Sungrow SG33CX User Manual page 55

User Manual
Multi-inverter communication system
In case of multiple inverters, all the inverters can be connected via RS485
cables in the daisy chain manner.
RJ45
Terminal Block
A1 A1 B1 B1
Inverter 1
OUT
IN
Logger
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
Inverter
RJ45
IN
OUT
Terminal Block
IN
OUT
Inverter 2~(N-1)
OUT
IN
Monitoring station
RS485
120ohm
A1 A1 B1 B1
ON OFF
OUT
Logger
IN
OUT
A1 A1 B1 B1
IN
OUT
Inverter N
5 Electrical Connection
SW1
PC
RJ45
OUT
Terminal Block
A1 A1 B1 B1
OUT
OUT
45