Installation | Interface Port RS485
30 | Doc. No. 982055, Version 01, SelectSun 20K
Fig. 14: Remove cable
4.14 Interface Port RS485
The RS485 interface supports the USS (Universal Serial Interface Protocol) and Modbus/Sunspec protocols,
which can be used for transmission of data, for example, to a data logger of a remote monitoring system.
Portal
Data Logger /
Park Control
Ethernet
RS485+ RS485- Ref.
4
4
3
3
2 2
4
4
3
3
2
4
Bus
termination
1
3 2
2
4
3
2
Inverter
1
Inverter 2
Inverter n
Fig. 15: Standard interface
When using this interface, please note that each device using the bus requires a unique address.
The bus termination is made by means of wire jumpers on RS485 OUT to the last bus user (inverter “n”).
Pin
Signal
Pin 1
(only used for termination)
Pin 2
RS485 +
Pin 3
RS485 -
Pin 4
Reference