Hardware reference guide

Networking
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35013379 11/2011
Tree Topology with Fiber Optic Repeater
Tree topologies, which cannot be established with coaxial cable alone can be built
legally using fiber optic repeaters.
NOTE: The limitations in bus and self-healing configurations are applicable for each
drop in tree topology.
The following illustration shows an example of a tree topology:
NOTE:
z Using 2 optical fiber pairs provides a better service and diagnostics.
z Using only one fiber pair, looping back the unused optical ports with a short fiber
helps using the diagnostics.
For more details on the diagnostics, refer to the Modicon 140NRP95400 Fiber Optic
Repeater Module User Guide.