RS485A
RS485B
RS485A
RS485B
2. Connection between inverters:
Daisy chain method, inverter RS485A/RS485B are connected to the RS485A/
RS485B of the next inverter respectively. the number of devices connected by a
daisy chain is less than 20.
Cable type One end of cable Other end of cable
Device Port Port Device
Shielded twis-
ted pair
CH1000
RS485A COM-1
Inverter 1
RS485B COM-3
Inverter 1
COM-2 COM-1
Inverter 2
COM-4 COM-3
Inverter 2
COM-2 COM-1
Inverter 3
COM-4 COM-3
3. Connect RS485 termination matching resistor:
When the number of inverter connections exceeds 15 or the communication
distance exceeds 1000 meters, it is recommended to connect a 120Ω
termination matching resistor between RS485 interfaces A and B of CH1000
and the inverter at the very end of the daisy chain, as shown in the following
figure. The specific situation is subject to the actual situation on site.
24/92 SOFAR CH1000
Cable Connections
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