Huawei SUN2000-75KTL-M1 - Connecting RS485 Communications Cables

16
Connecting RS485 Communications Cables (4–8 mm Four-hole Rubber Plug)
Number of
communications cables
Port
Pin
Definition
Pin
Definition
Description
RS485
-1
1
RS485A IN, RS485
differential signal+
2
RS485A OUT, RS485
differential signal+
Used for cascading
solar inverters or
connecting to devices
such as the
SmartLogger
.
3
RS485B IN, RS485
differential signal
–
4
RS485B OUT, RS485
differential signal
–
Protection
ground
5
PE, shielding ground
6
PE, shielding ground
–
RS485
-2
7
RS485A, RS485
differential signal+
8
RS485B, RS485
differential signal
–
Used for connecting to
RS485 slave devices.