Sunny Island 4500
Installation & Operating Instructions
BWRI45-13-EE0304
- 74 -
SMA Regelsysteme GmbH
3.8 Communication in a Three-Phase Island Grid
The following figure shows which interconnecting cables can be installed for commu-
nication in a three-phase island grid to ensure convenient and troublefree operation.
Normally the connection between COM3 and a PC will be of temporary nature. As
COM3 is a RS232-style port, only one Sunny Island can be connected at a time.
Slave 1
Slave 2
Sunny Island
Master
PC
Sunny Boy
Control
COM1
COM1
COM2
COM3
COM2
COM3
COM1
COM2
COM3
COM1
COM2
S-BUS
Communication Interface
RS485 1200 Baud Sunny Net
Service Interface
RS232
PC Interface
RS485 19200 Baud SMA Net
Sunny Boy
Sunny Boy
Sunny Boy
Fig. 3.25:
Communication in a three-phase island grid
Please read Chapter 8.3 carefully!