INOR PROFIPAQ-L - Manual (Page 5)

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1.3 About PROFIBUS
PROFIBUS-PA is an all-digital, serial, two-way communication system that interconnects
field equipment such as sensors, actuators, and controllers. Power supply and output digital
signal uses the same two wires. The physical layer is described in EN 61158-2 and the
protocol in EN 50170.
For more information concerning PROFIBUS, visit the PROFIBUS organization homepage at
address www.profibus.com . There you find a lot of information about the PROFIBUS
protocol, PROFIBUS tools, PROFIBUS news, GSD and DDL’s, competence center, FAQ’s and
more and there is a lot of interesting PDF’s for downloading.