SMA SI 5048, Technical Description

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SMA Solar Technology AG Electrical Connection
Technical Description SI5048-TEN093630 49
6.5 Interface for External Communication
You can connect SMA Solar Technology communication devices (e.g., Sunny Boy Control, Sunny
WebBox) or a PC with the appropriate software to a communication interface. A detailed wiring
diagram can be found in the communication device manual, of the software or on the Internet at
www.SMA.de/en.
You can incorporate an RS485 communication interface into the Sunny Island.
6.5.1 Connection of the Interface
For connection, proceed as follows:
1. Remove the right plug of the two plugs in the rubber terminal area.
2. Feed the cable from the outside through the cable conduit (D) into the Sunny Island master.
3. Plug the cable into the "ComSmaIn" socket.
4. Place the plug around the cable.
5. Reinsert the plug in the opening provided in the rubber terminal area.
6. Lay the cable in area (C).
7. Connect the cable. Assignment pins in the RJ45 socket:
8. The RS485 data bus of the Sunny Island is terminated with a terminating resistor.
This terminating resistor is already plugged into the "ComSmaOut" socket. Please only remove
the plug if you want to connect another communication device.
Powerline modem
Communication via Powerline/Powerline modem is not possible in an off-grid system.
Communication in a cluster
Fitting of a communication interface in a cluster is only necessary on the master.
NOTICE!
Electrostatic discharges can damage the communication interface.
Internal components of the Sunny Island can be irreparably damaged by static discharge.
• Ground yourself before touching a component.
Assignment SubD -
Communication Device RS485 - signal assignment RJ45 - socket -
Sunny Island
2 A (Data+) 3
5 GND 2
7 B (Data − ) 6