18
Installation guide for solar inverters RPI M6A M8A M10A EU V5 EN 2022-08-15
The inverter can be connected to a data logger via RS485,
e.g. for monitoring the PV system or changing the inverter
settings.
Multiple inverters can be connected in series to a data log-
ger.
Observe the following instructions for ensuring a stable
data connection.
Connecting a single inverter to a data logger
► Switch on the RS485 termination resistor.
Connecting multiple inverters to a data logger
► Switch on the RS485 termination resistor at the last
inverter in the chain.
► If the data logger does not have an integrated RS485
termination resistor then also switch on the RS485
termination resistor at the rst inverter in the chain.
► Switch o the RS485 termination resistor at all other
inverters in the chain.
► Set a dierent ID at each inverter so that the data log-
ger can identify the individual inverters.
► Set the same RS485 Baud rate at all inverters.
Cable and wiring requirements
● Shielded twisted-pair cable with solid conductors.
● Cable diameter: 5 mm
● Wire cross-section: 0.25 ... 1.5 mm
2
► Lay the cable with a suitable clearance to the AC and
DC cables to prevent interference in the data connec-
tion.
Components of the RS485 card
1
2
1 RS485 (terminal block)
2 DIP switch for the RS485 termination resistor
DIP switch for the RS485 termination resistor
Terminal assignment of the RS485 terminal block
56 34 12
1 VCC (+12 V; 0.5 A)
2 GND
3 DATA+ (RS485)
4 DATA– (RS485)
5 DATA+ (RS485)
6 DATA– (RS485)
Terminal pairs 3/4 or 5/6 can be used. The second terminal
pair is only required when connecting several inverters via
RS485.
Data format
Baud rate 9600, 19200, 38400; Standard: 19200
Data bits 8
Stop bit 1
Parity Not applicable
The Baud rate can be set on the inverter display after com-
missioning, see
”Baud rate for RS485”, page 23.
Connecting a data logger using RS485
To Next Page
Loading...
Need help?
General
