SMA Solar Technology AG Multicluster Operation
Technical Description SI5048-TEN093630 125
16 Multicluster Operation
16.1 Communication between the Sunny Island
For increased output, up to four Sunny Island clusters can be interconnected to form a multicluster
system. Within each cluster, a communication cable connects the master to the slaves. Each cluster is
connected to the others via another communication cable, connected to the respective master.
The Multicluster Piggy-Back (MC-PB) is mounted at the external communication plug-in position in the
Sunny Island. For orientation, refer to the following figure:
Position Description
A Multicluster Piggy-Back (MC-PB)
B Connection of the PE cable
C Cable route
Electrostatic discharge
Electrostatic discharges are an acute danger to the Sunny Island and to the communication
interface. Ground yourself before removing the communication interface from the
packaging, and before touching any components within the Sunny Island. To achieve this,
touch PE.
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