Creating An Rs485 Bus Connection - SolarEdge SEK-I Series Installation 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 71.
RS485 wiring specifications:
Cable type: Shielded Ethernet cable with a minimum of 3-wire twisted pair (CAT6
cable may be used)
Wire cross-section area: 0.2- 1 mm² 24-18 AWG (CAT6 cable should be used)
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 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.
The following sections describe how to physically connect the RS485 bus and how to
configure the bus.
To connect the RS485 communication bus:
1. Release the six Allen screws and carefully remove the Synergy Manager cover.
2. Remove the seal from one of the openings in communication gland #2 and insert
the wire through the opening.
3. Pull out the 6-pin RS485 terminal block connector, as shown below.
Three Phase Inverter with Synergy Technology P/N: SExxK-xxxxIxxxx SExxK-xxxxIxxxx
Chapter 6: Setting Up Communication with the Monitoring Platform 69