SMA MC-Box 6.3 - Manual (Page 33)

SMA Solar Technology AG 6 Electrical Connection
Operating Manual MC-BOX-6_12-BE-en-20 33
6.4.2 Connecting the Data Cables for Control and Measuring
Signals
Procedure:
1. Plug the data cable for control and measuring signals (red) for the master of the main cluster in
the pin connector Mstr/L1.
2. Plug the data cable for control and measuring signals for Slave 1 of the main cluster in the pin
connector Slv1/L2.
3. Plug the data cable for control and measuring signals for Slave 2 of the main cluster in the pin
connector Slv2/L3.
6.4.3 Connecting the Data Cables for Communication
Procedure:
1. Plug the black data cable for the communication between Sunny Island and Multicluster Box in
the pin connector ComSyncIn. Leave the terminator plugged into the pin connector
ComSyncOut.
2. Plug the end of the data cable in the pin connector ComSyncIn of a Sunny Island inverter in
the main cluster. Since all Sunny Island inverters (master and slaves) of the main cluster are
connected via a communication bus, the Multicluster Box can be connected to a slave or the
master of the main cluster.