• Via an external redundancy box (RedBox) or a switch capable of connecting to
PRP and normal networks
• By connecting the node directly to LAN A or LAN B as SAN
• By connecting the node to the protection relay's interlink port
HSR
HSR applies the PRP principle of parallel operation to a single ring, treating the two
directions as two virtual LANs. For each frame sent, a node, DAN, sends two frames,
one over each port. Both frames circulate in opposite directions over the ring and each
node forwards the frames it receives, from one port to the other. When the originating
node receives a frame sent to itself, it discards that to avoid loops; therefore, no ring
protocol is needed. Individually attached nodes, SANs, such as laptops and printers,
must be attached through a “redundancy box” that acts as a ring element. For example,
a 615 or 620 series protection relay with HSR support can be used as a redundancy
box.
GUID-207430A7-3AEC-42B2-BC4D-3083B3225990 V1 EN
Figure 8: HSR solution
2.7.3 Process bus
Process bus IEC 61850-9-2 defines the transmission of Sampled Measured Values
within the substation automation system. International Users Group created a
guideline IEC 61850-9-2 LE that defines an application profile of IEC 61850-9-2 to
facilitate implementation and enable interoperability. Process bus is used for
distributing process data from the primary circuit to all process bus compatible IEDs
in the local network in a real-time manner. The data can then be processed by any IED
to perform different protection, automation and control functions.
Section 2 1MRS756378 S
REF615 overview
34 REF615
Application Manual
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