Electrical Connection Overview - Sungrow SG25CX-P2 User Manual

5 Electrical Connection
table 5-1 The label of COM2 terminal
DI
DI DI
PGND PGND
table 5-2 The label description of COM2 terminal
No. Label
1 DI
2 DRM
3 DO
RS485 (A1, B1)
4
Meter (A2, B2)
5
(1) When the inverter is connected to a third-party monitoring device, please confirm which
communication interface is used, and whether it will cause loss of certain functions of the
inverter.
5.3

Electrical Connection Overview

Connecting the inverter to the PV system requires connecting the inverter to the protective
grounding point, to the grid, and to the PV strings.
（A）PV string
（D）Grid
36
DRM
C D4/8 D2/6
R D3/7 D1/5
Description
emergency stop dry contact
• "AU"/"NZ": Demand response enabling device
(DRED)
• "DE": Ripple Control Receiver (RCR)
fault output dry contact
• Connect to the Logger, so as to implement data ex-
change with PC or other monitoring devices.
(1)
• Enable the communication between inverters in
parallel.
(1) Connect to the Smart Energy Meter.
（B）Optimizer(optional)
（E）Monitoring device
DO RS485
COM B1 B1
NO A1 A1
（C）Inverter
（F）AC circuit breaker
User Manual
Meter
B2
A2