SolarEdge SE3000H-US Installation Manual page 61

Creating an RS485 Bus Connection
6. For creating an RS485 bus - connect all B, A and G pins in all inverters. The following figure shows this
connection schema:
NOTE
Do not cross-connect B, A and G wires.
7. Tighten the terminal block screws.
8. Check that the wires are fully inserted and cannot be pulled out easily.
9. Push the RS485 terminal block firmly all the way into the connector on the right side of the
communication board.
10. Terminate the first and last SolarEdge device in the chain by switching a termination DIP-switch inside
the inverter to ON (move the left switch up). The switch is located on the communication board and
is marked SW2.
NOTE
Only the first and last SolarEdge devices in the chain should be terminated. The other inverters in
the chain should have the termination switch OFF (down position).
11. If not using surge protection, connect the grounding wire to the first inverter in the RS485 chain;
make sure the grounding wire is not in contact with other wires. For inverters with a DC Safety Unit,
connect the grounding wire to the grounding bus-bar in the DC Safety Unit.
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Single Phase Inverter with HD-Wave Technology Installation MAN-01-00306-1.1
Figure 30: Connecting the inverters in a chain
Figure 31: RS485 termination switch