3.1 Line topology
9
3 Network Topologies
Version 2.4 04/07
3 Network Topologies
The following network topologies can be realized with the
OZD Profi 12M … :
䡲 Point-to-point connections
䡲 Line topologies
䡲 Star topologies
䡲 Redundant optical rings
Combinations of these basic types are also possible.
Lines with two optical fibers are used to create the fiber
links for these network topologies.
If a malfunction – e.g. a break in a fiber line – makes a
high degree of field bus network fail-safety necessary,
the availability of the network can be increased using a
redundant network configuration.
Please note:
䡲 Single terminals or entire PROFIBUS segments
with max. 31 subscribers can be connected to the
electrical interface of the OZD Profi 12M … .
䡲 In areas with a high EMC incidence, only lay opti-
cal fiber lines in order to exclude the possibility of
EMC affecting the whole network.
䡲 Optically only OZD Profi 12M … of the same
type can be connected together:
– OZD Profi 12M P11 with … P12
– OZD Profi 12M G11 with … G12 and …G12 EEC
– OZD Profi 12M G11-1300 with … G12-1300
and …G12-1300 EEC
䡲 Optical ports which are connected by optical fiber
must be set to the same operating mode.
䡲 Junctions between different OZD Profi 12M …
types are only possible via the RS485 interface.
䡲 OZD Profi 12M G12(-1300) EEC can be used every-
where in those network topologies described
below in which a OZD Profi 12M G12(-1300) can
also be used.
3.1 Line topology
Fig. 2: Network structure in an optical line topology
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