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- ATV320U04N4B
- Variable Speed Drive
- France
- 45 x 325 x 245 mm
- 2.5 kg
- Xiamen, China
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Product Overview
The Schneider Electric ATV320U04N4B Variable Speed Drive is a compact Altivar Machine ATV320 AC drive designed for industrial machinery, OEM equipment, and automated motor-control applications. It provides variable speed and torque control for small three-phase motors while offering a compact Book-format design for efficient electrical cabinet installation.
The ATV320U04N4B is designed for 380–500 V AC three-phase power supplies and is suitable for motors with a rated power of 0.37 kW (0.5 HP) under heavy-duty operating conditions. This voltage class makes the drive particularly useful for industrial facilities where 400 V or 480 V three-phase power systems are commonly available.
As a variable frequency drive, the ATV320U04N4B converts the incoming fixed-frequency AC supply into a controlled motor output. This allows the connected motor to operate at adjustable speeds and provides controlled acceleration, deceleration, braking, and torque management.
The model uses a narrow Book-format enclosure, with specified dimensions of 45 × 325 × 245 mm and an approximate weight of 2.5 kg. Its vertical, space-efficient design is suitable for machine control cabinets where width is limited but sufficient cabinet height is available.
The ATV320U04N4B can be applied to conveyors, packaging equipment, pumps, fans, feeders, material-handling machinery, textile equipment, and other automated machines requiring controlled three-phase motor operation.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Schneider Electric |
| Product Series | Altivar Machine ATV320 |
| Model | ATV320U04N4B |
| Product Type | Variable Speed Drive |
| Drive Format | Book |
| Rated Motor Power | 0.37 kW (0.5 HP) |
| Supply Voltage | 380–500 V AC |
| Input Supply | Three-phase |
| Motor Output | Three-phase AC |
| Supply Frequency | 50–60 Hz |
| Motor Compatibility | Asynchronous and Synchronous Motors |
| Control Technology | Sensorless Flux Vector Control, V/F Control |
| Protection Rating | IP20 |
| Cooling Method | Fan-cooled |
| Integrated Brake Chopper | Yes |
| Communication | Modbus Serial, CANopen |
| Safety Functions | STO, SS1, SLS |
| EMC | Integrated EMC functions |
| Mounting | Panel / Cabinet Mounting |
| Dimensions | 45 × 325 × 245 mm |
| Weight | 2.5 kg |
| Typical Application | Industrial Machinery and OEM Automation |
Function and Working Principle
The primary function of the ATV320U04N4B is to regulate the speed and torque of a three-phase AC motor.
A conventional direct-on-line motor starter generally provides fixed-frequency operation, while a variable speed drive allows the motor to operate at different speeds according to the machine process.
The basic operating principle is:
Three-Phase AC Input → Rectifier → DC Bus → Inverter → Variable-Frequency AC Output → Motor
The drive first converts the incoming AC supply into DC power. The inverter stage then reconstructs this energy into a controlled three-phase output.
By adjusting output frequency and voltage, the drive can control motor speed and torque.
Important functions include:
- Variable motor speed
- Controlled acceleration
- Controlled deceleration
- Motor starting and stopping
- Torque regulation
- Motor current monitoring
- Overload protection
- Dynamic braking
- Fault detection
- Alarm monitoring
- Communication-based control
The sensorless flux vector-control capability allows the drive to provide more sophisticated motor performance than basic V/F control in applications requiring improved low-speed torque and speed regulation.
Role in Industrial Control Systems
The ATV320U04N4B normally operates as the motor-control component within a larger automation system.
A typical architecture may be arranged as:
PLC → Control Command / Speed Reference → ATV320U04N4B → AC Motor → Machine
The PLC or machine controller manages production sequences and determines the required motor operating conditions. The ATV320U04N4B receives these commands and controls the electrical output delivered to the motor.
The drive can also provide operating information to the control system.
Typical monitored information includes:
- Output frequency
- Motor current
- Drive status
- Speed reference
- Alarm status
- Fault status
- Operating state
- Diagnostic information
This arrangement separates machine logic from motor power control and allows machine builders to create modular automation systems.
For industrial OEM applications, this can simplify machine development because the same drive-control architecture can be adapted to different machine functions.
Industrial Applications
Conveyor Systems
The ATV320U04N4B can regulate the speed of small conveyor motors in manufacturing, packaging, and material-handling applications.
