... Printing and Dyeing Cable Washing Water supply Heating± 4. SY8000 AC DRIVE/VFD DATASHEET Itemdescription inputRated voltage, ... 30V DC/1ASerial communication portRS-485 connector RS485+,RS485-4 bits LED displaysetting frequency, output frequency, output voltage ... , under voltage, current limitation, over current, overload of inverter, overload of motor, overheat, overvoltage stallout, load short circuit ...