45
Installation and Operation Manual for RPI M50A
6 Installation
6.7 Connecting communication port I
(optional)
DC 2
COMM.
+
–
Fig. 6.24: Position of the communication port I on the
inverter
Fig. 6.25: Connectors on the communication card
Pin
Designation
1
Dry contacts
2
VCC switch and RS485 termination resis-
tor
3
DC connectors (DC inputs)
4
Communication port 1
6.7.1 RS485 and VCC
RS485 is used to connect the inverters of the PV
plant via a datalogger to a monitoring system.
VCC can be used for an external relais. To use VCC,
set
DIP switch 1
to
ON
. When you do not use VCC,
always set
DIP switch 1
to
OFF
.
For connecting RS485, Pins 3 to 6 are used.
If you want to use SOLIVIA Monitor, the Internet
based monitoring 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
“8.5 Baud rate for RS485”,
p. 57
).
Pin assignment
1 2 3 4 5 6
Pin
Designation
1
VCC (+12 V; 0.5 A)
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