Controlled acceleration and deceleration can help reduce mechanical stress on belts, rollers, gears, and transported products.
Packaging Equipment
Packaging machines often require controlled speed for feeding, indexing, conveying, and positioning mechanisms.
The drive can provide adjustable motor speed according to production requirements.
Pumps
Small industrial pumps can use variable speed control to adjust flow according to process demand.
Instead of operating continuously at a fixed speed, the motor can be controlled according to the actual process requirement.
Fans
The drive can regulate fan speed in industrial ventilation and cooling systems.
This provides flexible airflow control and can reduce unnecessary motor operation at full speed.
Material Handling
The ATV320U04N4B can be integrated into feeders, rollers, transfer mechanisms, and other equipment where controlled motor speed is required.
Textile Machinery
Textile equipment frequently requires stable motor speed for feeding, winding, and material movement.
The drive can provide adjustable speed control for these applications.
OEM Machinery
The Book-format design is useful for machine builders who need to integrate a variable speed drive into a narrow control cabinet.
Installation and System Integration
Correct electrical installation and parameter configuration are essential for safe and reliable operation.
Before installation, engineers should confirm:
- Three-phase input voltage
- Motor rated voltage
- Motor rated current
- Motor power
- Motor frequency
- Grounding arrangement
- Circuit protection
- Motor cable specifications
- Cabinet ventilation
- EMC requirements
- Communication configuration
Because the ATV320U04N4B is designed for a 380–500 V three-phase supply, the electrical system must be verified before the drive is connected.
Typical Installation Procedure
- Isolate the incoming electrical supply.
- Confirm that the installation is completely de-energized.
- Mount the drive securely inside the cabinet.
- Install it in the recommended vertical orientation.
- Provide adequate ventilation space.
- Connect the three-phase AC input.
- Connect the motor output.
- Connect protective grounding.
- Install control wiring.
- Connect communication wiring if required.
- Enter the motor nameplate parameters.
- Select the appropriate motor-control mode.
- Configure acceleration and deceleration times.
- Configure motor protection parameters.
- Perform motor auto-tuning when applicable.
- Verify motor rotation.
- Perform a low-speed commissioning test.
- Check communication and diagnostic signals.
- Test the complete machine.
Cable routing should be carefully planned to reduce electromagnetic interference between motor-power cables and low-level control or communication cables.
Communication and Control Integration
The ATV320U04N4B supports integration into industrial automation systems through its communication capabilities.
Modbus serial communication can be used to exchange drive commands, operating information, and diagnostic data with compatible automation equipment.
CANopen provides another option for distributed machine architectures.
Communication can be used for:
- Start commands
- Stop commands
- Speed references
- Frequency monitoring
- Current monitoring
- Drive status
- Alarm monitoring
- Fault information
- Parameter management
This capability makes the ATV320U04N4B suitable for machines where multiple motor drives need to operate under coordinated PLC control.
Compatible System Components
The ATV320U04N4B can be combined with various automation and electrical components.
| Component | Function |
|---|---|
| Schneider Modicon PLC | Machine sequence and process control |
| HMI | Operator interface and monitoring |
| Three-Phase AC Motor | Mechanical power output |
| SoMove Software | Drive setup and diagnostics |
| EcoStruxure Machine Expert | Machine automation engineering |
| Modbus Devices | Serial communication |
| CANopen Devices | Distributed machine networking |
| Braking Resistor | Dynamic braking |
| Line Choke | Input power conditioning |
| Motor Choke | Motor-side protection |
| EMC Filter / Components | Electromagnetic interference control |
| Circuit Breaker | Overcurrent and short-circuit protection |
| Safety Relay | Machine safety control |
| Proximity Sensor | Position detection |
| Limit Switch | Machine-position monitoring |
Accessory selection should be based on the actual motor characteristics, braking requirements, electrical network, installation environment, and machine safety architecture.
Recommended Alternative Models
The following ATV320 models can be considered for applications with similar motor-control requirements.
| Model | Type | Key Feature | Typical Application |
|---|---|---|---|
| ATV320U02N4B | Variable Speed Drive | 0.18 kW, 380–500 V, 3-phase | Small Machinery |
| ATV320U04N4B | Variable Speed Drive | 0.37 kW, 380–500 V, 3-phase | Compact Industrial Machines |
| ATV320U06N4B | Variable Speed Drive | 0.55 kW, 380–500 V, 3-phase | Conveyors and Pumps |
| ATV320U07N4B | Variable Speed Drive | 0.75 kW, 380–500 V, 3-phase | Fans and Material Handling |
| ATV320U11N4B | Variable Speed Drive | 1.1 kW, 380–500 V, 3-phase | Medium Machine Applications |
| ATV320U15N4B | Variable Speed Drive | 1.5 kW, 380–500 V, 3-phase | Industrial Automation |
When selecting an alternative, motor power alone should not be used as the deciding factor. Supply voltage, overload capability, enclosure format, mounting dimensions, communication requirements, and application duty should also be considered.
