Overview
ACS580-01-09A5-4 is a wall-mounted low-voltage general-purpose inverter under the ACS580 series. It has a rated output power of 4kW and a rated output current of 9.4A. The output current is 7.2A under heavy load conditions and 8.9A under light load conditions. The overload capacity can reach 150% in 1 minute. Adaptable to three-phase 380-480V AC power supply, input frequency range 47.5-63Hz, equipped with 2 analog inputs, 2 analog outputs, 6 digital inputs and 3 digital outputs; including 1 RS-485 interface and 1 USB interface, supporting various communication protocols such as Modbus, Profinet IO, Ethernet/IP, etc.
FAQ:
1. Among the communication protocols supported by ACS580-01-09A5-4, which protocol is preferred when networking with PLC?
- Small and medium-sized simple scenarios: Prioritize Modbus RTU, standard RS-485 interface, no additional modules required, low cost, simple configuration, adaptable to mainstream economical PLC, and meet basic control needs.
- Medium and large complex systems: Choose Profinet IO when paired with Siemens PLC, which has high communication speed and supports real-time synchronization and remote diagnosis; choose Ethernet/IP when paired with Rockwell PLC to seamlessly integrate into its automation architecture, and an Ethernet module is required.
2.When ACS580-01-09A5-4 is adapted to an IE4 high-efficiency motor, how much energy efficiency can be improved compared to an IE2 motor? How to verify power saving in practical applications?
ACS580-01-09A5-4 is adapted to IE4 motors and has an energy efficiency improvement of 4%-5% compared to IE2 motors:
- Use the inverter’s built-in energy efficiency calculator, panel reading or Drive composer to export the accumulated energy saving data.
- Connect an external high-precision electric energy meter to record the power consumption of the two motors under the same working conditions and calculate the difference.
- Connect to the SCADA/PLC system to collect power and duration data over a long period of time to generate energy consumption trend comparisons.
3.What is the reason for the current difference between ACS580-01-09A5-4 under heavy load and light load conditions?
- Linear relationship between torque and current: The electromagnetic torque of an asynchronous motor is proportional to the active component of the stator current. Under heavy load conditions, the motor needs to output greater torque to drive high loads (such as a mixer running at full load), and the inverter will automatically increase the output current to ensure that the torque meets the load demand; under light load, the load resistance is small, the torque required by the motor is reduced, and the inverter simultaneously reduces the output current to avoid energy waste.
- Constant flux/variable flux control logic of the frequency converter: Using vector control technology, the rated flux of the motor is maintained under heavy load, and the current increases with the torque demand; the energy optimization function is enabled under light load, automatically reducing the flux and excitation current, thereby reducing the total output current and taking into account operating efficiency.
- Design limitations of overload capacity: Heavy load current (7.2A) is the rated value for long-term stable operation, matching the rated torque of the motor; light load current (8.9A) is the upper limit of current under low torque. Because the motor loss is small at light load, a slightly larger current is allowed for a short time without triggering the overload protection.


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