SMA Solar Technology AG Multicluster Operation
Technical Description SI5048-TB-TEN110340 133
Each Multicluster Piggy-Back (MC-PB) is delivered with one yellow and one gray RJ45 communication
cable and two plugs (termination resistors).
You require the yellow cable to establish communication between the master of the main cluster and
the masters of the extension clusters.
The gray cable is used for external communication (via RS485) needed for the system monitoring
(Sunny WebBox).
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.
RJ45 Cable
The RJ45 communication cable is a standard Cat5e-FTP cable (simple shielding), with gold
contacts.
Multicluster Piggy-Back
If just one cluster is used in connection with an MC-BOX, no Multicluster Piggy-Back is
required.
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