Connecting Rs485 - SMA SUNNY ISLAND 8.0H Installation Manual

SMA Solar Technology AG
Cable requirement:
☐ The data cable must correspond to the CAT5e classification.
Requirement:
☐ The cable feed-through plate must be removed from every master (see Section 6.15.1).
1. If no SI-SYSCAN.BGx communication interface is installed, install SI-SYSCAN.BGx in every
master (see SI-SYSCAN-NR mounting instructions).
2. Remove the terminator from the SysCanOut socket on the master of the main cluster and plug
it into the SysCanIn socket.
3. Lead the yellow RJ45 data cable through the enclosure opening of the cable feed-through plate
on the master of the main cluster and plug the cable into the SysCanOut socket.
4. Lead the other end of the yellow RJ45 data cable through the enclosure opening of the cable
feed-through plate on the master of extension cluster 1 and plug it into the SysCanIn socket.
5. Connect the other extension clusters with each other as described in steps 3 and 4. Remove the
terminators here.
6. Leave the terminator plugged into the unused SysCanOut socket. The communication bus is
equipped with a terminating resistor at the end.
6.15.8 Connecting RS485
The SI-COMSMA.BGx communication interface is required for communication with a communication
device (e.g. Sunny WebBox) or other SMA products (e.g. PV inverter). If the off-grid inverter was
ordered with the "Communication for RS485" order option, the SI-COMSMA.BG1 is installed in every
master.
Plug assignment:
Figure 15: RJ45 plug assignment
Pin Signal
2 GND
3 Data ‒ (A)
6 Data + (B)
Installation Manual
Colour coding of the wires
Orange with white stripes
White with green stripes
Green with white stripes
6 Electrical Connection
SI80H-60H-OffGrid-IA-en-11 49