Huawei SUN2000-200KTL-H2 Quick Manual page 20

Port Pin
Definition
RS485A IN, RS485
1
differential signal+
RS485-1
RS485B, RS485
3
differential signal–
PE 5 PE, shielding ground 6
RS485A, RS485
RS485-2 7
differential signal+
Connecting Communications Cables (4–8 mm Four-Hole Rubber Plug)
When using the four-hole rubber plug, block the unused cable hole with a plug, and then
tighten the locking cap.
Pin
Definition
RS485A OUT, RS485
2
differential signal+
RS485B, RS485
4
differential signal–
PE, shielding ground
RS485B, RS485
8
differential signal–
19
Description
Used for cascading
inverters or connecting to
devices such as the
SmartLogger.
-
Used for connecting to
RS485 slave devices.