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Allen-Bradley 20G1ALD485AN2NNNNN PowerFlex 755 AC Drive

1. Product Overview

The Allen-Bradley 20G1ALD485AN2NNNNN is a high-power PowerFlex 755 AC drive designed for demanding industrial motor-control applications.

It is a 480 VAC, three-phase, air-cooled variable-frequency drive with a rated output current of 485 A. The unit belongs to the PowerFlex 755 family and uses a Frame 8, 800 mm deep MCC-style construction.

The drive is configured for AC input with precharge and does not use DC input terminals. It incorporates embedded EtherNet/IP communication, making it suitable for industrial automation systems where the drive needs to exchange commands, status information, operating data, and diagnostic information with a control system.

The specified model is equipped with an enhanced LCD full-numeric HIM, providing a local operator interface for setup, monitoring, parameter adjustment, fault investigation, and manual operation.

The model is also configured with EMC filtering and a removed CM jumper configuration. This configuration is particularly relevant when the drive is installed as part of a larger industrial electrical system where grounding, EMC behavior, and system-level electrical compatibility must be considered carefully.

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2. Basic Product Information

Item	Specification
Brand	Allen-Bradley
Product Series	PowerFlex 755
Product Type	AC Variable Frequency Drive
Catalog Number	20G1ALD485AN2NNNNN
Drive Family	PowerFlex 750-Series
Cooling Method	Forced Air / Air Cooled
Input Type	AC Input with Precharge
DC Input Terminals	None
Voltage Class	480 VAC
Input Configuration	Three Phase
Rated Output Current	485 A
Frame Size	Frame 8
Enclosure Style	Type 1 / IP20
Mechanical Construction	800 mm Deep MCC Style
Communication	Embedded EtherNet/IP
EMC Configuration	Filtered
CM Jumper	Removed
Dynamic Braking	None
Operator Interface	Enhanced LCD Full Numeric HIM
Local Operation	Supported through HIM
Application Category	Industrial AC Motor Control
Cooling Structure	Forced-Air Cooling
Mounting Class	Large Industrial / MCC-Style Drive

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3. Main Technical Parameters

The following table summarizes the principal technical characteristics of the 20G1ALD485AN2NNNNN.

Parameter	Specification
Model	20G1ALD485AN2NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Drive Type	AC Drive / Variable Frequency Drive
Rated Voltage	480 VAC
Phase	3 Phase
Rated Current	485 A
Frame	Frame 8
Duty Rating	Light Duty / Normal Duty / Heavy Duty
Light-Duty Motor Rating	450 HP
Normal-Duty Motor Rating	400 HP
Heavy-Duty Motor Rating	350 HP
Input Type	AC Input with Precharge
DC Terminals	No DC Terminals
Cooling	Forced Air
Enclosure	Type 1
Protection Rating	IP20
Mechanical Style	800 mm Deep MCC Style
Communication	Embedded EtherNet/IP
EMC Filter	Filtered
CM Jumper	Removed
Dynamic Braking	None
HIM	Enhanced LCD, Full Numeric
Local Operator Interface	Included
Control Application	Industrial Motor Speed and Torque Control
Typical Motor Class	Large Low-Voltage Industrial Motors
Installation Environment	Industrial Electrical Control Equipment
Dimensions	Large Frame 8 / 800 mm deep MCC-style construction
Depth	800 mm
Width	Configuration-dependent; verify final mechanical drawing
Height	Configuration-dependent; verify final mechanical drawing
Approximate Planning Weight	About 500–650 kg for complete large-frame installation planning; verify final shipping/mechanical data
Weight Unit	kg
Installation Type	Fixed Industrial Installation

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4. Electrical Rating

The 20G1ALD485AN2NNNNN is designed for a 480 VAC three-phase industrial electrical system.

Its 485 A current rating places it in the large-drive category and makes it appropriate for substantial motor loads rather than small machinery or compact automation equipment.

The 480 VAC class is commonly used in large industrial facilities because it allows high motor power to be transferred without requiring extremely large current levels compared with lower-voltage systems.

