Sungrow SG3.0RT Quick Installation Manual page 44

COM2
Label
RSD (RSD-1, RSD-2)
NS (NS-1, NS-2)
DRM (D1/5, D2/6, D3/7, D4/8, R, C)
RS485-1 (A1, B1)
DO (NO, COM)
RS485-3 (B3, A3)
Meter (B2, A2)
The connections for Meter (single inverter), DO, NS and DRM are the same. Take meter connection as an

example.
1
4
ø5.3...7 mm
0.5...1.0 mm
C
A: 40...50 mm
B: 7...10 mm for single-strand wire
C: for single-strand wire
ø < 2.8 mm
2
2
B
A
B = E + (2~3) mm
For multi-core multi-strand wire
NS
RSD
RSD-1 RSD-2 NS-1 NS-2
B3 A3
B2 A2
RS485-3 Meter
Description
For inverter emergency stop
For inverter emergency stop
For external Demand Response Enabling Device ("AU"/"NZ")
For Ripple Control
For inverter daisy chain
(Cannot be used simultaneously with COM1 port for WiNet-S/WiNet-S2)
External alarm interface, e.g. light indicator and/or buzzer
The external DC voltage should not be higher than 30 V and the current
not higher than 1 A.
Reserved
Smart energy meter interface
E
43
RS485-1
DRM
D1/5 D3/7 R A1
D2/6 D4/8 C B1
IT
3
5
For multi-core multi-strand wire
DO
NO
COM