Hirschmann RS20 User Manual page 64

Ring/Network Coupling
Figure 22: Choosing the ring coupling configuration (when the DIP switch is off,
or for devices without a DIP switch)
For devices without DIP switches, the software settings are not
restricted.
For devices with DIP switches, depending on the DIP switch position,
the dialog displays the possible configurations in color, while those
configurations that are not possible appear in gray.
The possible configurations are:
 DIP switch RM: ON or OFF, STAND-BY: OFF:
Two-Switch coupling as master (with or without control line)

DIP switch RM: OFF, STAND-BY: ON:
One-Switch coupling and two-Switch coupling as slave (with or
without control line)

DIP switch RM: ON, STAND-BY: ON:
DIP switches are deactivated, and the software settings are possible
without any restrictions
If the DIP switches are activated and you want to use the software to
select one of the configurations that are not possible (grayed-out), you
put the DIP switches on the device into another position and reload the
dialog.
Note: For reasons of redundancy reliability, do not use Rapid Spanning Tree
and Ring/Network Coupling in combination.
64
5.2 Preparing a Ring/Network
UM RedundConfig L2P
Release 8.0 05/2013
Coupling