Belden HIRSCHMANN OZD Modbus Plus G12 Manuel page 36

2 Network Topologies
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
E S E S
Port 2 Port 3
OZD Modbus
Plus G12 ...
Terminal unit(s)/
bus segment(s)
Modbus Plus bus line
Fiber optic cable
6Fig. 3: Alternative wiring system for network structure in redundant optical two-fiber ring topology
34
E S E S
Port 2 Port 3
E S
OZD Modbus
Port 2
Plus G12 ...
OZD Modbus
Plus G12 ...
Terminal unit(s)/
bus segment(s)
Terminal unit(s)/
bus segment(s)
2.1 Redundant optical ring (HIPER-Ring*)
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.
E S E S
Port 2 Port 3
E S
OZD Modbus
Port 3
Plus G12 ...
Terminal unit(s)/
bus segment(s)
E S E S
Port 2 Port 3
OZD Modbus
Plus G12 ...
Terminal unit(s)/
bus segment(s)
Version 04 07/2014