Commissioning
2
0
1
8
-1
2
29
5.2
Topology
The optical data coupler does not contain any address routing logic. As a result,
the distribution of the information must always be controlled by an external
network switch. The internal Ethernet adapter is permanently set to 100 MBit full
duplex, as this is the only format that is converted for the optical transmission. Any
adjustments required to connection modes must be made using the external
network switch.
The pair of optical data couplers effectively replaces a cable. The maximum cable
lengths always relate to the distance from the optical data coupler to the relevant
network switch. The signal propagation delay depends on the physical distance
between the two optical data couplers. The runtime is 3.3 ns for each meter of
light path.
Figure 5.8
Topology
F1
F1
F1
F1
F2
F2
F2
F2
Switch
stationary
Vehicles
