SMA SUNNY WEBBOX - Manual (Page 34)

Commissioning SMA Solar Technology AG / SMA America, LLC
34 SWebBox-BA-en-36 User Manual
6.9.2 Connecting the Sunny WebBox to the
RS485 Communication Bus
This section describes how to connect the Sunny WebBox to the RS485 communication bus.
It is assumed that the Sunny WebBox is located at the end of the RS485 communication bus.
1. Connect cables to the RS485 bus nodes as described in the bus node manual.
2. Remove 40 mm (1.57 in) from the cable sheath of the
RS485 communication cable on the side of the Sunny
WebBox.
3. Remove shielding until flush with cable sheath.
4. Strip the insulation from the ends of the insulated wires by approx. 6 mm (0.24 in).
DANGER!
Danger to life due to electric shock when opening the inverter.
• Any work on the inverter may only be carried out by a trained electrically skilled
person.
• Disconnect the inverter on the AC and DC sides as described in the inverter manual.
RS485 Cabling and terminal assignment in the system
See the RS485 cabling diagram for the system cabling and terminal assignment.
Connect the insulated wires of the cable correctly to the plug
Note the colour of the insulated wires of the communication cable.
2 | D+ ________________________
5 | GND ________________________
7 | D- ________________________