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The communication port on the inverter is typically used by our communication sticks that collects data and share it in MyAutarco. When you have the 4-pin connector, this can also be used to wire RS485 connection to the inverter to use it with Modbus-TRU.
This port is a green port located externally on Autarco inverters on the bottom of the inverter. Newer models may have USB connection and a separate RS485 port. The wiring for the 4-pin connection is as following:
Pin 1 = +5 volts DC
pin 2 = -5 volts DC
Pin 3= +RS485
Pin 4 = -RS485
Checking the voltage on pins 1 and 2 with a multimeter will ensure power is provided to the communication device.
Checking the voltage on pins 3 and 4 with a multimeter will ensure RS485 signal between the inverter and the communication device. RS-485 voltage should read ~1.7Volts on DC
