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20G11ND027JA0NNNNN — Detailed Product Introduction, Specifications, Applications and Advantages

1. Product Overview

The 20G11ND027JA0NNNNN is an industrial AC variable frequency drive from the PowerFlex 755 series.

It is designed for three-phase motor speed and torque control in industrial automation systems. This particular configuration is intended for 480 VAC, three-phase input, with a 27 A normal-duty rating and a 22 A heavy-duty rating.

The drive is rated at approximately 20 HP for normal-duty applications and 15 HP for heavy-duty applications.

It uses a Frame 3 mechanical construction, forced-air cooling, an open IP20/IP00 enclosure arrangement, integrated EtherNet/IP communication, an internal dynamic-braking transistor and an EMC-filtered configuration with the CM jumper installed.

The combination of relatively high motor-control capability, network connectivity, braking capability and modular expansion makes this model suitable for industrial machinery where a simple basic inverter is not sufficient.

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2. Basic Product Information

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3. Brand

The brand of the product is Allen-Bradley.

The model is part of a broad industrial automation product family designed for applications involving motor control, machine automation, process control and industrial communications.

For this particular product, the brand is important mainly because the drive is designed around an industrial automation architecture rather than being a standalone basic speed controller.

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4. Product Series

The 20G11ND027JA0NNNNN belongs to the:

PowerFlex 755 Series

The PowerFlex 755 is an advanced industrial AC drive platform intended for applications that require flexible motor control and integration with automation systems.

Compared with simpler variable frequency drives, the PowerFlex 755 platform provides a broader range of control, communication, diagnostics, feedback and expansion possibilities.

Typical functions associated with this platform include:

• Adjustable motor speed
• Torque control
• Vector motor control
• V/Hz control
• Sensorless vector control
• Encoder-based feedback
• Industrial Ethernet communication
• Dynamic braking
• Drive diagnostics
• Application monitoring
• Safety-related options
• Additional I/O
• Communication expansion

This makes the series suitable for machinery ranging from general-purpose conveyors and pumps to more demanding production equipment.

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5. Model Number

The complete catalog number is:

20G11ND027JA0NNNNN

The catalog number identifies the electrical and mechanical configuration of the drive.

The most important portions for basic drive selection are the D voltage designation and 027 current designation.

The D configuration corresponds to the 480 VAC class, while 027 identifies the 27 A normal-duty current class.

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6. Electrical Specifications

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7. Normal-Duty Rating

The normal-duty rating is:

27 A / 20 HP / approximately 15 kW

This makes the drive appropriate for many medium-sized industrial motors operating under normal-duty conditions.

Normal-duty applications generally include equipment where the motor does not continuously experience severe overload or repeated high-torque acceleration.

Examples include:

• Centrifugal pumps
• Fans
• Blowers
• Conveyors
• General material-handling equipment
• Process machinery
• Air-handling equipment
• General-purpose industrial motors

The actual motor nameplate current should always be compared with the drive’s rated output current before final selection.

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8. Heavy-Duty Rating

The heavy-duty rating is:

22 A / 15 HP / approximately 11 kW

Heavy-duty operation is intended for applications where the motor experiences more demanding loading or higher overload requirements.

Examples may include:

• High-load conveyors
• Mixers
• Material-handling machines
• Machinery with frequent acceleration
• Machinery with frequent deceleration
• Applications with higher starting torque

The distinction between normal duty and heavy duty is important when selecting the drive.

A 15 HP motor, for example, may be appropriate under heavy-duty conditions, while a larger motor can potentially be supported under normal-duty conditions if its actual current and operating characteristics remain within the specified limits.

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9. Dimensions

The Frame 3 physical dimensions are approximately:

454 mm × 190 mm × 212 mm

The dimensions are normally expressed as:

Height × Width × Depth

These are product dimensions rather than recommended cabinet dimensions.

A control cabinet must normally provide additional space for:

• Power cables
• Control cables
• Network cables
• Grounding connections
• Ventilation
• Heat dissipation
• Service access
• Wiring bends
• Maintenance

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10. Weight

The approximate product weight is:

11 kg

The actual shipping weight will normally be greater because of packaging materials.

If additional option cards or accessories are installed, the final installed weight can also differ.

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11. Enclosure and Protection

The drive uses an:

IP20/IP00 — NEMA/UL Open Type

This means the drive is not intended to be treated as a fully sealed industrial enclosure.

It should normally be installed inside an appropriate electrical cabinet or protected control enclosure.

The cabinet should protect the drive from:

• Excessive dust
• Moisture
• Water spray
• Corrosive gases
• Conductive contamination
• Mechanical impact

The enclosure rating of the complete installation will therefore depend on the cabinet and the installation environment, not simply on the drive itself.

