Multicluster Operation; Communication Between The Sunny Island Inverters - SMA SUNNY ISLAND 4548-US Operating Manual

SMA Solar Technology America LLC

16 Multicluster Operation

16.1 Communication between the Sunny Island Inverters

For increased output, up to four Sunny Island clusters can be interconnected to form a Multicluster
system. A Multicluster Box for Sunny Island 4548-US / 5048-US / 6048-US (MCB-12U) is required
for such systems. Within each cluster, a communication interface connects the master to the slaves.
Each cluster is connected to the others via another communication interface connected to the
respective master.
The Multicluster Piggy-Back (MC-PB) is plugged into the Sunny Island at the external communication
slot. The scope of delivery of the Multicluster Piggy-Back includes a grounding cable. Lay the
grounding cable (B) as illustrated in the following figure:
Position Description
A Multicluster Piggy-Back (MC-PB)
B Grounding cable connection
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.
Operating Manual
16 Multicluster Operation
SI4548-6048-US-BE-en-21 143