Siemens SCALANCE X-300 Series Operating Instructions Manual page 25

The redundancy manager function is enabled by the SELECT/SET button or by a setting in the
software. For more detailed information, refer to the configuration manual "SCALANCE X‑300
and SCALANCE X-400 Industrial Ethernet Switches".
In contrast to the ring ports of the redundancy clients, the ring ports of the redundancy manager
are disconnected when the network is operating problem-free. The IE Switch X-300 operating
in the role of 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 media redundancy, only one device can operate as the redundancy manager.
Ring ports
An electrical ring with redundancy manager can be set up via the RJ-45 connectors that allow
attachment of electrical (twisted pair) connections (10, 100 and/or 1000 Mbps). The
SCALANCE X310FE is an exception to this. This device only allows attachment of electrical
(twisted-pair) connections at 10 or 100 Mbps.
The use of the IE Switch X-300 in an optical ring (1000 Mbps, with SCALANCE X-300EEC
100Mbps) with a redundancy manager is also possible with the exception of the devices
SCALANCE X310 and SCALANCE X310FE.
You can configure which ports take on the function of ring ports individually. The following table
shows the factory defaults for the ring ports.
Device
X-304-2FE
X306-1LD FE
X307-3
X307-3LD
X308-2
X308-2LD
X308-2LH
X308-2LH+
X310
X310FE
X320-1FE
X320-3LD FE
X308-2M
X308-2M TS
X308-2M PoE
X302-7 EEC
X307-2 EEC
XR324-12M
XR324-12M TS
SCALANCE X-300
Operating Instructions, 11/2019, A5E01113043-24
Factory setting for the ring ports
Electrical
Port 2 and port 3
Port 9 and port 10
Port 9 and port 10
Port 1 and port 2
Port 1 and port 2
Port 1 and port 2
Port 1 and port 2
Port 1 and port 2
Port 8 and port 9
Port 8 and port 9
Port 1.1 and port 1.2
Port 1.1 and port 1.2
Network topologies
3.4 Ring with redundancy manager
Optical
Port 1 and port 2
Port 9 and port 10
Port 9 and port 10
Port 9 and port 10
Port 9 and port 10
Port 9 and port 10
Port 9 and port 10
(no optical ports)
(no optical ports)
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