For system design, the incoming electrical distribution, transformer capacity, disconnecting means, branch protection, conductor sizing, grounding arrangement, short-circuit characteristics, and motor requirements should all be evaluated together.

The drive should not be selected only from the motor horsepower shown on the nameplate. The actual motor full-load current, application duty cycle, overload requirements, acceleration characteristics, ambient conditions, and installation configuration are also important.

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5. Motor Power Capability

One of the most important features of this model is its multi-duty rating.

The 20G1ALD485AN2NNNNN is associated with the following motor power classifications:

Duty Classification	Motor Rating
Light Duty	450 HP
Normal Duty	400 HP
Heavy Duty	350 HP

The different ratings allow the same drive family to be applied to different types of mechanical loads.

A motor-driven fan or pump with relatively moderate overload requirements can generally be evaluated against the higher light-duty rating.

A general industrial machine with more demanding acceleration and operating conditions can be evaluated using the normal-duty rating.

For applications requiring greater continuous torque and overload capability, the heavy-duty rating is the more appropriate reference.

The actual selection should always be based on the motor current and application duty requirements rather than horsepower alone.

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6. 485 A Output Rating

The 485 A rating is one of the defining characteristics of this model.

A drive with this current capability is intended for large industrial motors and equipment such as pumps, fans, compressors, conveyors, process machinery, large machine tools, material-handling equipment, and other high-power rotating machinery.

At this power level, installation design becomes especially important.

Cable routing, termination quality, grounding, cabinet ventilation, heat dissipation, motor cable length, switching frequency, harmonic considerations, and protection coordination can all have a significant effect on overall system performance.

The 485 A rating also makes this model particularly useful when a machine builder needs a substantial drive without moving immediately into the next larger frame category.

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7. 480 VAC Three-Phase Configuration

The drive is designed for a 480 VAC three-phase power system.

The three-phase configuration makes it suitable for industrial AC motors and large mechanical systems.

The AC input arrangement incorporates precharge circuitry. Precharge is important in large power-conversion equipment because it helps control the initial charging behavior of the drive’s DC-link capacitive system when power is first applied.

This is especially relevant for high-power drives because the energy stored in the DC link is substantially greater than in small fractional-horsepower or compact industrial drives.

The drive does not use external DC input terminals in the specified configuration.

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8. Frame 8 Construction

The 20G1ALD485AN2NNNNN uses Frame 8 construction.

Frame 8 indicates that the drive is part of the large physical and electrical size range within the PowerFlex 755 platform.

Compared with compact drives, a Frame 8 installation requires substantially more attention to:

• Cabinet space
• Airflow
• Heat dissipation
• Cable bending radius
• Power cable termination
• Grounding
• Maintenance access
• Lifting and transportation
• Service clearance
• Mechanical support

Frame 8 equipment is generally intended for permanent industrial installations rather than portable machinery.

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9. 800 mm Deep MCC-Style Construction

The model uses an 800 mm deep MCC-style mechanical configuration.

The 800 mm depth is an important planning parameter because it directly affects the required control-room, electrical-room, MCC, or cabinet footprint.

For installation planning, the depth should not be treated as the only required dimension.

The complete mechanical drawing should be checked for overall height, width, cable entry arrangement, door clearance, mounting requirements, service access, ventilation requirements, and the space needed to safely install and remove the equipment.

For this reason, the 800 mm depth can be treated as a confirmed primary enclosure dimension, while the final overall width and height should be taken from the mechanical configuration being supplied.

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10. Dimensions and Weight

Physical dimensions are particularly important for this model because it is a large Frame 8 drive.

Physical Parameter	Specification
Model	20G1ALD485AN2NNNNN
Frame	Frame 8
Enclosure Depth	800 mm
Construction	MCC Style
Overall Width	Configuration-dependent; verify final mechanical drawing
Overall Height	Configuration-dependent; verify final mechanical drawing
Installation Space	Large industrial electrical-room / MCC space
Service Clearance	Must be provided according to installation requirements
Approximate Planning Weight	500–650 kg
Weight	kg
Final Shipping Weight	Verify equipment-specific shipping documentation
Final Installed Weight	Verify final configuration and mechanical documentation

The 800 mm depth is an important catalog-level characteristic of the selected MCC-style configuration.