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12. Cooling System

The 20G11ND027JA0NNNNN uses forced-air cooling.

The cooling system moves air through the drive’s heat-generating components to maintain acceptable operating temperatures.

This is important because variable frequency drives generate heat during operation.

Proper cabinet design should therefore take into account:

• Drive losses
• Ambient temperature
• Cabinet temperature
• Air circulation
• Fan operation
• Installation spacing
• Other heat-generating equipment

A drive should not simply be installed into a tightly enclosed cabinet without considering thermal management.

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13. Integrated EtherNet/IP

One of the major advantages of this model is the integrated EtherNet/IP interface.

The drive can communicate with a larger industrial control system through the network.

Typical information that can be exchanged includes:

This can reduce the amount of hardwired control wiring required in an automated machine.

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14. Dynamic Braking

The model includes an:

Internal Dynamic-Braking Transistor

Dynamic braking is useful when the machine needs to decelerate quickly.

During motor deceleration, mechanical energy can be transferred back into the drive’s DC bus.

A braking resistor can be used to dissipate this energy when the application requires it.

This feature is useful for:

• High-inertia conveyors
• Material-handling machinery
• Mixers
• Rapid-stop applications
• Rotating machinery
• Machinery requiring short deceleration times

The internal transistor does not mean that every application automatically includes a complete braking resistor system.

The resistor and braking capacity must be selected according to the actual machine requirements.

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15. EMC Filtering

The catalog configuration includes:

Filtered, CM jumper installed

The filtering arrangement helps manage certain electrical noise associated with variable frequency drive operation.

Good EMC performance still depends on the complete installation.

Important factors include:

• Motor cable length
• Cable shielding
• Grounding
• Cabinet construction
• Cable routing
• Separation of power and control wiring
• Correct termination
• Motor grounding

The built-in filtering should therefore be considered part of a complete EMC installation strategy.

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16. Motor-Control Functions

The PowerFlex 755 platform is designed for advanced AC motor control.

Depending on configuration, application and installed options, the platform can support several motor-control methods.

V/Hz Control

This is appropriate for relatively straightforward variable-speed applications.

Typical applications include:

• Fans
• Pumps
• Blowers
• Simple conveyors

Sensorless Vector Control

Sensorless vector control provides improved speed and torque performance compared with basic V/Hz operation.

It is useful where the motor experiences changing loads.

Flux Vector Control

Flux vector control can provide more advanced torque and speed control.

It is useful in applications where motor performance is more demanding.

Encoder-Based Control

Where feedback is required, suitable feedback modules can be added.

This can improve speed regulation and provide more precise control for specialized machinery.

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17. Product Introduction

The 20G11ND027JA0NNNNN is a medium-power industrial AC drive intended to regulate three-phase AC motors.

Instead of running a motor directly from a fixed-frequency electrical supply, the drive controls the voltage and frequency supplied to the motor.

This provides several important benefits.

The motor can accelerate gradually rather than starting abruptly.

The operating speed can be changed according to the production process.

The motor can be stopped using a controlled deceleration profile.

The drive can also report operating conditions and faults to the automation controller.

For a modern production line, this means the motor is not simply an independent piece of electrical equipment.

It can become part of the complete machine-control architecture.

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18. Main Applications

Conveyor Systems

Conveyor systems are one of the most common applications for variable frequency drives.

The drive can control conveyor speed according to production requirements.

Smooth acceleration can reduce mechanical stress on:

• Belts
• Gearboxes
• Couplings
• Shafts
• Rollers

The integrated network interface also allows conveyor speed and status to be coordinated with other machinery.

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Pumps

The drive can control industrial pumps where variable flow or pressure is required.

Typical applications include:

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

The ability to adjust motor speed can provide much better process flexibility than simply switching a fixed-speed motor on and off.

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Fans

Industrial fans often operate under varying airflow requirements.

The drive allows motor speed to be adjusted according to actual demand.

Applications include:

• Factory ventilation
• Exhaust systems
• Cooling systems
• Air-handling equipment
• Process ventilation

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Blowers

Blower systems may require different airflow levels during different stages of a process.

Variable-speed operation allows the blower motor to operate at the appropriate speed instead of remaining continuously at maximum speed.

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Mixers

Mixers can experience changing torque requirements.

The drive can provide controlled acceleration and adjustable running speed.

For heavy mixers, however, the heavy-duty current rating must be checked carefully.

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Material Handling

Material-handling systems often benefit from controlled acceleration and deceleration.

This can reduce sudden mechanical loading and improve the movement of products.

