Huawei SUN2000L-2KTL Quick Manual page 22

5. (Optional) Install signal cables.
Ensure that the protective layer of the cable is inside the
connector, cut off excess core wires from the protection layer,
totally insert the exposed core wire into the cable hole, and
securely connect the cable.
COM Port Pin Definitions of SUN2000–(2KTL–5KTL)-L0
No. Label Definition
1 485B1 RS485B, RS485 differential signal–
2 485A1 RS485A, RS485 differential signal+
3 485B2 RS485B, RS485 differential signal–
4 485A2 RS485A, RS485 differential signal+
5 12V– Negative electrode of the 12 V power supply port
6 12V+ Positive electrode of the 12 V power supply port
7 - -
8 PE Ground
COM Port Pin Definitions of SUN2000–(2KTL–6KTL)-L1
No. Label Definition
1 - -
2 - -
3 485B2 RS485B, RS485
differential signal–
4 485A2 RS485A, RS485
differential signal+
5 GND 12 V–
6 EN+ 12V+
7 - -
8 - -
Pull the DC input power cables back to
ensure that they are connected securely.
Extension cables for DC terminals
Description
-
-
Connects to the RS485– signal port of batteries, smart power
sensors, and smart PV safety boxes. When smart power sensors
and smart PV safety boxes coexist, they share the 485B2– ports.
Connects to the RS485+ signal port of batteries, smart power
sensors, and smart PV safety boxes. When smart power sensors
and smart PV safety boxes coexist, they share the 485A2+ ports.
Connects to the 12 V negative electrode of smart PV safety
boxes.
Connects to the 12 V positive electrode of smart PV safety
boxes.
-
-
21
Click
Description
Connects to the RS485 signal
port of the smart power sensors.
Connects to the RS485 signal
port of smart PV safety boxes.
-
Connects to the shielding layer
of cables.