Key Advantages
- Compact Altivar Machine ATV320 design
- 0.37 kW (0.5 HP) motor rating
- Designed for 380–500 V AC three-phase systems
- Three-phase AC motor output
- Narrow 45 mm housing
- 325 mm height
- 245 mm depth
- Approximately 2.5 kg weight
- Book-format installation
- Sensorless flux vector control
- Supports asynchronous motors
- Supports compatible synchronous motors
- Adjustable motor speed and torque
- Integrated brake chopper
- Modbus serial communication
- CANopen communication
- STO safety function
- SS1 safety function
- SLS safety function
- IP20 protection
- Suitable for OEM machinery
- Suitable for industrial automation
- Supports centralized PLC control
- Flexible machine integration
Technical FAQs
What is the Schneider ATV320U04N4B?
The ATV320U04N4B is a 0.37 kW Altivar Machine ATV320 Variable Speed Drive designed for controlling three-phase AC motors in industrial machinery and OEM automation systems.
What motor power does the ATV320U04N4B support?
The drive is designed for a 0.37 kW (0.5 HP) motor under the specified heavy-duty application rating.
What input voltage does it use?
The ATV320U04N4B is designed for a 380–500 V AC three-phase supply.
What are the dimensions?
The specified dimensions are 45 × 325 × 245 mm.
What is the product weight?
The approximate weight is 2.5 kg.
Is the ATV320U04N4B a single-phase drive?
No. The ATV320U04N4B is designed for a three-phase input supply in the 380–500 V range.
What type of motors can it control?
The ATV320 platform supports compatible asynchronous and synchronous motors.
Does it support sensorless vector control?
Yes. Sensorless flux vector control is available for applications requiring improved speed and torque performance.
Does the drive include a brake chopper?
Yes. The drive includes an integrated brake chopper for compatible dynamic-braking applications.
Which communication protocols are supported?
The ATV320U04N4B supports Modbus serial communication and CANopen.
Can the drive be integrated with a PLC?
Yes. It can be integrated into PLC-based machine-control systems for speed references, start/stop commands, status monitoring, and fault diagnostics.
What safety functions are available?
The ATV320 platform provides safety functions including Safe Torque Off (STO), Safe Stop 1 (SS1), and Safely Limited Speed (SLS).
Where is the ATV320U04N4B commonly used?
Typical applications include conveyors, packaging machines, pumps, fans, feeders, material-handling equipment, textile machinery, and other OEM industrial machines.
What is the main difference between the ATV320U04N4B and ATV320U04M3C?
Both models are designed for 0.37 kW applications, but their input-voltage configurations are different. The ATV320U04N4B is designed for 380–500 V three-phase systems, while the ATV320U04M3C is intended for the lower 200–240 V three-phase voltage range.
Conclusion
The Schneider Electric ATV320U04N4B Variable Speed Drive is a compact 0.37 kW industrial AC drive designed for three-phase motor-control applications where a higher industrial supply voltage is required. Its 380–500 V three-phase input makes it suitable for industrial electrical systems commonly based on higher-voltage three-phase distribution.
The drive combines adjustable speed control, sensorless flux vector technology, braking capability, communication functions, and machine-oriented safety features in a compact Book-format enclosure. With specified dimensions of 45 × 325 × 245 mm and a weight of approximately 2.5 kg, it can be installed efficiently in narrow control cabinets.
For OEM machine builders, automation engineers, system integrators, and maintenance professionals, the ATV320U04N4B can provide reliable motor control for conveyors, packaging equipment, pumps, fans, feeders, textile machinery, and other automated industrial equipment.
When selecting this model, the most important factors are the motor’s rated power and current, the 380–500 V three-phase supply requirement, application duty, installation dimensions, communication architecture, braking requirements, and machine safety requirements. Properly matched to the application, the ATV320U04N4B provides a flexible and compact solution for modern industrial motor-control systems.