The overall width and height can vary according to the complete mechanical arrangement and options. Therefore, for engineering drawings, cabinet fabrication, transportation planning, lifting equipment, and foundation design, the final dimension drawing should be treated as the controlling document.

The approximate 500–650 kg range above is intended only for preliminary equipment-space and handling planning. It should not be used as the final lifting specification.

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11. Embedded EtherNet/IP

The drive incorporates embedded EtherNet/IP communication.

This is a major advantage in modern industrial automation systems because the drive can participate directly in an Ethernet-based control architecture without requiring a separate external communication adapter for basic EtherNet/IP integration.

A networked drive can exchange information such as:

• Start and stop commands
• Speed reference
• Frequency reference
• Output current
• Motor status
• Drive status
• Fault information
• Warning information
• Operating parameters
• Diagnostic information
• Feedback and monitoring data

The exact data structure and control method depend on the automation architecture and configuration.

For larger factories, EtherNet/IP integration can simplify the connection between the drive system and programmable automation controllers, operator interfaces, supervisory systems, and other networked industrial equipment.

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12. Enhanced LCD Full Numeric HIM

The AN2 configuration is equipped with an enhanced LCD full-numeric HIM.

The HIM provides a local interface for drive setup and operation.

This is useful during:

• Initial commissioning
• Motor setup
• Parameter adjustment
• Direction testing
• Speed reference testing
• Fault investigation
• Preventive maintenance
• Troubleshooting
• Local service work
• Machine commissioning

A local operator interface is particularly useful for large industrial drives because technicians can inspect drive conditions directly at the equipment instead of relying entirely on the supervisory control system.

The enhanced LCD interface also provides a practical way to work through parameters and diagnostic information during commissioning.

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13. EMC Filtering and CM Jumper Removed

The specified configuration includes filtering and a removed CM jumper arrangement.

EMC considerations become increasingly important as motor-drive power increases.

A large variable-frequency drive produces high-frequency switching activity as part of its normal operation. The installation therefore needs to be designed with appropriate attention to:

• Grounding
• Shielding
• Cable routing
• Motor cable length
• Separation between power and control wiring
• Cabinet bonding
• Communication cable routing
• Motor-frame grounding
• System-level EMC practices

The CM jumper configuration is part of this overall electrical design.

It should be evaluated together with the grounding arrangement, motor construction, motor cable type, installation environment, and the requirements of the complete electrical system.

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14. Dynamic Braking Configuration

The specified model is configured without an integrated dynamic braking option.

This is an important consideration when selecting the drive for machinery with high regenerative energy.

Applications such as:

• High-inertia machinery
• Rapid deceleration systems
• Hoisting equipment
• Certain conveyors
• Unwinding equipment
• High-speed rotating machinery

may generate substantial regenerative energy during deceleration.

If the application requires rapid stopping or controlled dissipation of regenerative energy, the braking strategy should be evaluated during system design.

The absence of the specified dynamic braking configuration does not mean that the drive cannot be used in systems requiring controlled stopping; it means that the braking arrangement needs to be designed according to the application requirements.

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15. Air-Cooled Design

The 20G1ALD485AN2NNNNN uses forced-air cooling.

Large AC drives generate considerable heat during operation.

The cooling system therefore becomes a critical part of the installation.

The electrical room or cabinet should provide sufficient airflow to prevent excessive heat accumulation.

The installation should also consider:

• Ambient temperature
• Airflow direction
• Cabinet ventilation
• Filter condition
• Fan condition
• Heat dissipation
• Clearance around air passages
• Dust accumulation
• Maintenance accessibility

A clean airflow path is particularly important for large industrial drives because blocked ventilation can increase internal temperature and reduce long-term operating reliability.

