Product Overview

The Schneider Electric ATV320U11M3C Variable Speed Drive is an Altivar Machine ATV320 frequency inverter designed for variable speed and torque control of three-phase AC motors in industrial machinery, OEM equipment, and automated production systems.

This model is designed for a 200–240 V AC three-phase power supply and is suitable for 1.1 kW (1.5 HP) motor applications. It converts fixed-frequency three-phase electrical power into a controlled variable-frequency output, allowing the connected motor to operate at adjustable speeds according to machine requirements.

The ATV320U11M3C uses a Compact-format enclosure, with specified dimensions of 105 × 143 × 138 mm and an approximate weight of 1.4 kg. Its relatively compact footprint makes it suitable for electrical cabinets and machine control panels where installation space needs to be used efficiently.

The drive provides more than basic motor starting and stopping. It supports adjustable speed control, controlled acceleration and deceleration, torque management, motor protection, dynamic braking, communication, and machine-oriented safety functions.

Typical applications include conveyors, packaging machinery, feeders, pumps, fans, material-handling systems, textile machinery, mechanical equipment, and OEM automation systems.

Technical Specifications

Function and Working Principle

The main function of the ATV320U11M3C is to regulate the speed and torque of a connected three-phase AC motor.

The drive receives a 200–240 V three-phase AC supply and converts it into a controlled variable-frequency output.

The basic power-conversion process is:

Three-Phase AC Input → Rectifier → DC Link → Inverter → Variable-Frequency Three-Phase Output → Motor

The incoming AC power is first converted into DC power. The inverter stage then uses high-speed semiconductor switching to generate a controlled three-phase output for the motor.

Motor speed is primarily controlled by changing the output frequency. The drive simultaneously regulates voltage and current to provide the torque required by the machine.

The ATV320U11M3C can therefore provide:

• Adjustable motor speed
• Controlled acceleration
• Controlled deceleration
• Soft starting
• Controlled stopping
• Torque regulation
• Low-speed operation
• Motor current monitoring
• Motor overload protection
• Dynamic braking
• Fault detection
• Alarm monitoring
• Speed reference management
• PLC-based motor control

The ATV320 platform supports sensorless flux vector control, allowing improved motor torque performance and speed regulation compared with simple V/F operation in suitable applications.

This is useful in machines where motor performance needs to remain stable while operating across different speeds and loads.

Role in Industrial Control Systems

The ATV320U11M3C normally serves as the motor-control device between the industrial power supply and the machine’s three-phase motor.

A typical control architecture can be represented as:

PLC / Controller → ATV320U11M3C → Three-Phase AC Motor → Mechanical Load

The PLC controls the overall machine sequence and process logic, while the variable speed drive performs the detailed electrical control of the motor.

For example, a PLC may issue a speed reference to the ATV320U11M3C according to the required production rate. The drive processes this reference and generates the appropriate motor output.

The drive can also provide operating information back to the controller.

Typical feedback information includes:

• Motor frequency
• Motor current
• Speed reference
• Drive status
• Warning conditions
• Fault conditions
• Operating state
• Diagnostic information

This allows the PLC to monitor motor operation and respond to abnormal conditions.

In a machine containing multiple motors, several ATV320 drives can be coordinated through a PLC or industrial network. Each drive can control an individual motor while the PLC manages synchronization between different machine sections.

Industrial Applications

Conveyor Systems

The ATV320U11M3C can control conveyor motors used in manufacturing, assembly, packaging, and material-handling systems.

Variable speed control allows the conveyor to synchronize with upstream and downstream production equipment.

Controlled acceleration and deceleration can also reduce mechanical stress on belts, rollers, couplings, and gear mechanisms.

Packaging Machinery

Packaging equipment often requires different motor speeds for feeding, indexing, conveying, and positioning.

The ATV320U11M3C can provide adjustable motor speed while allowing the PLC to coordinate the complete packaging sequence.

Feeders

Industrial feeding equipment can use variable speed control to adjust material flow according to production requirements.

The drive can therefore be used in suitable dosing and feeding mechanisms where motor speed is an important process variable.

Pumps

The ATV320U11M3C can control compatible pump motors where variable flow or pressure is required.

Variable speed operation allows the pump to respond to changing process requirements rather than operating continuously at a fixed speed.

Fans and Ventilation Equipment

Industrial fans can use the drive to adjust motor speed according to ventilation, cooling, or airflow requirements.

