Install Manual

Creating an RS485 Bus Connection
The RS485 option enables creating a bus of connected inverters, consisting of up to 31
follower inverters and 1 leader inverter. Using this option, inverters are connected to
each other in a bus (chain), via their RS485 connectors. The first and last inverters in the
chain must be terminated as described on page 65.
RS485 wiring specifications:
Cable type: CAT6 and higher with shielding protection of the twisted pairs of wires
and an outer foil or braided shielding
Wire cross-section area: 0.2- 1 mm²/ 24-18 AWG
Maximum nodes: 32
Maximum distance between first and last devices: 1 km /3300 ft.
 NOTE
If using a cable longer than 10 m/33 ft in areas where there is a
risk of induced voltage surges by lightning, it is recommended
to use external surge protection devices. For details refer to:
https://www.solaredge.com/sites/default/files/overvoltage_
surge_protection_na.pdf.
If grounded metal conduits are used for routing the communication wires, a
lightning protection device is not required.
If not using surge protection, connect the grounding wire to the first inverter
in the RS485 chain; ensure it is not in contact with other wires. For inverters
with a Safety Switch, connect the grounding wire to the grounding bus-bar
in the Safety Switch. Connect the grounding wire to the grounding bus-bar in
the Safety Switch.
The following sections describe how to physically connect the RS485 bus and how to
configure the bus.

Chapter 6: Setting Up Communication to the Monitoring Platform 63
Three Phase System Installation Guide MAN-01-00527-1.4