Communication Connections - Goodwe GW250K-HT User Manual

4.4.4 External Ground Terminal Connection
According to EN50178, a PE connector has been added. Customers have to connect this connector
to the PE cable when installing the inverter. Please complete the connection following the steps
below.
Step 1: Strip the selected cable to an appropriate length. (M8 ground terminals
prepared by customers)
L1
B
Step 2: Insert the stripped cable into the terminal, and then crimp it with pliers.
Crimp
Step 3:
Apply silica gel on the ground terminal to improve its corrosion resistance after the
grounding cable is installed.
17
A
No. Name Description
A Ground terminal M8
B Yellow-green cable
C
C Cross-sectional area
D Cable length L1+(1-2 mm)
D
Use a heat gun to tighten the heat shrink tube

4.5 Communication Connections

4.5.1 RS485 communication
Apply to RS485 models only.
Connect the RS485 port of the inverter to the Data Logger. The total length of the connection cable is less than
1000m.
Keep the communication cable away from power cables to prevent the communication from being interrupt-
ed.
The RS485 wiring method is shown below.
Inverter 20 Inverter 2
.....
RS485 RS485
.....
RS485 RS485
.....
RS485 RS485
If more than 2 inverters are connected and also connected to the data logger, at most 20 inverters
are allowed on the daisy chain.
RS485 communication connect procedure:
Step 1: Disassemble the communication terminal(in the accessory pack).
Inverter 1 SCB3000
Internet
SCB3000
Solar Communication Box
Router
RS485 LAN
RS485
RS485
Waterproof rubber ring
Nut
PC
18