller or the main PC/server.