Hirschmann RS20 User Manual page 39

Ring/Network Coupling
Figure 11: One-Switch coupling: Selecting the redundancy mode
With the "Redundant Ring/Network Coupling" setting, either the
main line or the redundant line is active. The lines are never both active
at the same time.
With the "Extended Redundancy" setting, the main line and the
redundant line are simultaneously active if the connection line between
the devices in the connected (i.e., remote) network becomes inoperable
(see fig. 12). During the reconfiguration period, packet duplications may
occur. Therefore, select this setting only if your application detects
package duplications.
Figure 12: Extended redundancy
Coupling mode
The coupling mode indicates the type of the connected network.
 In the "Coupling Mode" frame, select
– "Ring Coupling" or
– "Network Coupling"
UM Redundancy Configuration L2E
Release 7.1 12/2011
4.2 Preparing a Ring/Network
(see fig. 13)
Coupling
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