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16. Type 1 / IP20 Enclosure

The specified enclosure configuration is Type 1 / IP20.

This type of enclosure is intended for controlled industrial electrical environments.

It is not equivalent to a sealed outdoor enclosure or a washdown-rated enclosure.

Where the drive is installed in an industrial environment with dust, moisture, oil mist, corrosive substances, or frequent washdown activity, the surrounding electrical enclosure and environmental controls need to be considered carefully.

The drive itself should be installed in an environment appropriate for its enclosure classification and the applicable installation requirements.

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17. Typical Applications

The 20G1ALD485AN2NNNNN is suitable for many large industrial motor applications.

Large Pumps

Large water pumps, process pumps, cooling-water pumps, circulation pumps, and industrial pumping systems can use high-power variable-speed drives to control motor speed according to process demand.

Variable-speed operation can also reduce mechanical stress compared with repeated direct-on-line starting.

Fans and Blowers

Large industrial fans and blowers can benefit from variable-speed control.

Instead of operating continuously at full speed, the motor can be controlled according to the actual ventilation or process requirement.

This makes the drive suitable for large air-handling systems, industrial ventilation, process exhaust systems, and other high-power airflow equipment.

Conveyors

Large conveyors often require controlled acceleration and deceleration.

The drive can provide controlled motor speed and help reduce mechanical shock during starting and stopping.

This is useful for bulk-material handling, manufacturing lines, mining-related equipment, logistics systems, and large production conveyors.

Compressors

Large compressors can require accurate speed control and substantial motor power.

The drive can be used where variable-speed compressor operation is compatible with the compressor design and process requirements.

Industrial Processing Equipment

The PowerFlex 755 platform is appropriate for industrial process equipment where motor speed, torque, acceleration, deceleration, and operating status need to be controlled as part of an automated system.

Material Handling

High-power material-handling machines can benefit from controlled acceleration, controlled speed, and integration with a central automation system.

Large Machine Systems

The drive can also be considered for large machine tools, industrial production equipment, large mixers, rotating machinery, and other systems where a conventional fixed-speed motor arrangement does not provide sufficient operational flexibility.

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18. Main Product Advantages

18.1 High Power Capacity

The 485 A output rating allows the drive to control large industrial motors.

This makes it suitable for equipment that is beyond the practical range of compact general-purpose drives.

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18.2 Multiple Duty Ratings

The Light Duty, Normal Duty, and Heavy Duty classifications allow engineers to evaluate the drive according to the actual mechanical load.

This is more useful than relying only on one horsepower number.

Different applications place different demands on motor current and overload capability.

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18.3 Embedded EtherNet/IP

Integrated EtherNet/IP simplifies connection to modern industrial automation networks.

It can reduce the need for additional communication hardware and makes the drive easier to integrate into a networked control architecture.

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18.4 Local HIM Interface

The enhanced LCD full-numeric HIM provides local access to drive parameters, operating conditions, and diagnostic information.

This can be especially valuable during commissioning and maintenance.

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18.5 Large-Frame Industrial Construction

Frame 8 construction provides a platform suitable for large industrial motor-control applications.

The MCC-style construction also fits applications where the drive is installed as part of a larger electrical distribution or motor-control arrangement.

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18.6 Forced-Air Cooling

Forced-air cooling is practical for high-power drive installations where substantial heat must be removed continuously.

Proper ventilation and maintenance remain essential.

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18.7 Precharge Configuration

The AC input with precharge configuration is designed for high-power drive operation and controlled charging of the DC-link system during power-up.

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18.8 EMC-Oriented Configuration

The filtered configuration provides an additional system-level EMC consideration for installations where electrical noise and compatibility need to be controlled.

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18.9 Flexible Industrial Application

The PowerFlex 755 platform is designed for a broad range of industrial motor-control applications.

It can be integrated into systems ranging from standalone machines to networked production lines.

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19. Recommended Same-Series or Closely Related Models

The following five models are closely related PowerFlex 755 configurations and can be considered when selecting an alternative based on current rating, HIM configuration, or motor power requirements.

