SMA MULTICLUSTER BOX 12 - Manual (Page 26)

6 Electrical Connection SMA Solar Technology AG
26 MC-BOX-12-3-20-BE-en-10 Operating Manual
6.10 Connecting the Data Cables for Measurement Signals and
Communication
The data cables for measurement signals and communication are connected on the SIBUCTRL.
Figure 13: Overview of the connection area in the SIBUCTRL
Procedure:
1. Insert the data cables into the Multicluster Box (see Section 9.3.2, page 32).
2. Connect the data cables for measurement signals (red):
• for the master of the main cluster to pin connector X30 (Mstr/L1 BackupVtgCur)
• for slave 1 of the main cluster to pin connector X31 (Slv1/L2 BackupVtgCur)
• for slave 2 of the main cluster to pin connector X32 (Slv2/L3 BackupVtgCur)
3. Connect the data cable for communication between the Sunny Island inverters and the Multicluster Box (black) to
pin connector ComSyncIn.
4. Connect the other end of the data cable to pin connector ComSyncIn of a Sunny Island inverter in the main cluster.
Since all Sunny Island inverters of the main cluster (master and slaves) are interconnected via a communication bus,
the Multicluster Box can be connected to a slave or to the master of the main cluster (see documentation of the
Sunny Island inverter).
5. Ensure that the terminator is plugged into the pin connector ComSyncOut.
6.11 Mounting the Kick Plates
Requirement:
☐ All installation work must be completed.
Procedure:
1. Ensure that the power cables are retained with a strain relief.
2. Insert the kick plates and attach with the fastening screws (TX 30, torque: 21 Nm).
Position Designation
A Pin connectors for measurement signals (ComSyncIn, ComSyncOut)
B Pin connectors for communication (X30, X31, X32)