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Chapter 3: Connecting the Firefighter Gateway
to the Installation
Overview
The Firefighter Gateway connects to the PV system installation using the RS485
communication option. The RS485 option enables creating a chain (bus) of up to 31
slave SolarEdge devices, connected to one master, which can be another SolarEdge
device or the Firefighter Gateway.
NOTE
Only SolarEdge devices (inverters, Commercial Gateways (CCGs) and
Dataloggers) are allowed on the RS485 communication bus.
The following is an example of a slave gateway connected to a chain of slave inverters
(one inverter is the master).
Figure 6: Example of RS485 connection
The following sections describe how to connect the RS485 bus and how to configure its
components.
Creating an RS485 Bus Connection
The RS485 bus uses a three-wire cable connecting the RS485-1 terminal blocks on the
Firefighter Gateway to the RS485 input of the inverters.
To connect the RS485 communication bus between inverters and the Firefighter
Gateway:
1. Use one of the supplied 3-pin terminal blocks: Loosen the screws and insert the wire
ends into the A, B and G pins. For connections longer then 10m use twisted pair
wires for A and B wires.
Chapter 3: Connecting the Firefighter Gateway to the Installation
18
Firefighter Gateway Installation Guide MAN-01-00113-1.4