Sungrow SG33CX - Electrical Connection Overview

User Manual 5 Electrical Connection
29
A B C
D
A
(SG40CX)
A
(SG50CX)
B
COM1
COM3
COM2
COM4
A
(SG33CX)
Fig. 5-1 Wiring terminals
* Figure shown here is for reference only. The actual product you receive may
differ
Item
Terminal
Mark
Note
A
PV terminals
+ / -
MC4 PV connector
SG33CX: 6 pairs of terminals
SG40CX: 8 pairs of terminals
SG50CX: 10 pairs of terminals
B
Communication
terminal
COM1
/3/4
For RS485 communication, digital input
and output DI/DO and DRM
communication wiring.
COM2
Communication module connection,
such as GPRS, WiFi, and E-Net
C
AC junction box
-
Remove the protective case and use the
junction box in the shipping accessory for
wiring.
D
Additional
grounding terminal
2, use at least one of them to ground the
inverter
5.3 Electrical Connection Overview
Electrical connection in the PV system includes additional grounding
connection, AC connection, and PV string connection.