Sungrow SG33CX User Manual page 62

5 Electrical Connection
Inverter 1
DI DI PGND PGND
Controlled
switch
RS485 daisy chain in the master-slave mode
Inverter 1
Controlled
switch
Logger
Ethernet port
RS485 terminal
PC
Network port
The inverter directly connected to the Logger is set to be the master
inverter by default, and it sends stop instruction to other inverters via
RS485 communication.
52
passive switch
Fig. 5-7 Local stop contact
Inverter 2
DI DI PGND PGND
Fig. 5-8 Daisy chain topology
Inverter 2
DI DI PGND PGND
A1 A1 B1 B1
IN
OUT
Fig. 5-9 Master-salve mode
Inverter interior
DI DI PGND PGND
...
...
DI DI PGND PGND
A1 A1 B1 B1
IN
OUT
User Manual
Inverter N
DI DI PGND PGND
Inverter N
DI DI PGND PGND
A1 A1 B1 B1
OUT