12
Quick installation guide for RPI H3 inverters
Connecting to a datalogger via RS485
10
If you need to wire dry contacts, digital inputs
or RS485, it is recommended to do this in a dry
environment and before you hang the inverter
onto the wall.
Reasons for this are:
Ź
You will have to remove the covers from the
connection ports. Water could leak into the
inverter.
Ź
The terminal blocks inside are not easily
accessible.
RS485 port
2
1
Connectors on the RS485 card
Pos.
Designation
1
RS485 terminal block
2
Switch for RS485 termination resistor
RS485 is used to connect the inverters of the PV plant via a data-
logger to a monitoring system.
VCC can be used for an external relais.
For connecting RS485, Pins 3 to 6 are used.
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 chapter
“Setting the baud rate”, p. 15
).
Pin assignment
2
1
4
3
6
5
RS485 pin assignment
Pin
Designation
1
VCC
2
GND
3
DATA+ (RS485)
4
DATA– (RS485)
5
DATA+ (RS485)
6
DATA– (RS485)
Data format
Baud rate
9600, 19200, 38400;
Standard: 19200
Data bits
8
Stop bit
1
Parity
not applicable
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