SMA Wireless-Set485-01 - Manual (Page 21)

SMA Solar Technology AG Electrical Connection
Installation Guide WirelessSet485-IEN091511 21
5.4.3 Connecting the Sunny WebBox to the RS485 Power Injector
RS485 Power Injector
1. Remove around 4 cm of cable sheath at the RS485
Power Injector end of the communication cable.
2. Shorten the shielding to 1.5 cm, fold it back, and
wrap it with conductive adhesive foil.
3. Connect the leads to the clamps (Data+, Data--,
GND) on the plug for the RS485 Power Injector.
Data+ and Data– must be a twisted lead pair.
4. Note the connection and lead color:
2 Data+ _____________________
7 Data-- _____________________
5 GND ____________________
5. Plug the plug into the RS485 Power Injector input
port (IN).
Sunny WebBox
6. Connect the leads on the Sunny WebBox side to
the clamps on the plug (2, 7 and 5) - see point 4.
7. Mount jumpers at the WebBox as is described in the Sunny WebBox manual
8. Plug the plug into the Sunny WebBox.
You have successfully connected the RS485 Power Injector to the Sunny WebBox.
If... Then...
The Sunny WebBox is at the center of the RS485
communication bus. - Do not establish termination (jumper A).
- Establish pull-up/pull-down of signal (jumpers B
and C).
The Sunny WebBox is at the end of the RS485
communication bus. - Establish termination (jumper A)
- Establish pull-up/pull-down of signal (jumpers B
and C).