HJ32XX-HJ6300 series equipment RS485 wiring method to solve interference
During RS485 communication, it is required that the signal ground voltage difference between the two devices should not exceed 2V. Too high signal ground wire voltage may easily cause communication failure, which will seriously damage the communication chip and cause equipment damage.
During RS485 communication, try to connect the signal grounds of all RS485 devices together
When HJ3200/HJ6300 series equipment is connected to the inverter, try to keep the RS485 communication line away from the power wiring of the inverter, and use the shielded wire for the RS485 communication line, and connect the shielding layer to the ground.