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On the other hand, DMX chose a nice round number at what was then the top of the range and added protections to avoid pick up of "ridiculous" frequencies, that we would now consider for actual data. All other nodes receive these data. Currently available high-resistance RS485 inputs allow this number to be expanded to 256.RS485 repeaters are also available which make it possible to increase the number of nodes to several thousands, spanning multiple kilometers.And that with an interface which does not require intelligent network hardware: the implementation on the software side is not much more difficult than with RS232. With such an implementation of a RS485 network it is necessary that there is error detection implemented in the higher level protocol to detect the data corruption and resend the information at a later time.There is no need for the senders to explicity turn the RS485 driver on or off. To avoid reflections on longer cables it is necessary to use appropriate termination resitors. For higher speeds and longer lines, the termination resistances are necessary on both ends of the line to eliminate reflections.Use 100