Model	Series	Voltage	Current	LD Rating	ND Rating	HD Rating	Frame	Cooling	Enclosure / Style	HIM
20G1ALD485AN0NNNNN	PowerFlex 755	480 VAC	485 A	450 HP	400 HP	350 HP	8	Air Cooled	Type 1/IP20, 800 mm MCC	No HIM
20G1ALD485JN0NNNNN	PowerFlex 755	480 VAC	485 A	450 HP	400 HP	350 HP	8	Air Cooled	Type 1/IP20, 800 mm MCC	HIM configuration
20G1ALD485JN2NNNNN	PowerFlex 755	480 VAC	485 A	450 HP	400 HP	350 HP	8	Air Cooled	Type 1/IP20, 800 mm MCC	Enhanced LCD / Numeric HIM
20G1ALD485JN4NNNNN	PowerFlex 755	480 VAC	485 A	450 HP	400 HP	350 HP	8	Air Cooled	Type 1/IP20, 800 mm MCC	Enhanced LCD / Numeric HIM
20G1ALD545AN0NNNNN	PowerFlex 755	480 VAC	545 A	500 HP	450 HP	350 HP	8	Air Cooled	Type 1/IP20, 800 mm MCC	No HIM

These models are useful for comparison because several maintain the same 480 VAC, 485 A electrical class while changing the operator-interface configuration.

The 545 A model moves to a higher current capacity and is useful when the motor or application requires additional current capability.

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20. Detailed Comparison of Related Models

Model	Main Difference	Rated Current	LD	ND	HD	Depth	Approx. Planning Weight
20G1ALD485AN0NNNNN	No-HIM configuration	485 A	450 HP	400 HP	350 HP	800 mm	500–650 kg
20G1ALD485JN0NNNNN	Alternative HIM/configuration code	485 A	450 HP	400 HP	350 HP	800 mm	500–650 kg
20G1ALD485JN2NNNNN	Enhanced LCD full-numeric HIM configuration	485 A	450 HP	400 HP	350 HP	800 mm	500–650 kg
20G1ALD485JN4NNNNN	Enhanced HIM / alternative operator configuration	485 A	450 HP	400 HP	350 HP	800 mm	500–650 kg
20G1ALD545AN0NNNNN	Higher-current configuration	545 A	500 HP	450 HP	350 HP	800 mm	Configuration-dependent

The weights shown above are preliminary planning values rather than final shipping specifications.

For transportation, lifting, floor loading, and cabinet engineering, the actual supplied configuration should be checked against its final mechanical documentation.

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21. Five Same-Brand Popular Model Families

The following models represent other widely used members of the same Allen-Bradley PowerFlex product family range.

Model	Product Series	Voltage Class	Current / Rating	Frame / Size	Main Application
25B-D010N104	PowerFlex 525	480 VAC Class	Small-drive range	Compact	General machinery, conveyors, pumps, fans
25C-D010N103	PowerFlex 527	480 VAC Class	Small-drive range	Compact	Machine automation and integrated control
20F11NC2P1JA0NNNNN	PowerFlex 753	480 VAC Class	Medium/high-power range	Industrial frame	General industrial machinery
20F11NC8P0JA0NNNNN	PowerFlex 753	480 VAC Class	Higher-power range	Industrial frame	Large industrial motor control
20G1ALD485AN2NNNNN	PowerFlex 755	480 VAC	485 A	Frame 8	Large industrial motor applications

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22. Comparison with Other Product Series

PowerFlex 525

The PowerFlex 525 is aimed primarily at compact machine-level applications.

It is much smaller than the 20G1ALD485AN2NNNNN and is more appropriate when motor power, physical size, and system complexity are relatively modest.

Typical applications include small conveyors, pumps, fans, packaging equipment, machine tools, and general-purpose machinery.

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PowerFlex 527

The PowerFlex 527 is designed for applications that require closer integration with modern machine-control architectures.

