RS485 communication systems
Each device [MASTER or SLAVE] has a connection port with 2 terminals that are used to communicate with that particular device over MODBUS RTU
Introduction RS485 is a widely used communication protocol in Solis inverters for data exchange with monitoring platforms, energy meters, and other BMS components. Ensuring proper RS485 functionality is essential for reliable system operation.
Checking the voltage across pins 1 and 4 with a multimeter will ensure power is provided to the communication device (ex: wifi datalogger). The voltage reading should be 5V on DC. Checking the voltage on pins 2 and 3 with a multimeter will ensure RS485 signal between the inverter and the communication device.
inverter, while inverters 2 and 3 are followers. RS485 is wired to B, A, and on inverter 1 to inverter 2 in the same order. Then three new wires connected in the same B, A, and G ports on inverter 2, with the other nd of the same three wires going to inverter 3.Verify the orientation of the RS485 termination
Select [Next]. The SMA RS485 Module enables SMA inverters to establish wired RS485 communication. The RS485 Module must only be installed in the following SMA inverters: • STP 50-40 (Sunny Tripower CORE1) The inverter still complies with the standard after the product has been installed.
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