Sungrow SG30CX, User Manual

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Item Terminal Mark Note
A PV terminals + / -
MC4 PV connector
SG30CX, SG30CX-NI, SG33CX: 6 pairs of
terminals
SG40CX: 8 pairs of terminals
SG50CX, SG50CX-NI: 10 pairs of terminals
B
Communica-
tion terminal
COM1
For RS485 communication wiring.
COM2 For Communication module connection.
COM3
For digital input and output DI/DO wiring.
COM4
For DRM communication wiring.
C
AC junction
box
—
Remove the protective case and use the junc-
tion box in the shipping accessory for wiring.
E
External pro-
tective
grounding
terminal
use at least one of them to ground the inverter.
5.3 Electrical Connection Overview
The electrical connection should be realized as follows:
Item
Designation
A
PV string
B Inverter
C Grid
D
Monitoring device
E AC circuit breaker
5 Electrical Connection User Manual