It is particularly useful in machine automation environments where controller-based configuration and network integration are important.

Compared with the large Frame 8 PowerFlex 755, it is aimed at a substantially different power range and physical scale.

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PowerFlex 753

The PowerFlex 753 is intended for general industrial applications requiring flexible AC motor control.

It can be used across a broad range of industrial machines and process equipment.

The PowerFlex 755 is generally positioned toward more demanding and more configurable applications where larger motor ratings and advanced control requirements are involved.

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PowerFlex 755

The PowerFlex 755 is the series to which the 20G1ALD485AN2NNNNN belongs.

Its large-frame configurations make it suitable for substantial industrial motor loads.

The 20G1ALD485AN2NNNNN represents a high-power configuration with a 485 A rating, Frame 8 construction, embedded EtherNet/IP, air cooling, and an enhanced local operator interface.

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23. Product Selection Considerations

Selecting a large AC drive should begin with the motor’s actual operating requirements.

The motor nameplate should be reviewed for:

• Rated voltage
• Full-load current
• Rated frequency
• Rated speed
• Motor power
• Service factor
• Insulation characteristics
• Operating duty

The mechanical load should then be analyzed.

Important questions include:

• Is the load constant torque?
• Is the load variable torque?
• Does the machine require high starting torque?
• How frequently does the machine accelerate?
• How frequently does it decelerate?
• Does the machine regenerate energy?
• Is continuous heavy-duty operation required?
• Is rapid stopping required?
• Is precise speed regulation required?
• Is torque control required?

These questions determine whether the drive’s Light Duty, Normal Duty, or Heavy Duty rating is appropriate.

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24. Installation Considerations

Because the 20G1ALD485AN2NNN is a large Frame 8 drive, installation should be treated as a complete engineering task rather than simply a matter of mounting the drive and connecting the motor.

The electrical installation should consider:

• Incoming power
• Branch protection
• Disconnecting equipment
• Grounding
• Motor cable selection
• Motor cable routing
• Control wiring
• Communication wiring
• EMC requirements
• Cabinet ventilation
• Ambient temperature
• Service access
• Maintenance clearance
• Equipment weight
• Floor loading
• Lifting arrangements

The 800 mm deep MCC-style configuration should be incorporated into the initial mechanical layout.

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25. Cable and Motor Connection Considerations

The 485 A current rating means that power conductors and terminations must be appropriately sized for the installation.

Large-current connections require careful attention to:

• Conductor size
• Terminal compatibility
• Torque requirements
• Cable bending radius
• Parallel conductor arrangements where applicable
• Grounding conductors
• Shielding
• Cable separation
• Motor-side termination

Incorrect termination can create additional heating and electrical stress.

For this reason, cable installation should follow the applicable electrical requirements and the drive’s installation instructions.

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26. Grounding and EMC

Grounding is particularly important with variable-frequency drives.

The drive, cabinet, motor frame, cable shields, and associated electrical equipment should form a properly engineered grounding system.

Motor cables should be routed in a manner that minimizes unnecessary coupling into sensitive control and communication circuits.

EtherNet/IP communication cables should also be separated appropriately from high-power switching conductors where necessary.

Good cabinet bonding and proper grounding practices can improve overall electromagnetic compatibility and help reduce unwanted electrical interference.

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27. Maintenance Advantages

The local HIM provides useful maintenance functionality.

A technician can use the interface during service activities to inspect operating information and diagnose drive-related issues.

Typical maintenance activities may include:

• Checking fault history
• Inspecting operating parameters
• Monitoring output current
• Checking drive status
• Reviewing warnings
• Verifying speed reference
• Checking operating frequency
• Inspecting cooling airflow
• Cleaning ventilation paths
• Checking electrical connections

For a large industrial drive, preventive maintenance is particularly important because the equipment is often connected to machinery where unexpected downtime can have significant operational consequences.

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28. Advantages for Centralized Automation

The embedded EtherNet/IP capability allows the drive to become part of a centralized automation architecture.

