SolarEdge SE7600A-US Installation Manual page 80

Creating an RS485 Bus Connection
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 recommend to use external surge protection
devices.
For details refer to:
protection.pdf. A surge protection device is available from SolarEdge.
https://www.solaredge.com/sites/default/files/rs485_surge_protection_kit_
installation_guide.pdf
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. Connect the grounding wire to the grounding bus-bar in
the Connection Unit.
NOTE
An additional RS485 port (RS485-E) is available from SolarEdge, allowing
configuration of multiple RS485 buses for communications in large sites; Refer to
http://www.solaredge.us/files/pdfs/RS485_expansion_kit_installation_guide.pdf).
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 Removing the Inverter Cover on page 44.
2. Remove the seal from one of the openings in communication gland and insert the wire through the
opening.
3. Pull out the 9-pin RS485 terminal block connector, as shown below:
78
http://www.solaredge.us/files/pdfs/lightning_surge_
Figure 38: The RS485 terminal block
SolarEdge-StorEdge Installation Guide MAN-01-00262-1.3