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20G11ND040JA0NNNNN — PowerFlex 755 AC Drive

1. Product Overview

The 20G11ND040JA0NNNNN is a PowerFlex 755 series air-cooled AC variable frequency drive designed for three-phase industrial motor control.

It is a 480 VAC, three-phase, 40 A drive with a 30 HP normal-duty rating and a 25 HP heavy-duty rating. The unit uses Frame 3 construction and is intended for installation in a suitable protected electrical enclosure.

This configuration includes embedded EtherNet/IP communication, forced-air cooling, AC input with DC terminals, dynamic-braking transistor, and EMC filtering with the CM jumper installed. It is supplied in an IP20/IP00, NEMA/UL open-type configuration and does not include a local HIM display.

The drive is particularly appropriate for industrial machinery where adjustable motor speed, controlled acceleration and deceleration, network communication, diagnostics and flexible motor-control functions are required.

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2. Basic Product Information

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3. Brand

The product belongs to the Allen-Bradley brand.

Allen-Bradley products are widely used in industrial motor control and automation systems, and the PowerFlex family is positioned for applications where variable-speed AC motor control is required.

For the 20G11ND040JA0NNNNN, the brand and series are especially relevant because the drive is designed to integrate with industrial control architectures rather than operate only as an independent motor speed controller.

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4. Product Series

The product belongs to the:

PowerFlex 755 Series

The PowerFlex 755 is an advanced AC drive platform intended for medium- and higher-performance industrial motor applications.

Compared with a basic variable frequency drive, this series offers a broader range of control and expansion capabilities.

Typical capabilities associated with the series include:

• Variable-speed motor control
• Adjustable acceleration and deceleration
• V/Hz control
• Sensorless vector control
• Flux vector control
• Encoder feedback options
• EtherNet/IP communication
• Dynamic braking
• Drive diagnostics
• Parameter monitoring
• Additional I/O options
• Communication expansion
• Feedback expansion
• Safety-related options

The modular design makes the series suitable for machines that may require additional functions as the automation system develops.

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5. Model Number

The complete catalog number is:

20G11ND040JA0NNNNN

The model designation identifies the main electrical, mechanical and functional configuration.

The 040 portion is especially important because it identifies the 40 A output-current class.

This gives the drive a 30 HP normal-duty and 25 HP heavy-duty application rating.

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6. Main Electrical Specifications

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7. Normal-Duty Rating

The normal-duty rating of the drive is:

40 A / 30 HP / approximately 22 kW

This rating makes the drive suitable for many medium-sized industrial motors.

Normal-duty applications generally involve loads where the motor operates within a relatively predictable load profile and does not continuously experience severe overload conditions.

Typical applications include:

• Pumps
• Fans
• Blowers
• Conveyors
• Material-handling equipment
• General machinery
• Processing equipment
• Air-handling systems
• Industrial production equipment

The motor’s actual nameplate current should always be checked before final drive selection.

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8. Heavy-Duty Rating

The heavy-duty rating is:

34 A / 25 HP / approximately 18.5 kW

The heavy-duty rating provides additional flexibility for applications where the motor experiences more demanding load conditions.

Typical examples include:

• High-load conveyors
• Mixers
• Material-handling machinery
• Machinery with frequent acceleration
• Machinery with frequent deceleration
• Equipment with high starting torque

The heavy-duty rating should be considered together with the motor’s actual full-load current and the required overload profile.

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9. Dimensions and Weight

The drive uses Frame 3 construction.

The approximate physical envelope is:

454 mm × 190 mm × 212 mm

with height, width and depth normally considered in that order.

The dimensions refer to the drive itself and should not be treated as the required cabinet dimensions.

Additional cabinet space is needed for power cables, control wiring, network cables, ventilation and maintenance access.

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10. Product Weight

The product weight is approximately:

11.5 kg

The exact shipping weight can be higher because of packaging and accessories.

The installed weight can also vary slightly if additional option modules or mounting accessories are added.

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11. Enclosure Type

The drive uses an:

IP20/IP00 — NEMA/UL Open-Type Configuration

This type of drive is intended to be installed in an appropriate electrical cabinet or protected enclosure.

It should not be regarded as a fully sealed outdoor or washdown-rated drive.

The surrounding enclosure should provide protection against:

• Dust
• Moisture
• Water
• Conductive contamination
• Corrosive substances
• Mechanical impact

The final protection level of the installation therefore depends on the cabinet and installation environment.

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12. Cooling System

The 20G11ND040JA0NNNNN uses forced-air cooling.

During operation, power semiconductor devices and other electrical components generate heat.

