Connecting the Data Cable for the Internal Communication of the Cluster
Qualified person
In a cluster, the Sunny Island inverters communicate via a data cable (as included in the scope of delivery of this inverter).
Internal communication cabling (example)
Requirements:
The total length of the communication bus (A+B) must be less than 30 m. Keep in mind that the communication bus possibly connects several nodes.
PIN assignment of Com-Sync interface of Com-Sync interface for battery communication
Pin | Assignment |
|---|---|
1 | reserved by SMA, not usable |
2 | Ground (for battery and cluster communication) |
3 | SYNC-High (for cluster communication) |
4 | CAN-High (for battery communication) |
5 | CAN-Low (for battery communication) |
6 | SYNC-Low (for cluster communication) |
7 | reserved by SMA, not usable |
8 | reserved by SMA, not usable |
Procedure:
- Plug the data cable into a free pin connector ComSync on the Sunny Island ( > Connecting the Data Cable).
- Ensure that the SYNC communication bus is closed at each end, e.g. with a terminator.
By default, the Sunny Island has a RJ45 connector in the ComSyncOut socket. This RJ45 connector has an integrated 100 Ohm terminator between CAN-H and Can-L as well as between Sync-H and Sync-L. RJ45 connectors with a 120 Ohm resistor can be used for both bus systems (CAN and SYNC) in accordance with the CAN specifications.