Siemens SIMATIC NET Operating Instructions Manual page 19

Redundant network with SCALANCE XC100-4OBR
By using the SCALANCE XC100-4OBR, network availability can be increased particularly in
networks that are not easy to access, for example wind farm networks.
If the bypass relay is connected before a network component, the network component can
be bypassed by the bypass relay if a problem occurs (e.g. power outage) and
communication in the network remains established.
SCALANCE XC100-4OBR
Operating Instructions, 10/2013, C79000-G8976-C297-02
Description of the device
3.4 Areas of application
19