Hirschmann OZD Profi 12M - Star Topology

3 Network Topologies 3.2 Star topology
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Version 2.4 04/07
3.2 Star topology
Fig. 3: Network structure in an optic star topology
Terminal unit /
bus segment
Terminal unit /
bus segment
Terminal unit /
bus segment
Terminal unit /
bus segment
Terminal unit /
bus segment
CH 2
TR
OZD … P11
CH 1
CH 2
TR
OZD … P11
CH 1
CH 2
TR
CH 3
TR
OZD … G12
CH 1
CH 2
TR
OZD … G11-1300
CH 1
OZD … P11
CH 2
TR
CH 1
OZD … G11-1300
CH 2
TR
CH 1
OZD … P11
CH 2
TR
CH 1
OZD … G11
CH 2
TR
CH 1
OZD … G11
CH 2
TR
CH 1
Electrical star segment
S0 = 1 S0 = 1 S0 = 1 S0 = 1
RS 485 bus line
Optical fiber
Several modules are combined to form an active PROFI-
BUS star coupler. Other modules are connected to this
by dual-fiber optical fiber lines. The modules of the star
coupler are connected to one another via the electrical
port (electrical star segment).
All OZD Profi types for different fiber types (plastic, PCF,
glass) can be combined using the electrical star segment.
Please note:
䡲 CH1 in mode ”Monitor off“ (S0 = 1) must be acti-
vated on all OZD Profi 12M … which are connected
to the electrical star segment. This deactivates the
segmenting function of the RS 485 port on these
OZD Profi 12M …, providing a high degree of avail-
ability of the electrical star segment.