ACS355-03E-05A6-4 Variable Frequency Drive 2.2kW 5.6A 400V

The ACS355-03E-05A6-4 is a compact 2.2 kW variable frequency drive designed for controlling compatible three-phase AC motors in industrial machinery.

It operates from a three-phase 380–480 V AC supply and provides a rated output current of 5.6 A. These ratings distinguish this model from the lower-current 04A1 version and the higher-current 07A3 and 08A8 versions.

The drive supports both scalar control and sensorless vector control. It can be used with compatible AC induction motors and permanent-magnet motors when the required motor data and control parameters are configured correctly.

Built-in RS-485 communication supports Modbus RTU integration without requiring a separate basic communication adapter. Two analog inputs, one analog output, five digital inputs and programmable outputs allow the drive to connect to machine sensors, switches, controllers and control relays.

The R1 frame measures 239 × 70 × 161 mm and uses an IP20 open-type enclosure. It is intended for installation inside a suitable electrical control cabinet with adequate ventilation and environmental protection.

Key Differentiating Features

• Exact ACS355-03E-05A6-4 configuration
• Product identification number 3AUA0000058187
• 2.2 kW or 3 hp rated motor power
• 5.6 A rated output current
• Three-phase 380–480 V AC input
• Compact R1 frame
• IP20 open-type enclosure
• Sensorless vector and scalar motor control
• Support for induction and permanent-magnet motors
• Built-in RS-485 Modbus RTU communication
• Integrated Safe Torque Off input
• Eight-step sequence programming
• Integrated brake chopper
• Two analog inputs and five digital inputs
• Cabinet installation design
• Approximately 1.8 kg net weight
• Base ordering code supplied without a control panel

Understanding the Model Code

The complete ACS355-03E-05A6-4 designation should be checked when selecting a replacement drive.

A drive with a similar enclosure may have a different input phase, voltage class, output current or optional configuration. The complete model code must therefore be matched rather than selecting a drive by appearance alone.

Rated Power and Current

This model is rated for a 2.2 kW motor under normal-use conditions with a continuous output current of 5.6 A.

The 2.2 kW value is the rating of this specific model. The wider drive family includes other power levels, but the entire family power range must not be entered as the rating of ACS355-03E-05A6-4.

Final drive sizing should consider:

• Motor nameplate current
• Required continuous torque
• Starting and acceleration torque
• Operating speed range
• Repeated overload cycles
• Ambient temperature
• Installation altitude
• Switching frequency
• Motor-cable length
• Braking requirements

Do not select the drive only according to the motor’s kilowatt rating. The motor current and application duty cycle must also remain within the permitted drive ratings.

Three-Phase 380–480 V Input

The ACS355-03E-05A6-4 is intended for a three-phase 380–480 V AC supply.

It should not be connected to a single-phase supply or a 200–240 V system merely because another drive in the same product family supports those voltages.

Before installation, verify:

• Supply voltage
• Number of supply phases
• Supply frequency
• Required upstream protection
• Cable conductor size
• Protective grounding
• Short-circuit capacity
• Local electrical regulations

The output is intended for a compatible three-phase motor. Do not install contactors or disconnecting devices between the drive and motor unless the machine design and operating sequence specifically allow them.

Motor Control Functions

The drive supports scalar control and sensorless vector control.

Scalar control is suitable for general variable-speed applications where simple frequency-based motor control is sufficient.

Sensorless vector control provides improved speed and torque performance without requiring an external motor encoder in compatible applications. Correct motor nameplate data and motor identification settings are important for stable vector-control performance.

Compatible application requirements may include:

• Variable-speed operation
• Controlled acceleration
• Controlled deceleration
• Motor torque regulation
• Forward and reverse operation
• Multiple preset speeds
• Process-based speed references
• Motor protection monitoring

Motor suitability must be confirmed when operating above the motor’s base frequency or at prolonged low speed.

Built-In Inputs and Outputs

The drive provides configurable inputs and outputs for machine-control integration.

Standard control resources include:

• Two analog inputs
• One analog output
• Five digital inputs
• One digital output
• One relay output
• RS-485 communication
• Safe Torque Off connections

Analog inputs can be configured for compatible voltage or current reference signals. Digital inputs can be assigned to functions such as start, stop, direction, preset speed selection, fault reset or sequence control.

The exact terminal configuration and parameter assignments should be checked before replacing an existing drive. Existing machine wiring should not be transferred solely according to terminal position without comparing the wiring diagrams.

Modbus RTU Communication

RS-485 Modbus RTU communication is available as a standard feature.

It can be used to exchange commands, speed references, operating status, fault information and selected process values with a compatible PLC, HMI or supervisory controller.

Before connecting the drive to an existing network, confirm:

• Device address
• Baud rate
• Parity
• Stop-bit configuration
• Register mapping
• Communication timeout behavior
• RS-485 termination
• Cable shielding and grounding

Other industrial network protocols may be supported through compatible optional communication adapters. The required adapter is not part of the base ACS355-03E-05A6-4 ordering code.

Safe Torque Off

The drive includes a Safe Torque Off input designed to prevent torque-producing output when the safety circuit is activated correctly.

Safe Torque Off does not disconnect the incoming mains voltage and does not isolate hazardous electrical energy from the drive terminals. A suitable external disconnecting and isolation procedure is still required before maintenance.

