SMA Solar Technology AG
6 Electrical Connection
Operating Manual
MC-BOX-6_12-BE-en-20
31
6.4 Data Cable Connection
The Multicluster Box transfers voltage and current measuring signals to the Sunny Island inverters.
These signals are transferred via the supplied data cables for control and measuring signals (red).
The Multicluster Box is controlled by the master in the main cluster via a CAN interface.
Before connecting the data cables in the Multicluster Box, you must insert the cables into the
Multicluster Box through the two-part cable feed-throughs (see Section 6.4.1 "Inserting the Data
Cables into the Multicluster Box", page 31). Afterwards, connect the cables (see Section 6.4.2,
page 33 and Section 6.4.3, page 33).
6.4.1 Inserting the Data Cables into the Multicluster Box
Procedure:
1. Loosen the screws of the mounting plate of the
two-part cable feed-through inside the
Multicluster Box.
2. Remove the mounting plate and set it aside.
3. Remove the cable feed-through from the enclosure.
Illustration of the enclosure openings
In the following instructions, the enclosure openings of the Multicluster Box 12.3 are illustrated
as an example. The enclosure openings and the procedure for inserting the data cables are
identical for both Multicluster Boxes, only the position of the enclosure openings is different.
