Multicluster Operation SMA America, LLC
138 SI5048U-TUS121440 Technical Description
16 Multicluster Operation
16.1 Communication between the Sunny Islands
For increased output, up to four Sunny Island clusters can be interconnected to form a Multicluster
system. For such a system, the Multicluster Box for Sunny Island 4548-US/5048-US/6048-US
(MCB12-U) is required. 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. The scope of delivery of the Multicluster Piggy-Back includes a PE cable. Install the PE
cable (B) as illustrated in the following figure.
Marker 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.
DC
Use copper conductors only
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