Hirschmann OZD FIP G3, Manual, Page: 32 / 63

2 Network Topologies 2.1 Redundant optical ring (two-fiber ring)
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OZD FIP G3 … Version 3.2 08/07
Fig. 3: Alternative wiring system for network structure in redundant optical two-fiber ring topology
FIP bus line
Fiber optic cable
Terminal unit(s)/
bus segment(s)
Port 3
T R
OZD FIP G3 …
Port 2
T R
Port 1
Terminal unit(s)/
bus segment(s)
Port 3
T R
OZD FIP G3 …
Port 2
T R
Port 1
Terminal unit(s)/
bus segment(s)
Port 3
T R
OZD FIP G3 …
Port 2
T R
Port 1
Terminal unit(s)/
bus segment(s)
Port 3
T R
OZD FIP G3 …
Port 2
T R
Port 1
Terminal unit(s)/
bus segment(s)
Port 3
T R
OZD FIP G3 …
Port 2
T R
Port 1
If problems are encountered with the configuration
of a redundant optical ring on account of excessively
long fiber-optic line sections, connections can also be
implemented as shown in Fig. 3.
In this case, each repeater is linked (in spatial terms) with the next repeater but one. Two adjacent repeaters must
be interconnected at the start and end of every such line.
This avoids individual “excessively long“ fiber-optic line
sections.