Machine designers must complete the required safety assessment, wiring design, validation and documentation. The function must not be described as a complete emergency-stop system without evaluating the rest of the machine safety circuit.

Sequence Programming

Eight-step sequence programming allows simple operating sequences to be executed through the drive.

Depending on the programmed configuration, individual sequence states can control functions such as:

• Speed reference
• Acceleration time
• Deceleration time
• Running direction
• State duration
• Transition conditions
• Digital output status

This function can reduce the need for additional control logic in simple repetitive machinery. More complex coordinated processes should use an appropriate external controller.

Braking and Deceleration

An integrated brake chopper allows a compatible external braking resistor to be used when the motor returns regenerative energy during deceleration.

A braking resistor may be required for:

• Rapid stopping
• High-inertia loads
• Repeated deceleration cycles
• Vertical movement
• Unwinding equipment
• Reciprocating machinery

The braking resistor must be selected according to resistance, energy, duty cycle and thermal requirements. It is not automatically included with the base drive.

Incorrect resistor selection can overload the braking circuit or create an overheating risk.

Model Comparison

These models share the same voltage class and may have similar housings, but they have different current and motor-power ratings.

Using a higher- or lower-rated model may require changes to motor data, protection settings, cabinet cooling, wiring and machine parameters.

Dimensions and Cabinet Installation

The drive has an R1 frame with approximate dimensions of 239 mm high, 70 mm wide and 161 mm deep.

Its narrow width supports compact control-cabinet layouts. Adequate free space must still be maintained for cooling airflow, power wiring, motor wiring and control connections.

The IP20 enclosure does not provide protection against water or severe dust exposure. Install the drive inside a suitable cabinet that provides the environmental protection required by the machine.

The cabinet design should account for:

• Heat dissipation
• Ventilation direction
• Ambient temperature
• Cable separation
• Protective grounding
• Electromagnetic compatibility
• Access for commissioning
• Access for future replacement

Do not obstruct the drive’s cooling openings.

Control Panel and Accessories

The base ACS355-03E-05A6-4 ordering code is normally supplied without a control panel.

A compatible control panel may be required for local commissioning, parameter editing and fault diagnosis. Verify whether a panel is included in the actual supplied package before ordering.

Depending on the application, additional components may include:

• Basic or assistant control panel
• Panel mounting kit
• Fieldbus adapter
• External braking resistor
• Input or output choke
• EMC accessories
• Remote keypad cable
• PC commissioning connection
• Cabinet cooling equipment

Optional accessories should be selected according to the complete ordering code and machine requirements.

Typical Applications

• Conveyor systems
• Packaging machinery
• Food-processing equipment
• Material-handling equipment
• Printing machinery
• Textile machines
• Rubber-processing equipment
• Plastic-processing machinery
• Woodworking equipment
• Mixers and agitators
• Small pumps and fans
• Automated production machinery
• Replacement of an existing ACS355-03E-05A6-4
• Industrial control-panel maintenance

Replacement Checklist

Before ordering, confirm:

• Complete model ACS355-03E-05A6-4
• Product ID 3AUA0000058187
• Three-phase 380–480 V supply
• 5.6 A rated output current
• 2.2 kW motor rating
• R1 frame
• Existing motor nameplate
• Motor and power cable sizes
• Control terminal assignments
• Modbus communication settings
• Braking resistor configuration
• Optional adapter modules
• Control-panel requirement
• Existing parameter backup

The original parameter set should be recorded before removing the old drive. After installation, verify motor direction, current limits, acceleration and deceleration times, control-source selection, safety inputs and communication parameters before returning the machine to production.

Frequently Asked Questions

1. What is the rated power of ACS355-03E-05A6-4?

Its rated motor power under normal-use conditions is 2.2 kW or 3 hp.

2. What is the rated output current?

The rated output current is 5.6 A.

3. What input voltage does it require?

It requires a three-phase 380–480 V AC supply.

4. Can it operate from a single-phase supply?

This specific 03E configuration is designed for three-phase input. A single-phase connection should not be used unless specifically approved by the technical documentation and correctly derated.

5. What is the protection rating?

The standard enclosure is IP20 open type and is intended for installation inside a suitable control cabinet.

6. What frame size does this model use?

It uses the compact R1 frame.

7. Does it have built-in Modbus communication?

Yes. RS-485 Modbus RTU communication is available as a standard feature.

8. Is the control panel included?

The base ordering code is normally supplied without a control panel. Confirm the actual package contents before purchasing.

9. Does it support vector control?

Yes. It supports sensorless vector control as well as scalar motor control.

10. Can it control a permanent-magnet motor?

It supports compatible permanent-magnet motors when the drive firmware, motor characteristics and parameter configuration are suitable.

11. Does it include Safe Torque Off?

Yes. A Safe Torque Off input is built into the drive, but the complete machine safety function must be properly designed and validated.

12. Is a braking resistor included?

No. The drive includes a brake chopper, but a compatible external braking resistor must be selected separately when required.

13. What are the product dimensions?

The listed dimensions are approximately 239 × 70 × 161 mm.

14. What is the product net weight?

The current product data lists a net weight of approximately 1.8 kg, not 5.30 kg.

15. Can it directly replace a 04A1 or 07A3 model?

Not automatically. The current rating, motor parameters, protection settings, wiring and machine requirements must be checked before changing drive size.