GE PACSystems RSTi Manual page 46

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The maximum admissible distance between two bus stations in each PROFIBUS network
can be calculated as follows:
(NO_REP+1)*Segment length,
Where NO_REP =The maximum number of repeaters connected in series (depends on
repeater type).
Example: The repeater manufacture specifications allow nine repeaters to be connected
in series. The maximum distance between two bus stations at a data transfer rate of 1500
kbit/s is then as follow:
(9+1)*200m=2000 m
RSTi Network Adapter Manual User Manual - January 2012 GFK-2746