SMA SUNNY ISLAND 6048-US - Interface for External Communication; Connection of the Interface for External Communication

6 Electrical Connection SMA America, LLC
60 SI4548_6048-US-TB_en-13 Technical description
6.5 Interface for External Communication
You can connect SMA communication devices (e.g. Sunny Boy Control, Sunny WebBox) or a PC with
the appropriate software to a communication interface. You will find a detailed wiring diagram in the
communication device manual, the software or on the Internet at www.SMA-America.com.
You can incorporate an RS485 interface into the Sunny Island.
6.5.1 Connection of the Interface for External Communication
Powerline/Powerline modem (PLM)
Communication via Powerline/Powerline modem (NLM) is not possible in off-grid systems.
Communication in a cluster
Fitting a communication interface in a cluster is only necessary on the master.
Destruction of the communication interface through electrostatic discharge.
Internal components of the Sunny Island can be irreparably damaged by electrostatic discharge.
• Ground yourself before touching components.
Interface for external communication in backup systems
If a backup system is connected to the Sunny Island, the RS485 communication between the
Sunny Island and the PV inverters is necessary. For this, the following devices each need one
RS485 interface:
• the Sunny Island (if there are several Sunny Island inverters, the Sunny Island master)
•each PV inverter