Sungrow SG33CX, Руководство пользователя

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User Manual 5 Electrical Connection
45
Inverter
Logger
OUT
PC
ON OFF
120ohm
SW1
A1 A1 B1 B1
RS485
Multi-inverter communication system
In case of multiple inverters, all the inverters can be connected via RS485
cables in the daisy chain manner.
Inverter 1 Inverter 2~(N-1) Inverter N
Monitoring station
Logger
Terminal Block
RJ45
RJ45
RJ45
OUT
IN
OUT
IN
OUT
A1 A1 B1 B1
OUT
IN
A1 A1 B1 B1
OUT
IN
A1 A1 B1 B1
OUT
OUT
IN
OUT
IN
OUT
Terminal Block Terminal Block
When more than 15 inverters are connected on the same daisy chain, the
inverters on two ends of the chain should be equipped with terminal resistors of
120Ω
to ensure communication quality by configuring the dip switch (SW1), and