ABB PVS-60-TL-US Product Manual page 44

In order to improve the communication services and allow reaching of
all the inverters in the chain also in presence of fault it is recommended
to create a ring shape layout by connecting both the first and the last in-
verters of the chain to the local Ethernet switch (as shown in the picture)
Please refer to chapter 5 for further information about the installation.
Ethernet connection - Ring configuration
Ethernet connection - Daisy chain configuration
Ethernet connection - Star configuration
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3 - Characteristics
Customer router
Customer router
Customer router