11
Quick installation guide for RPI M15A M20A inverters
O N
O FF
AC O UTPUT
RS485
DC SWITCH
DC INPUT
DC1
DC2
O FF
O N
Connecting to a datalogger via RS485 (optional)
9
Pin
Designation
1
VCC (+12 V)
2
GND
3
DATA+
4
DATA–
5
DATA+
6
DATA–
RS485
Data format
Baud rate
9600, 19200, 38400
Data bits
8
Stop bit
1
Parity
N/A
The RS485 connector is used to connect the inverters of the PV
plant to a monitoring system
If you want to use SOLIVIA Monitor, the Internet based monitor-
ing from Delta, you will also need a SOLIVIA M1 G2 Gateway.
Default baud rate is 19200 which can be changed on the inverter
(see
“Setting the baud rate for RS485”, p. 16
).
Communication port
Connecting multiple inverters to a datalogger
AC O UTPUT
RS485
DC SWITCH
DC INPUT
DC1
DC2
O FF
O N
AC O UTPUT
RS485
DC SWITCH
DC INPUT
DC1
DC2
O FF
O N
AC O UTPUT
RS485
DC SWITCH
DC INPUT
DC1
DC2
O FF
O N
...
O N
O FF
O N
O FF
O N
O FF
Termination resistor = ON
RS485
Termination resistor = OFF
Termination resistor = OFF
Connecting a single inverter to a datalogger
Datalogger
Termination resistor = ON
► If you connect multiple inverters via RS485, set a dif-
ferent inverter ID for each inverter (see
“Setting the
inverter ID”, p 17
).
If your datalogger has no integrated termination
resistor, switch on the termination resistor on the
fi rst inverter in the RS485 line.
Datalogger
6 5 4 3 2 1
EPO (Emergency Power Off)
Dry contact
Switch for
RS485 termination resistor
Interface for RS485 and VCC
