SMA SIC 50 - Manual (Page 27)

SMA Solar Technology AG Electrical Connection
Installation Guide SIC50-IA-en-11 27
6.6.3 SMA Operation
The communication between the charge controller and the Sunny Island 5048/2012/2224 allows
the charge controller to be controlled in a coordinated manner. This ensures precise calculation of the
state of charge in the Sunny Island without an additional battery current measuring shunt.
All important operating data of the charge controller can be read on the Sunny Island display. In
addition, the most important values are saved on the Sunny Island SD card.
Up to four charge controllers can be connected in parallel to one Sunny Island system.
More information on installing and connecting the SIC-PB communication interface can be found in
the SIC-PB installation guide.
Pin Assignment of the Micro Ribbon Cable
Pin Function Level Description
8 GND 0 V reference potential
10 GND 0 V reference potential
11 RXD TTL charge controller input
12 TXD TTL charge controller output
SIC50-MPT 1 SIC50-MPT 2 SIC50-MPT 3 SIC50-MPT 4
Sunny Island