Material Handling

Rollers, transfer mechanisms, feeders, and other motor-driven material-handling equipment can use the ATV320U11M3C for adjustable speed operation.

Textile Machinery

Textile machines may require stable motor speed for winding, feeding, and material transportation.

The drive can provide adjustable speed and torque control for compatible applications.

OEM Machine Building

The Compact-format ATV320U11M3C is suitable for OEM machinery where a relatively small electrical cabinet footprint is required.

It can be installed together with PLCs, HMIs, circuit protection, sensors, communication devices, and other machine-control components.

Installation and System Integration

Correct installation is essential for reliable drive operation.

Before installing the ATV320U11M3C, engineers should verify:

• Three-phase input voltage
• Motor rated voltage
• Motor rated current
• Motor rated power
• Motor frequency
• Protective grounding
• Circuit protection
• Motor cable size
• Control wiring
• Cabinet ventilation
• EMC requirements
• Communication requirements
• Braking requirements

The ATV320U11M3C is designed for a 200–240 V AC three-phase supply.

Typical Installation Procedure

1. Disconnect and isolate the incoming electrical supply.
2. Verify that the drive and associated circuits are de-energized.
3. Mount the drive securely inside the control cabinet.
4. Install the drive in the recommended vertical orientation.
5. Provide adequate ventilation clearance.
6. Connect the three-phase AC input.
7. Connect the three-phase motor output.
8. Connect protective grounding.
9. Connect digital and analog control signals.
10. Connect communication wiring if required.
11. Enter the motor nameplate information.
12. Select the appropriate motor-control mode.
13. Configure acceleration and deceleration ramps.
14. Configure motor protection parameters.
15. Perform motor auto-tuning where applicable.
16. Verify motor rotation direction.
17. Perform a low-speed motor test.
18. Check drive status and diagnostic information.
19. Verify PLC or network communication.
20. Perform a complete machine test.

The drive should be installed with appropriate consideration for heat dissipation, cable routing, grounding, shielding, and electromagnetic compatibility.

Where the specific installation requires additional EMC filtering or other suppression components, these should be selected according to the machine electrical design.

Communication and Control Integration

The ATV320U11M3C provides communication capabilities for integration with industrial automation systems.

Standard communication functions include:

• Modbus Serial
• CANopen

Optional communication modules can extend the drive’s networking capabilities.

Depending on the selected communication option, the drive can be integrated with industrial networks such as:

• PROFIBUS DP V1
• PROFINET
• EtherNet/IP
• EtherCAT
• DeviceNet
• Ethernet Powerlink
• CANopen

Communication allows the PLC or controller to exchange control commands and operating data with the drive.

Typical information includes:

• Start commands
• Stop commands
• Speed references
• Frequency feedback
• Motor current
• Drive status
• Warning information
• Fault information
• Diagnostic information
• Parameter information

This makes the ATV320U11M3C suitable for automated machines where motor operation must be coordinated with sensors, actuators, PLC logic, and other drives.

For example, the PLC can send a speed reference to the drive while simultaneously monitoring motor current and drive status. If a fault occurs, the controller can identify the abnormal state and execute the appropriate machine response.

Compatible System Components

The ATV320U11M3C can be integrated with various industrial automation and electrical components.

The final selection of accessories should consider motor characteristics, supply conditions, braking requirements, EMC conditions, communication architecture, and machine safety requirements.

Recommended Alternative Models

The following ATV320 models can be considered for applications with similar motor-control requirements.

The ATV320U07M3C is appropriate for applications requiring approximately 0.75 kW of motor capacity.

The ATV320U15M3C can be considered when approximately 1.5 kW is required, while the ATV320U22M3C provides a higher 2.2 kW capacity.

For applications where only a single-phase 200–240 V supply is available, the ATV320U11M2B provides a useful alternative within the same ATV320 family.

When the machine uses a 380–500 V three-phase supply, the ATV320U11N4C may be a more suitable choice.

For replacement projects, the drive should not be selected by power rating alone. Engineers should verify motor rated current, supply voltage, overload requirements, physical dimensions, mounting arrangement, communication functions, EMC configuration, braking requirements, and safety requirements.

