The communication between the Sunlight Group and the energy meter operates via an RS-485 serial bus or Modbus TCP.
It is recommended to use shielded cables with twisted pairs for optimal performance. For short distances, a twisted pair from a network cable (minimum CAT5e) can be used.
The following guidelines apply:
Maximum Distance: The total cable length, including the main cable and branches, is limited to 100 meters.
Connecting Multiple Energy Meters: The cable should be daisy-chained from meter to meter or branched off the main cable (branches must not exceed 1 meter).
Long Distances: It is recommended to install a 120Ω termination resistor at the end of the main cable and activate the termination resistor on the Sunlight GroupEMS.
You MUST give each devicea unique address on the RS485 bus. Check the device manual for instructions.
Use lower addresses first (1, 2, ...) because the Sunlight GroupEMS will find them faster!
For each device, it is generally recommended to keep the factory-default baud rate, parity, and stop bits. The Sunlight GroupEMS will scan those first.
