SIEMENS
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Siemens IK PI · 2015
PROFINET/Industrial Ethernet
Industrial Ethernet Switches
SCALANCE X-300EEC managed
2
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Function
•
Integrated redundancy manager for constructing ring topol-
ogies with fast media redundancy Rings consisting of
SCALANCE X-300 and X-400 switches can be operated at 1
000 Mbit/s. In rings with SCALANCE X-200 or OSM/ESM it is
possible to integrate SCALANCE X-300EEC switches at
100 Mbit/s.
•
Redundant interfacing to corporate networks;
SCALANCE X-300EEC switches support the standardized
redundancy procedures Spanning Tree Protocol (STP) and
Rapid Spanning Tree Protocol (RSTP). This enables a
subnetwork to be connected redundantly to a higher level
corporate network with reduced requirements for the reconfig-
uration time (in the order of seconds). By supporting the
Multiple Spanning Tree Protocol (MSTP), a network can also
be split into multiple sub-segments.
•
Support of virtual networks (VLAN);
for structuring Industrial Ethernet networks with a fast growing
number of users, a physically existing network can be divided
into several virtual networks.
•
Load limiting when multicast protocols (e.g. Querier, video
transmission) are used;
through learning the multicast sources and targets (IGMP
Snooping, IGMP Querier), SCALANCE X-300EEC switches
can also filter multicast data traffic and therefore limit the load
in the network.
•
Time synchronization;
diagnostic messages (log table entries, e-mails) are time-
stamped. The local time is standardized throughout the
network by means of synchronization with a SICLOCK time
transmitter, SNTP or NTP server or via IEEE1588, thereby
simplifying the assignment of diagnostic messages of multiple
devices.
•
Fast replacement of devices in event of failure, by means of
the C-PLUG switching medium
Network topology and network configuration
The SCALANCE X-300EEC Industrial Ethernet switches with
degree of protection IP30 can be adapted to the structure of the
plant in star, line and ring topologies.
The following network structures and combinations of structures
can be implemented:
•
Fast Ethernet rings with fast media redundancy;
to increase network availability, as many as 50 X-200, X-300,
or X-400 switches cascaded in line can be connected into a
ring with a total length of up to 150 km. On the failure of a
transmission link or of a SCALANCE X switch in the ring, the
transmission path is reconfigured within 0.3 seconds
(0.2 seconds for MRP).
•
Several rings can be redundantly linked through the standby
function
•
Construction of interconnected network structures by means
of rapid spanning tree protocol (RSTP)
•
At the same time, SCALANCE X-300EEC supports redundant
connection of the ring structure to the corporate network with
a rapid spanning tree.
•
Star topology with SCALANCE X-300EEC switches:
The SCALANCE X-300EEC switch represents a neutral point
that can connect up to nine nodes or subnets with each other.
When configuring the network, it is necessary to observe the
following boundary conditions:
•
Maximum line length between two modules for multi-mode
fiber-optic conductors:
- 5 000 m at 100 Mbit/s
•
Maximum cable length of the TP cable between two
SCALANCE X switches:
- max. 100 m
© Siemens AG 2014