The internal cooling system moves air through the drive’s heat-dissipation structure to maintain suitable operating temperatures.

Good cabinet design should therefore provide adequate airflow.

Important considerations include:

• Ambient temperature
• Cabinet temperature
• Airflow
• Fan condition
• Drive loading
• Installation spacing
• Other heat-generating components

A cabinet containing several drives should be evaluated based on the total heat load rather than considering only one drive.

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13. Embedded EtherNet/IP

The drive includes embedded EtherNet/IP communication.

This is one of the most useful features for modern automated machinery.

The drive can communicate operating and control information through an industrial Ethernet network.

Typical information includes:

This communication capability can reduce hardwired control requirements and make the drive easier to integrate into an automated production system.

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14. Dynamic Braking

The 20G11ND040JA0NNNNN includes an internal:

Dynamic-Braking Transistor

Dynamic braking is useful when the driven machine has substantial rotating inertia or requires relatively rapid controlled stopping.

During deceleration, energy from the motor can return to the drive’s DC bus.

A suitable braking resistor can then dissipate this energy.

Typical applications include:

• High-inertia conveyors
• Material-handling systems
• Mixers
• Rapid-deceleration machinery
• Rotating equipment
• Machines requiring controlled stopping

The internal transistor is the switching element for the braking circuit. The braking resistor and braking capacity must be selected according to the machine’s actual requirements.

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15. EMC Filtering

The model is configured with:

Filtered / CM jumper installed

This configuration is intended to assist with electromagnetic compatibility in appropriate industrial installations.

However, good EMC performance depends on the complete electrical installation.

The following factors remain important:

• Motor cable selection
• Cable shielding
• Grounding
• Cable routing
• Separation of power and signal cables
• Cabinet grounding
• Correct motor grounding
• Appropriate termination

The integrated filtering should therefore be regarded as one part of the overall EMC design.

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16. Motor-Control Capability

The PowerFlex 755 platform supports advanced AC motor-control functions.

Depending on the selected configuration and installed options, the drive can be used with several control methods.

V/Hz Control

V/Hz control is suitable for relatively simple variable-speed applications.

Common examples include:

• Fans
• Pumps
• Blowers
• Simple conveyors

Sensorless Vector Control

Sensorless vector control can provide better torque and speed performance than basic V/Hz control.

It is useful where the load varies during operation.

Flux Vector Control

Flux vector control can provide more advanced control of motor flux and torque.

This is useful for machinery requiring stronger dynamic performance.

Feedback-Based Control

Feedback modules can be used where the application requires more precise speed or position-related control.

This is particularly useful in applications where speed regulation is more critical.

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17. Product Introduction

The 20G11ND040JA0NNNNN is designed to control the speed and torque of three-phase AC motors in industrial environments.

A conventional motor connected directly to a fixed-frequency supply generally operates at a relatively fixed speed.

A variable frequency drive changes the electrical frequency and voltage supplied to the motor.

This allows the motor to:

• Start smoothly
• Accelerate gradually
• Run at different speeds
• Decelerate in a controlled manner
• Respond to changing production requirements
• Communicate operating conditions to the automation system

The result is a more flexible motor-control system.

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18. Main Applications

Conveyor Systems

The drive is well suited to conveyor systems where motor speed needs to be controlled.

A conveyor can run at different speeds according to production requirements.

Controlled acceleration can also reduce mechanical stress on:

• Belts
• Rollers
• Gearboxes
• Couplings
• Shafts
• Mechanical drive components

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Pumps

The drive can regulate pump speed according to process demand.

Typical applications include:

• Water circulation
• Industrial fluid transfer
• Cooling systems
• Process pumps
• Water treatment
• Pressure-control systems

Variable-speed control can provide better process flexibility than simple motor starting and stopping.

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Fans

Industrial fans frequently need to operate at different airflow levels.

The drive can adjust the motor speed to match the required airflow.

Typical applications include:

• Factory ventilation
• Exhaust systems
• Cooling systems
• Air-handling systems
• Industrial ventilation

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Blowers

Blowers can also benefit from adjustable speed.

The drive can respond to changing process requirements and regulate airflow without requiring the motor to operate continuously at maximum speed.

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Mixers

Mixers can have changing torque requirements during a production cycle.

The drive can provide controlled acceleration and adjustable running speed.

For particularly demanding mixers, the heavy-duty current rating should be carefully compared with the motor’s nameplate current.

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Material Handling

Material-handling systems often require controlled movement.

