SIEMENS
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Siemens IK PI · 2015
PROFINET/Industrial Ethernet
Industrial Ethernet Switches
SCALANCE XR-300 managed
2
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Function
•
Integrated redundancy manager for constructing Fast
Ethernet and Gigabit Ethernet ring topologies with high-speed
media redundancy. Reliable communication is achieved by
closing an optical or electrical line with SCALANCE X-400,
X-300 or X-200 switches to form a ring. The redundancy
manager (RM) integrated in the SCALANCE XR-300 switch
monitors the function of the network. It recognizes the failure
of a transmission link or of SCALANCE X switch in the ring
and activates the substitute path within a maximum of
0.2 seconds.
•
Redundant interfacing to company networks;
SCALANCE XR-300 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. video trans-
mission) are used;
through learning the multicast sources and targets (IGMP
Snooping, IGMP Querier), SCALANCE XR-300 switches can
also filter multicast data traffic and therefore limit the load in
the network. Multicast and broadcast traffic can be limited.
•
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 several
devices.
•
Fast replacement of devices in event of failure, by means of
the C-PLUG switching medium
•
Link aggregation (IEEE 802.1q) for bundling data streams
•
Quality of Service (IEEE 802.1p) for prioritization of network
traffic
Network topology and network configuration
The network topology can easily be adapted to the structure of
the plant using SCALANCE XR-300 Industrial Ethernet switches.
The following network structures and combinations of structures
can be implemented:
•
Fast Ethernet with fast media redundancy;
to increase network availability, as many as 50 X-200, X-300,
X-400 or X-500 switches cascaded in line can be connected
into a ring.
•
Several rings can be redundantly linked through the standby
function
•
In addition, SCALANCE XR-300 supports redundant
connection of the ring structure to the corporate network with
a rapid spanning tree.
•
Star topology with SCALANCE XR-300 switches:
Each SCALANCE XR-300 switch represents a neutral point
that can connect up to 24 nodes or subnets with each other
electrically.
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 km at 100 Mbit/s
- 750 m at 1 Gbit/s
•
Maximum line length between two modules for single-mode
fiber-optic conductors:
- 26 km to 70 km at 100 Mbps
- 10 to 120 km at 1 Gbit/s
•
Maximum cable length of the TP cable between two
SCALANCE X switches:
- Max. 100 m with IE FC cable 2x2 and IE FC RJ45 Plug 180
- Max. 100 m at 1 Gbit/s with IE FC Standard Cable 4x2
(90 m), IE FC RJ45 Modular Outlet and patch cable (10 m)
- Max. 10 m using patches with TP cord
© Siemens AG 2014