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Figure 13. High availability seamless redundancy (HSR) solution
The choice between the HSR and PRP redundancy protocols
depends on the required functionality, cost and complexity.
The self-healing Ethernet ring solution enables a cost-efficient
communication ring controlled by a managed switch with
standard Rapid Spanning Tree Protocol (RSTP) support. The
managed switch controls the consistency of the loop, routes
the data and corrects the data flow in case of a communication
switch-over. The relays in the ring topology act as unmanaged
switches forwarding unrelated data traffic. The Ethernet ring
solution supports the connection of up to 30 615 series relays.
If more than 30 relays are to be connected, it is recommended
to split the network into several rings. The self-healing Ethernet
ring solution avoids single point of failure concerns and
improves the reliability of the communication.
The self-healing Ethernet ring solution avoids single point of
failure concerns and improves the reliability of the
communication. The solution can be applied for the Ethernet-
based IEC 61850, Modbus and DNP3 protocols.
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