ABB RELION 615 Series Product Manual page 19

Motor Protection and Control
REM615
Product version: 5.0 FP1
relays. If more than 30 relays are to be connected, it is
recommended to split the network into several rings to
guarantee the performance for real-time applications.
COM600
Redundancy
Box
REF615
GUID-7996332D-7FC8-49F3-A4FE-FB4ABB730405 V1 EN
Figure 10. 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
ABB
SCADA
Redundancy
Box
IEC 61850 HSR
RET620
REF620
Ethernet switch
Redundancy
Box
REM620 REF615
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.
1MRS756890 N
Devices not supporting HSR
19