The drive can provide:

• Adjustable speed
• Smooth acceleration
• Controlled deceleration
• Forward/reverse operation
• Network communication
• Drive diagnostics

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19. Application Comparison

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20. Main Product Advantages

20.1 30 HP Normal-Duty Capacity

The 30 HP normal-duty rating gives this drive enough capacity for many medium-power industrial machines.

It is particularly useful where a motor requires a higher current rating than smaller PowerFlex drive configurations can provide.

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20.2 25 HP Heavy-Duty Capacity

The 25 HP heavy-duty rating makes the drive suitable for more demanding applications than a simple light-duty inverter.

This is useful for equipment with greater starting torque or repeated load changes.

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20.3 40 A Output Rating

The 40 A normal-duty output rating is an important selection parameter.

Motor selection should be based on actual motor current rather than horsepower alone.

This is especially important when the motor operates under high ambient temperature, high altitude or demanding duty cycles.

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20.4 Embedded EtherNet/IP

The integrated network interface allows the drive to become part of the larger automation system.

This can simplify:

• Start/stop control
• Speed control
• Monitoring
• Diagnostics
• Fault management
• Parameter management

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20.5 Dynamic Braking Transistor

The internal braking transistor makes the drive more suitable for applications that require controlled deceleration.

This is especially useful for high-inertia machinery.

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20.6 Modular Architecture

The PowerFlex 755 architecture supports additional modules.

Depending on application requirements, expansion can include:

• Encoder feedback
• Dual encoder feedback
• Universal feedback
• Additional communications
• I/O
• Safety functions
• Other application-specific options

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20.7 Advanced Diagnostics

Drive diagnostics can help maintenance personnel identify problems more quickly.

Typical diagnostic conditions include:

• Overcurrent
• Overvoltage
• Undervoltage
• Motor overload
• Ground fault
• Drive overtemperature
• Communication faults
• Configuration errors

This can reduce troubleshooting time.

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21. Technical Advantages Summary

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22. Mechanical Specifications

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23. Environmental Considerations

Actual allowable operating conditions depend on the installation environment, load and required drive performance.

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24. Control Functions

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25. Cabinet Installation

The IP20/IP00 open construction means that the drive should normally be mounted inside an appropriate electrical cabinet.

The cabinet should allow sufficient room for:

• Power wiring
• Control wiring
• Network wiring
• Grounding
• Air circulation
• Heat dissipation
• Maintenance
• Component replacement

The drive itself occupies approximately:

454 mm × 190 mm × 212 mm

The actual cabinet should be larger than the drive dimensions.

Adequate spacing is particularly important around ventilation areas.

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26. Thermal Management

The drive generates heat during operation.

A properly designed cabinet should therefore account for the drive’s heat dissipation as well as heat from other electrical components.

Potential heat sources include:

• AC drives
• Power supplies
• Contactors
• Transformers
• Braking equipment
• PLC systems
• Other power electronics

Poor thermal management can cause unnecessary temperature rise and reduce equipment reliability.

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27. Maintenance Benefits

The drive’s diagnostic functions can make maintenance more systematic.

A technician can examine drive status before physically inspecting every part of the machine.

This can help determine whether the problem is related to:

• Motor overload
• Excessive current
• DC bus voltage
• Ground fault
• Communication
• Temperature
• External control signals
• Drive configuration

This is particularly useful for production machinery where unexpected downtime can be costly.

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28. Energy-Saving Potential

A variable frequency drive can provide energy-saving opportunities in appropriate applications.

The greatest potential is often found in variable-torque loads such as:

• Pumps
• Fans
• Blowers

For these applications, reducing motor speed can reduce the mechanical power required.

Actual savings depend on:

• Motor efficiency
• Pump or fan characteristics
• Operating hours
• Required speed
• Load profile
• Mechanical efficiency

Therefore, the drive provides an opportunity for energy optimization, but the actual energy reduction must be evaluated according to the machine.

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29. Recommended Five Same-Series or Closely Related Models

The following models are useful for comparing nearby PowerFlex 755 configurations.

For an actual replacement, the motor’s nameplate current and duty requirements should take priority over horsepower comparison.

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30. Same-Series Comparison

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31. Five Same-Brand Popular Models

The following models represent useful comparison choices from the same brand across different drive capacities and series.

These models are not all direct replacements.

They represent different drive sizes and product positions and should be selected according to the requirements of the specific machine.

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32. PowerFlex 525 and PowerFlex 755 Comparison

For smaller machines, a PowerFlex 525-class drive can be a practical solution.

For more demanding applications requiring greater expansion, feedback capability and system integration, the PowerFlex 755 platform is generally more appropriate.

