Description
3.2 Network topologies
SCALANCE X-400
Operating Instructions, 06/2015, C79000-G8976-C186-12
19
Figure 3-3 Star structure (optical)
Ring with redundancy manager
To increase the availability, optical or electrical linear topologies of up to 50 switches
(IE Switches X-400, SCALANCE X-200, or OSM/ESM) can be closed with a SCALANCE
X414-3E or SCALANCE X408-2 to form a ring.
The two ends of the bus are closed to form a ring by an IE Switch X-400 operating as a
redundancy manager.
Table 3- 5 Redundancy manager setting
The redundancy manager function is enabled or
disabled by DIL switches on the CPU module or
by configuring with CLI or WBM.
The redundancy manager function is enabled by
the SELECT/SET button or implemented by a
setting in the software (CLI or WBM).
For more detailed information, refer to the config-
uration manual "Industrial Ethernet Switches
SCALANCE X-300 SCALANCE X-400".
In contrast to the ring ports of the other switches, the ring ports of the redundancy manager
are disconnected when the network is operating problem-free. The IE Switch X-400
operating in the redundancy manager mode monitors the connected bus over its ring ports
and switches the ring ports through if there is an interruption on the connected bus; in other
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