The drive is suitable for many applications such as:

• Conveyors
• Transfer systems
• Roller systems
• Processing lines
• Packaging systems

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19. Application Advantages

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20. Main Product Advantages

20.1 20 HP Normal-Duty Capacity

The 20 HP normal-duty rating makes the drive suitable for medium-sized industrial motors.

It occupies a useful position between smaller drive configurations and larger high-power models.

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20.2 15 HP Heavy-Duty Capacity

The 15 HP heavy-duty rating provides flexibility for applications where the motor experiences greater loading.

This makes the drive more versatile than a drive designed solely for light-duty operation.

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20.3 27 A Current Rating

The 27 A output rating provides a practical basis for selecting the drive according to motor nameplate current.

Current should always be checked in addition to horsepower.

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20.4 Integrated EtherNet/IP

The integrated industrial Ethernet interface is one of the strongest advantages of this configuration.

It can simplify communication between:

• PLCs
• HMIs
• Drives
• Remote I/O
• Supervisory systems
• Other industrial equipment

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20.5 Internal Dynamic Braking

The internal braking transistor allows the drive to support applications requiring controlled deceleration with an appropriate braking resistor arrangement.

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20.6 Modular Architecture

The PowerFlex 755 platform supports additional option modules.

Depending on the application, additional functions can include:

• Encoder feedback
• Universal feedback
• Additional communications
• I/O
• Safety functions
• Application-specific functions

This gives the drive greater expansion capability.

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20.7 Advanced Diagnostics

Drive status and diagnostic information can help maintenance personnel identify operating problems.

Potential diagnostic areas include:

• Overcurrent
• Overvoltage
• Undervoltage
• Motor overload
• Ground fault
• Drive temperature
• Communication errors
• Configuration problems

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21. Technical Advantages Summary

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22. Physical and Mechanical Specifications

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23. Environmental Considerations

Environmental performance depends strongly on the complete installation.

High ambient temperature, restricted airflow, high altitude and heavy continuous loading can affect the usable drive capacity.

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24. Control and Communication

The drive is particularly useful in automated systems where motor control needs to be coordinated with a controller.

For example, an automated conveyor can receive a speed command from the controller.

The drive can then return operating information such as current speed, output current and fault status.

This two-way communication can make machine operation easier to monitor.

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25. Cabinet Installation

Because the drive is an open-type IP20/IP00 product, it is normally installed inside a suitable electrical cabinet.

The cabinet should provide enough space around the drive for:

• Airflow
• Heat removal
• Wiring
• Maintenance
• Network connections
• Power connections
• Grounding
• Safe access

The drive’s basic physical envelope is approximately:

454 mm high × 190 mm wide × 212 mm deep

The actual cabinet should be larger than these dimensions.

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26. Thermal Management

Thermal management is important for a Frame 3 drive.

Heat generated by the drive must be removed from the cabinet.

A cabinet containing several drives may require additional cooling or ventilation.

The designer should consider the combined heat generated by:

• Drives
• Power supplies
• Contactors
• Transformers
• Braking components
• PLC equipment
• Other electrical devices

Good cabinet thermal design can improve equipment reliability and reduce unnecessary thermal stress.

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27. Maintenance Advantages

The drive provides information that can help technicians troubleshoot equipment.

Instead of checking every component manually, maintenance personnel can first examine drive status and fault information.

This can help identify whether a problem is associated with:

• Motor overload
• Excessive current
• DC bus voltage
• Ground fault
• Communication
• Drive temperature
• Configuration
• External control signals

This makes the drive suitable for machines where reducing maintenance downtime is important.

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28. Energy Management

Variable frequency drives can provide energy-saving opportunities in suitable applications.

The biggest potential benefits are often seen in variable-torque loads such as:

• Pumps
• Fans
• Blowers

For these machines, operating at reduced speed can significantly reduce the mechanical power required.

The actual energy saving depends on:

• Motor efficiency
• Load characteristics
• Operating hours
• Speed profile
• Process requirements
• Mechanical efficiency

Therefore, the drive should be viewed as an important energy-management tool rather than a guarantee of a particular percentage of savings.

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29. Five Same-Series or Closely Related Models

The following models are useful comparison choices within the PowerFlex 755 family and nearby power ratings.

These models are comparison choices rather than automatic replacement recommendations.

The actual replacement should be selected according to motor current, duty cycle, voltage, overload requirement, braking requirement, enclosure, communication and physical installation.

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30. Same-Series Comparison

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31. Five Same-Brand Popular Models

The following are useful models to consider when comparing different drive sizes and product positions.

These are not all direct substitutes.

They represent different positions in the drive family and should be selected according to the machine’s electrical and functional requirements.

