Specifications

Description
3.2 Network topologies
SCALANCE X-400 BA
12 Operating Instructions, 03/2009, C79000-G8976-C186-07
● Linear structure
● Star/tree structure
● Ring with redundancy manager
The maximum cable length is 70 km for single mode Fast Ethernet transmission and single
mode gigabit transmission. Mixed operation within the topology, for example between
SCALANCE X414-3E and OSMs/ESMs is possible regardless of the structure being used
(ring with redundancy manager, star, or linear structure).
Using an IE Switch X-400 as the redundancy manager in a ring with redundancy manager
provides greater availability. If there is an interruption on the connection between these
switches, the IE Switch X-400 used as redundancy manager acts like a switch and in a very
short time creates a line from the ring with redundancy manager. As a result, a functional,
end-to-end structure is restored. For more detailed information, refer to the configuration
manual "SCALANCE X-300 and SCALANCE X-400 Industrial Ethernet Switches".
3.2 Network topologies
3.2.1 Linear structure
Functional description
Linear structures can be created with IE Switches X-400. The cascading depth and total
span of a network are limited only by the signal propagation times of the communication
connections.
Properties of the linear structure
Each IE Switch X-400 communicates over a TP or FO cable with a neighboring Ethernet
switch. Communication is possible over the optical or the electrical ports.
For more detailed information, refer to the table below.
Table 3- 1 Optical ports (on the slots)
Media module SCALANCE X414-3E SCALANCE X408-2
Gigabit
MM492-2, MM492-2LD,
MM492-2LH,
MM492-2LH+ or
MM492-2ELH
5 5 and 6
Fast Ethernet
MM491-2, MM491-2LD or
MM491-2LH+
6 and 7
with extender: 12, 13, 14 and 15
5 and 6