Creating 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 54.
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/lightning_
surge_protection.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 StorEdge Connection Unit, connect the grounding wire to the
grounding bus-bar in the StorEdge Connection Unit.
The following sections describe how to physically connect the RS485 bus and how to
configure the bus.
To connect the RS485 communication bus:
1. Remove the inverter cover as described in
Opening the Inverter Cover on page 31.
2. Open Communication Gland 1 and insert the cable through one of the openings.
3.
Remove the 3-pin connector from the RS485-2 port, as shown below, and loosen its
screws.
Chapter 7: Setting Up Communication with the Monitoring Platform 52
StorEdge Three Phase Inverter MAN-01-00648-1.3
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