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32. PowerFlex 525 vs. PowerFlex 755

The PowerFlex 525 is generally a more compact solution for smaller and medium-sized machinery.

The PowerFlex 755 is aimed at applications where more advanced motor-control capability, modular expansion and system integration are required.

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33. Recommended Application Selection

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34. Conveyor Application Example

Consider a conveyor driven by a 15–20 HP three-phase motor.

A direct-on-line starter would typically start the motor at full line frequency.

With the 20G11ND027JA0NNNNN, the motor can accelerate using a programmed ramp.

This can reduce the mechanical shock experienced by the conveyor system.

The drive can also operate the conveyor at different speeds.

For example:

• Slow speed during loading
• Normal speed during transportation
• Reduced speed during inspection
• Controlled stopping at the end of the line

Through EtherNet/IP, these commands can be integrated into a larger machine-control program.

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35. Pump Application Example

A pump does not necessarily need to operate at maximum speed continuously.

The drive can adjust motor speed according to the required process condition.

For example, if the required flow decreases, the drive can reduce motor speed.

This can improve process control and may reduce energy consumption.

The drive can also provide operating information to the control system.

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36. Fan and Blower Application

Fans and blowers are particularly suitable for variable-speed operation.

The drive can regulate speed based on:

• Airflow demand
• Pressure
• Temperature
• Production requirements
• Ventilation requirements

This provides greater flexibility than fixed-speed operation.

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37. Mixer Application

A mixer can have a relatively high torque requirement during startup.

Once the material begins moving, the torque requirement may change.

The drive can provide a controlled acceleration profile.

For applications with frequent high-load starting or repeated overload, the heavy-duty rating of 22 A / 15 HP should be evaluated carefully against the actual motor nameplate current.

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38. Material-Handling Application

Material-handling machinery often requires frequent speed changes.

The drive can provide:

• Adjustable speed
• Controlled acceleration
• Controlled deceleration
• Forward/reverse control
• Networked commands
• Fault diagnostics

This makes the drive suitable for many automated material-handling systems.

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39. Product Advantages in Practical Use

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40. Installation and Selection Notes

Before installing the 20G11ND027JA0NNNNN, several parameters should be checked.

Motor Voltage

The motor should be compatible with the drive’s output voltage and the available supply configuration.

Motor Current

The motor nameplate current is one of the most important selection parameters.

Duty

Determine whether the application should be treated as normal duty or heavy duty.

Acceleration

Large mechanical loads may require additional acceleration time.

Deceleration

High-inertia applications may require dynamic braking.

Environment

Ambient temperature, altitude, humidity and contamination should be considered.

Cabinet

The drive’s IP20/IP00 open construction requires suitable enclosure protection.

Communication

If EtherNet/IP is used, network architecture and addressing should be planned during system design.

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41. Complete Parameter Table

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42. Five Closely Related Models — Quick Selection Table

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43. Five Same-Brand Models — Quick Comparison

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44. Overall Product Evaluation

The 20G11ND027JA0NNNNN is a strong medium-power industrial drive for applications where both motor-control capability and automation-system integration are important.

Its principal electrical rating is 27 A normal duty / 20 HP and 22 A heavy duty / 15 HP at the 480 VAC three-phase voltage class.

Its Frame 3 construction gives it a physical size of approximately 454 mm high, 190 mm wide and 212 mm deep, with an approximate product weight of 11 kg.

The integrated EtherNet/IP interface is a major advantage for modern automated machinery because it allows the drive to exchange control and diagnostic information with the machine-control system.

The internal dynamic-braking transistor gives the drive additional flexibility in applications where controlled deceleration is important.

The filtered configuration with the CM jumper installed is also useful in industrial electrical systems where electromagnetic compatibility needs to be considered.

The modular PowerFlex 755 architecture allows the basic drive to be expanded with suitable feedback, I/O, communication and safety options when the application requires additional functionality.

For conveyors, pumps, fans, blowers, material-handling systems, mixers and general process machinery, this model provides a useful combination of power, control, communication and mechanical flexibility.

The most important point when selecting this drive is not simply the motor horsepower.

The final selection should be based on the motor’s nameplate current, voltage, duty classification, overload requirement, acceleration/deceleration profile, braking requirement, ambient conditions, installation altitude, cabinet conditions and required communication or safety functions.

In short, the 20G11ND027JA0NNNNN is best viewed as a 480 V, 27 A, 20 HP normal-duty, 15 HP heavy-duty, Frame 3 PowerFlex 755 industrial AC drive, with integrated EtherNet/IP, forced-air cooling, EMC filtering and an internal dynamic-braking transistor.

It is particularly well suited to medium-power industrial machinery that needs more than basic variable-speed control and benefits from integration into a networked automation system.