3.1 Line topology
13
3 Network Topologies
Version 04 05/2014
3 Network Topologies
The following network topologies can be realized with the
OZD Profi 12M … PRO:
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Point-to-point connections
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Line topologies
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Star topologies
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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:
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Single terminals or entire PROFIBUS segments
with max. 31 subscribers can be connected to the
electrical interface of the OZD Profi 12M … PRO.
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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.
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Optically
only OZD Profi 12M … PRO of the
same type
can be connected together:
– OZD Profi 12M
P11
PRO with
…
P12
PRO
– OZD Profi 12M
G11
PRO with
…
G12
PRO and …
G12 EEC
PRO
– OZD Profi 12M
G11-1300
PRO with
…
G12-1300
PRO and …
G12-1300 EEC
PRO
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Optical channels which are connected by optical
fiber must be set to the same operating mode.
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Junctions between different OZD Profi 12M … PRO
types are only possible via the RS485 interface.
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OZD Profi 12M G12(-1300) EEC PRO can be used
everywhere in those network topologies described
below in which a OZD Profi 12M G12(-1300) PRO
can also be used.
3.1 Line topology
Fig. 2: Network structure in an optical line topology
Ch 1
Ch 2
Terminal unit(s) /
bus segment
OZD …
P1
1
PRO
G1
1
(-1300) PRO
Ch 1
Ch 2
Terminal unit(s) /
bus segment
OZD …
P1
1
PRO
G1
1
(-1300) PRO
Ch 1
Terminal unit(s) /
bus segment
OZD …
P1
2
PRO
G1
2
(-1300) PRO
Ch 3
Ch 2