Siemens SCALANCE X-200 Operating Instructions Manual page 4

Preface
The only difference between the SCALANCE XF204IRT and the SCALANCE X-204IRT is
the shape.
SCALANCE X-200 IRT PRO managed
In terms of functionality, the SCALANCE X200 IRT PRO switches are the same as the
SCALANCE X-200 IRT managed switches listed above. The switch with degree of protection
IP65/IP67 is designed for use outside a cabinet and has PROFINET-compliant connector
technology (RJ-45 in compliance with IEC 61076-3-117 for X204 IRT PRO or SC RJ in
compliance with IEC 61754-24-2 for X202-2P IRT PRO).
SCALANCE X-300
The main areas of application are high-speed plant networks with an interface to the
Enterprise network. The SCALANCE X-300 managed plus product line combines the
firmware functionality of the SCALANCE X-400 product line (without routing functions at the
layer 3 level) with the compact design of the SCALANCE X-200 product line. The "managed
plus" attribute means both enhanced management functions compared with the SCALANCE
X-200 and enhanced firmware functionality.
SCALANCE X-400 modular
The switches of the SCALANCE X-400 product series are suitable for the construction of
optical/electrical linear, ring and star topologies (10/100/1000 Mbps) for high-speed systems.
They have a modular structure, in which media modules and extender modules can be
inserted in the switch as required. These expansions make as many as eight electrical and
eight optical ports additionally available.
By supporting IT standards, for example, VLAN, RSTP, Layer 3, automation networks can be
seamlessly connected to existing corporate networks.
The SCALANCE X-400 switches are ideally suited, for example, for process control systems
such as PCS 7.
What is possible?
The devices of the SCALANCE X-200 product lines allow the cost-effective installation of
Industrial Ethernet linear (bus), star and ring structures with switching functionality.
By using the "cut through" switching mechanism, the SCALANCE X-200IRT switches are
ideal to meet the real-time requirements of PROFINET.
Cut through is not possible
● between a port set to 10 Mbps and a port set to 100 Mbps
● when two packets are to be sent at the same time on one port.
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Operating Instructions, 12/2011, A5E00349864-19
SCALANCE X-200