4.1 Line topology
19
4 Network topologies
OZD Profi G12D... ATEX 1 V. 03 07/2014
4 Network topologies
Following network topologies are possible with OZD
Profi G12D... ATEX 1:
Point to point connection
Line topology
Star topology
Redundant optical ring
Even combinations from these basic types are possible.
For building up fibre optic paths of these network
topologies lines with two optical fibres are used.
If a fault occurs – e. g. breakage of fibre optic line – high
failure safety of the fieldbus network is required,
availability of the network is increased by a redundant
network configuration.
Kindly note:
Individual terminal equipments or complete
PROFIBUS segments with max. 31 stations can be
connected to OZD Profi G12D...ATEX 1.
Lay only fibre optic cables in severe EMC-risk
areas in order to rule out EMC influences in the
entire network.
Optical channels, which are connected to each
other via fibre optic cable, must have the same
operating mode set.
4.1 Line topology
CH 2
SE
CH 3
SE
CH 2
SE
CH 3
SE
CH 2
SE
CH 3
SE
OZD Profi G12D...
ATEX 1
OZD Profi G12D...
ATEX 1
CH 1
CH 1
Terminal equipment/
bus segment
OZD Profi G12D...
ATEX 1
CH 1
Terminal equipment/
bus segment
Terminal equipment/
bus segment
CH 2
SE
CH 3
SE
OZD Profi G12D...
ATEX 1
CH 1
Terminal equipment/
bus segment
RS 485-type bus
Optical fibre
Fig. 4: Network structure in the optical line topology