SMA SC-COM - Manual (Page 10)

3 Product Description SMA Solar Technology AG
10 SC-COM-BE-en-20 Operating Manual
The SC-COM is equipped with serial interfaces to ensure the availability of these functions. These include, for example:
• Three LAN interfaces
• RS485 interface for communication with devices used for string-current monitoring
• Interfaces for the communication with internal inverter components
These SC-COM interfaces are wired during production. When installing the Sunny Central, connect the external data
cables to the customer connection terminals in the Sunny Central.
3.2 Network Concept
In order to transmit the data faster and more efficiently, the SC-COM is equipped with two additional LAN interfaces.
This enables two separate networks to be created as required. Due to the two separate networks, a faster rate of data
communication with extremely short response times is achieved. If your network has sufficient data transmission speed,
one network may be sufficient for both types of data.
Figure 3: Basic principle of communication in large-scale PV power plants (example)