SMA Solar Technology AG
Electrical Connection of the Automatic Switch Box S
Technical Description
SBU2200-TEN083320
79
8.3 Communication
The Automatic Switch Box S is connected to the Sunny
Backup 2200 via two communication cables. This is
also explained in section 7.5.1 „SBU 2200 and
Automatic Switch Box S“ (61).
Install the communication cables as follows:
1. Loosen the preinstalled cable opening gasket
on the lower left corner of the base of the
housing.
2. Take the entire feed-through element out of the
installation opening.
3. Place each cable end equipped with an RJ45
plug into one of the hollowed out sections of the
internal rubber insert.
Make sure the cable is long enough to reach
from the bottom of the housing to the desired
connection sockets.
4. Insert the RJ45 plug of the black communication
cable into the "SyncIn" connection socket. The
plug will audibly snap into place.
5. Insert the RJ45 plug of the red communication
cable into the "Backup" connection socket. The
plug will audibly snap into place.
6. Re-assemble the feed-through element and insert it in the installation opening on the housing.
Terminating the CAN bus
The CAN bus must be terminated at both ends with terminating plugs. The "SyncOut" socket
on the circuit board of the Automatic Switch Box S comes with a pre-installed terminating
plug for this reason. The other end of the bus is located on the connected Sunny Backup
2200.
