SMA America, LLC Electrical Connection
Installation Guide SB50US-80US-eng-IUS112633 57
DC Connection with Additional DC Distribution, Positive Grounding
3. Tighten all cables in the terminal blocks in the SMA DC Disconnect with a torque of 15 in-
lb s .
(1.7 Nm).
6.6 Communication
The Sunny Boy can be retrofitted with a communication interface (for slot, see section 4.2 ”Locating
Internal Component Parts” (page 19)). As a result of this, the Sunny Boy can communicate with
special data capture devices (e.g. Sunny WebBox) or a PC with corresponding software (e.g. Sunny
Data).
You can find a complete list of all applicable options for communication at www.SMA-America.com
or in the product catalog.
In the documentation of the communication interface, you can find a detailed electrical circuit diagram
and information on usage.
1. Connect the negative DC cable to the terminal (A)
labeled COMBINED in the SMA DC Disconnect.
2. Connect the positive DC cable to the terminal (B)
labeled PV GROUNDED in the SMA DC Disconnect.
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