Hirschmann RS20 User Manual page 47

Ring/Network Coupling
Redundancy mode
 In the "Redundancy Mode" frame, select
– "Redundant Ring/Network Coupling" or
– "Extended Redundancy".
Figure 18: Two-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 fails
During the reconfiguration period, package duplications may occur.
Therefore, only select this setting if your application detects package
duplications.
Figure 19: Extended redundancy
UM Redundancy Configuration L2E
Release 7.1 12/2011
4.2 Preparing a Ring/Network
(see fig. 18)
(see fig.
Coupling
12).
47