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33. Conveyor Application

The 20G11ND040JA0NNNNN is well suited to medium-power conveyor systems.

A conveyor motor may need to operate at different speeds depending on the production process.

The drive can provide:

• Smooth startup
• Controlled acceleration
• Adjustable running speed
• Controlled stopping
• Forward/reverse operation
• Network control
• Fault monitoring

The result is a conveyor system that can respond to changing production requirements without repeatedly starting and stopping the motor at full line speed.

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34. Pump Application

A pump driven by the 20G11ND040JA0NNNNN can operate at different speeds according to process requirements.

For example, a control system can adjust the motor speed in response to:

• Pressure
• Flow
• Temperature
• Tank level
• Production demand

This can improve process control and may also provide energy-saving opportunities.

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35. Fan and Blower Application

Fans and blowers often do not need to run at full speed continuously.

The drive can regulate speed to match actual airflow requirements.

This is useful for:

• Factory ventilation
• Exhaust systems
• Cooling equipment
• Air-handling machinery
• Industrial ventilation

Variable-speed operation can provide more precise airflow control than simple on/off operation.

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36. Mixer Application

Mixing machinery can have significantly different torque requirements during startup and operation.

The drive can provide a controlled acceleration profile.

Once the mixer reaches operating speed, the drive can maintain the required speed according to the programmed reference.

For demanding mixer applications, the 34 A heavy-duty rating should be compared carefully with the motor’s actual full-load current.

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37. Material-Handling Application

Material-handling equipment can benefit from the combination of speed control and dynamic braking.

For example, a loaded conveyor may need to slow down quickly at a transfer point.

The drive can provide controlled deceleration rather than relying on an uncontrolled motor stop.

This can reduce mechanical shock and improve machine behavior.

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38. Networked Automation Application

The embedded EtherNet/IP interface allows the drive to be integrated into an industrial control network.

A typical system could include:

• Controller
• HMI
• Multiple AC drives
• Remote I/O
• Sensors
• Motor control equipment

The drive can receive commands from the controller and return status information.

This makes it possible to create a more centralized and coordinated machine-control system.

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39. Product Advantages in Practical Use

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40. Complete Technical Parameter Table

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41. Selection Recommendations

If the motor is around 20 HP, the smaller 27 A configuration may be worth considering when its current rating is sufficient.

If the application requires around 30 HP normal-duty capacity, the 20G11ND040JA0NNNNN becomes a more appropriate choice.

If the application is a demanding heavy-load application, the 25 HP heavy-duty rating should be used as the reference rather than the 30 HP normal-duty rating.

For applications above this range, a higher-current PowerFlex 755 configuration should be evaluated.

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42. Advantages Compared With a Basic AC Drive

The main difference is not simply horsepower.

A basic drive may provide speed adjustment, but a PowerFlex 755-class drive is intended for more integrated industrial applications.

The 20G11ND040JA0NNNNN offers:

• Higher-level motor-control functions
• Integrated industrial networking
• Expansion capability
• Feedback options
• Dynamic braking capability
• Diagnostic information
• Flexible parameter configuration
• Multiple control strategies

This makes it suitable for machines that may need to become part of a larger automation system.

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43. Overall Assessment

The 20G11ND040JA0NNNNN is a 480 VAC, three-phase, 40 A PowerFlex 755 AC drive with a 30 HP normal-duty rating and a 25 HP heavy-duty rating.

Its Frame 3 construction provides a relatively compact solution for this power class, with approximate physical dimensions of 454 mm × 190 mm × 212 mm and a product weight of approximately 11.5 kg.

The combination of embedded EtherNet/IP, forced-air cooling, dynamic-braking transistor, EMC filtering, AC input with precharge, and modular expansion capability makes it suitable for a wide range of industrial automation applications.

It is particularly suitable for:

• Conveyors
• Pumps
• Fans
• Blowers
• Mixers
• Material-handling systems
• Packaging equipment
• Process machinery
• General industrial motor applications
• Machines requiring networked motor control

Its strongest practical advantages are its 40 A current capability, 30 HP normal-duty rating, 25 HP heavy-duty rating, industrial Ethernet communication, dynamic braking and expandable architecture.

For final engineering selection, the most important factors are the motor’s nameplate voltage, full-load current, duty classification, overload requirement, acceleration and deceleration requirements, braking requirements, ambient temperature, altitude, enclosure conditions and communication requirements.

In summary, 20G11ND040JA0NNNNN is a strong choice when a medium-power industrial motor needs more than simple speed control and the machine benefits from a networked, expandable and diagnostically capable drive platform.