Huawei SUN2000-20KTL-M3 Quick Manual page 10

No. Definition Function
RS485
1 485A1-1 differential
signal +
RS485
3 485B1-1 differential
signal –
Ground point
5 PE on the shield
layer
RS485
7 485A2 differential
signal +
RS485
9 485B2 differential
signal –
11 – –
13 GND GND
15 DIN5 Reserved
Scenarios Where No Signal Cable Is Connected
If no signal cable is required for the SUN2000, use waterproof plugs to block the wiring holes on
the signal cable connector and connect the signal cable connector to the communications port
on the SUN2000 to improve the waterproof performance of the SUN2000.
Description No. Definition Function
2
Used to cascade
inverters or
connect to the
SmartLogger.
4
– 6
Reserved.
Connects to the 8
RS485 signal
port on the
power grid
10
scheduling
power meter.
– 12
– 14
– 16
9
RS485
485A1-2 differential
signal +
RS485
485B1-2 differential
signal –
Ground point
PE on the shield
layer
DIN1
DIN2
Reserved
DIN3
DIN4
GND
Description
Used to
cascade
inverters or
connect to the
SmartLogger.
–
–