Creating An Rs485 Bus Connection - SolarEdge SE15K-AU 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 45.
RS485 wiring specifications:
Cable type: CAT6
Maximum nodes: 32
Maximum distance between first and last devices: 1 km /3300 ft
NOTE
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 DC Safety Unit 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 in Figure 27 .
Figure 27: RS485 terminal block on the communication board
4. Loosen the screws of pins A(+), B(-), and G on the left of the RS485 terminal block
(RS485-1 or RS485-2).
Three Phase Inverter with SetApp Configuration
Chapter 5: Setting Up Communication with the Monitoring Platform 44