Specifications

Description
3.2 Network topologies
SCALANCE X-400 BA
16 Operating Instructions, 03/2009, C79000-G8976-C186-07
3.2.3 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.
Functional description
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
SCALANCE X414-3E SCALANCE X408-2
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
configuration 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
words, it restores a functioning bus over this substitute path. Reconfiguration is achieved
within 0.3 s. As soon as the problem is eliminated, the original topology is restored; in other
words, the ring ports in the redundancy manager are disconnected from each other again.
In a ring with redundancy manager, there can only be one switch configured as a
redundancy manager.
(Default ports 5.1 and 5.2. Both the RM and the switches in the ring must be connected over
these ring ports to allow redundancy to function.)
Electrical ring ports
An electrical ring with redundancy manager can be set up without media modules since the
basic device provides connectors (RJ-45 jacks) that allow attachment of electrical (twisted
pair) connections (10, 100, 1000 Mbps). The factory setting defines the two ports on slot 5 as
ring ports.
Table 3- 6 Connectors of the basic device (on the slots)
SCALANCE X414-3E SCALANCE X408-2
5 5 and 6
Optical ring ports
An optical ring with redundancy manager is only possible with media modules.
Which slots or ports should be used, depends on the selected transmission rate. The ports
that can be used as ring ports are located on the media modules that can be used in the
following slots (see table).