Key Advantages

• Altivar Machine ATV320 Compact format
• 1.1 kW (1.5 HP) motor rating
• 200–240 V AC three-phase input
• Three-phase motor output
• Approximately 5.5 A nominal output current
• 105 × 143 × 138 mm dimensions
• Approximately 1.4 kg weight
• Sensorless flux vector control
• V/F motor control
• Supports compatible asynchronous motors
• Supports compatible synchronous motors
• Output frequency up to approximately 599 Hz
• Adjustable switching frequency
• Integrated brake chopper
• Modbus serial communication
• CANopen communication
• Optional industrial network integration
• IP20 protection
• Fan-cooled design
• Machine-oriented safety functions
• Suitable for OEM machinery
• Suitable for compact control cabinets
• Suitable for conveyors
• Suitable for packaging equipment
• Suitable for feeders
• Suitable for pumps and fans
• Suitable for material-handling systems
• Suitable for textile machinery

Technical FAQs

What is the Schneider ATV320U11M3C?

The ATV320U11M3C is a 1.1 kW Altivar Machine ATV320 Variable Speed Drive designed to control compatible three-phase AC motors using a 200–240 V three-phase power supply.

What motor power does it support?

The ATV320U11M3C is designed for a 1.1 kW (1.5 HP) motor application.

What input voltage does it require?

The drive is designed for a 200–240 V AC three-phase supply.

What is the nominal output current?

The nominal output current is approximately 5.5 A for the specified drive rating.

What are the dimensions?

The specified dimensions are 105 × 143 × 138 mm.

How much does the ATV320U11M3C weigh?

The approximate weight is 1.4 kg.

What type of motor can it control?

The ATV320 platform supports compatible asynchronous motors and suitable synchronous motor applications.

Does it support sensorless vector control?

Yes. The ATV320U11M3C supports sensorless flux vector control, as well as V/F motor-control modes.

Does the drive have a braking function?

Yes. The ATV320 platform provides an integrated brake chopper for compatible dynamic-braking applications.

Which communication protocols are supported?

Standard communication includes Modbus Serial and CANopen. Optional communication modules can provide additional industrial networks such as PROFINET, EtherNet/IP, EtherCAT, PROFIBUS DP V1, DeviceNet, and other supported networks.

Can it communicate with a PLC?

Yes. The drive can be integrated with PLC systems for start/stop control, speed references, monitoring, diagnostics, and coordinated machine operation.

What safety functions are available?

The ATV320 platform supports machine-safety functions including Safe Torque Off (STO) and other safety functions depending on the configuration and application.

Where is the ATV320U11M3C commonly used?

Typical applications include conveyors, packaging machinery, feeders, pumps, fans, material-handling equipment, textile machinery, mechanical equipment, and OEM automation systems.

What is the difference between ATV320U11M3C and ATV320U11M2B?

Both models are designed for approximately 1.1 kW motor applications, but their input configurations differ. The ATV320U11M3C is designed for 200–240 V three-phase input, while the ATV320U11M2B is designed for 200–240 V single-phase input. Their physical formats and dimensions are also different.

What is the difference between ATV320U11M3C and ATV320U11N4C?

The primary difference is the input-voltage range. The ATV320U11M3C is designed for 200–240 V three-phase systems, while the ATV320U11N4C is intended for 380–500 V three-phase applications.

What should be checked before replacing an ATV320U11M3C?

Engineers should verify supply voltage, motor rated current, motor power, overload requirements, mounting dimensions, drive format, communication requirements, EMC configuration, braking requirements, and machine safety functions before selecting a replacement.

Conclusion

The Schneider Electric ATV320U11M3C Variable Speed Drive is a compact 1.1 kW AC frequency inverter designed for variable speed and torque control of three-phase AC motors in industrial machinery and OEM automation systems.

Designed for a 200–240 V AC three-phase supply, the drive provides adjustable motor speed, controlled acceleration and deceleration, sensorless flux vector control, motor protection, dynamic braking capability, communication functions, and machine-safety features.

Its specified 105 × 143 × 138 mm dimensions and approximately 1.4 kg weight make it suitable for machine control cabinets where compact installation is important. The Compact-format design allows machine builders to integrate motor control alongside PLCs, HMIs, sensors, circuit protection, and communication components.

The ATV320U11M3C can be used in conveyors, packaging machines, feeders, pumps, fans, material-handling systems, textile equipment, mechanical machinery, and other OEM applications requiring controlled three-phase motor operation.

For system integrators and maintenance engineers, proper model selection should consider the 200–240 V three-phase supply, 1.1 kW motor rating, motor rated current, overload requirements, physical dimensions, EMC configuration, communication architecture, braking requirements, and machine safety design.

When these parameters are correctly matched to the application, the ATV320U11M3C provides a flexible and compact solution for modern industrial motor speed control.