SMA MULTICLUSTER BOX 12 - Manual (Page 24)

6 Electrical Connection SMA Solar Technology AG
24 MC-BOX-12-3-20-BE-en-10 Operating Manual
6.9 Connecting the Control Cables
6.9.1 Assignment of Spring-Cage Terminals
Figure 12: Overview of spring-cage terminals for connecting the control cables
6.9.2 Connecting the Control Cables of the Sunny Island Inverters
The Sunny Island inverters of the main cluster must be connected to the Multicluster Box via several control cables. These
control cables transmit measurement and control signals between the Sunny Island inverters of the main cluster and the
Multicluster Box.
Cable requirements:
☐ Conductor material: copper
☐ Conductor cross-section: 1.5 mm² to 2.5 mm²
Procedure:
1. Insert the control cables into the Multicluster Box (see Section 9.3.1, page 31).
2. Connect the cables to the spring-cage terminals X106, X112 and X113 (see Section 9.4.2, page 35):
• X106: control voltage of the main cluster
• X112: control cables from Sunny Island 1 of the main cluster
• X113: control cables from Sunny Island 2 of the main cluster
6.9.3 Connecting the BatFuse
Cable requirements:
☐ Conductor material: copper
☐ Conductor cross-section: 1.5 mm² to 2.5 mm²
Position Designation Explanation
A X106 Control voltage of the Sunny Island main cluster
B X107 DC supply for connection to the BatFuse
C X110 Connection of control cables from Grid Connect Box or NA Box
D X111 Connection of control cables from Grid Connect Box or NA Box
E X112 Connection of control cables to Sunny Island 1 of the main cluster
F X113 Connection of control cables to Sunny Island 2 of the main cluster