A typical system can include:

• Controller
• Human-machine interface
• Industrial Ethernet network
• PowerFlex drive
• Motor
• Sensors
• Process equipment
• Supervisory monitoring

The controller can issue operating commands while receiving drive status and diagnostic information.

This type of architecture is especially useful when many drives are installed throughout a production line.

Instead of treating each drive as an isolated device, the drives can become part of a coordinated automation system.

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29. Advantages for Large Industrial Machinery

The combination of high current capability, large-frame construction, network communication, local operator interface, and multi-duty motor ratings makes the model suitable for large industrial machinery.

It can be considered when the application requires:

• High motor power
• Variable speed
• Controlled acceleration
• Controlled deceleration
• Network integration
• Local service access
• Large motor current capacity
• Industrial-duty construction
• Flexible control architecture

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30. No Dynamic Braking Configuration – What It Means

The specified model does not include the dynamic braking configuration.

This should be considered carefully when the machine has a large rotating mass.

For example, a high-inertia machine may continue rotating after the drive reduces the commanded speed.

If the application requires rapid deceleration, the engineering team should calculate the regenerative energy and determine the appropriate stopping strategy.

The braking method should be selected based on:

• Motor power
• Motor inertia
• Load inertia
• Deceleration time
• Number of braking cycles
• Maximum operating speed
• Required stopping performance
• Mechanical brake requirements

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31. Application Examples

Application	Suitability	Typical Reason for Using the Drive
Large Industrial Pump	High	Variable-speed process control
Large Fan	High	Airflow control and motor speed regulation
Large Conveyor	High	Controlled starting and stopping
Industrial Blower	High	Variable-speed airflow control
Large Compressor	Application-dependent	Variable-speed compressor control
Material Handling System	High	Speed and acceleration control
Process Machinery	High	Centralized automation and motor control
Large Mixer	Application-dependent	Torque and speed control
Large Rotating Machine	High	Adjustable speed and controlled operation
Production Line Equipment	High	Networked drive control

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32. Key Benefits at a Glance

Feature	Benefit
485 A Output	Suitable for large industrial motors
480 VAC Three Phase	Compatible with common large industrial power systems
Frame 8	Designed for high-power applications
800 mm MCC Style	Suitable for large electrical-room and MCC installations
Embedded EtherNet/IP	Convenient network integration
Enhanced LCD HIM	Easier local setup and diagnostics
Air Cooling	Practical cooling method for large drives
AC Input with Precharge	Suitable for high-power AC input architecture
No DC Terminals	Simplified configuration for AC-input applications
EMC Filtering	Supports system-level EMC design
Multi-Duty Ratings	Allows selection according to application loading
Type 1 / IP20	Suitable for controlled industrial electrical environments

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33. Recommended Model Based on Application Type

Application Requirement	Model / Configuration to Consider	Main Reason
Same current rating without local HIM	20G1ALD485AN0NNNNN	Simplified configuration
Same current rating with local operator interface	20G1ALD485AN2NNNNN	Enhanced LCD full-numeric HIM
Same current rating with another HIM configuration	20G1ALD485JN2NNNNN	Alternative configuration
Same current rating with enhanced HIM configuration	20G1ALD485JN4NNNNN	Advanced operator-interface configuration
Higher current requirement	20G1ALD545AN0NNNNN	545 A class
Smaller general-purpose machinery	25B-D010N104	Compact PowerFlex 525 platform
Machine-level integrated control	25C-D010N103	PowerFlex 527 platform
General industrial motor control	20F11NC2P1JA0NNNNN	PowerFlex 753 platform
Larger industrial motor control	20F11NC8P0JA0NNNNN	Higher-capacity PowerFlex 753 configuration

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34. Technical Summary

The Allen-Bradley 20G1ALD485AN2NNNNN is a large industrial PowerFlex 755 AC drive configured for 480 VAC three-phase operation.

Its 485 A output rating allows it to serve large motor applications, with nominal duty classifications of 450 HP for Light Duty, 400 HP for Normal Duty, and 350 HP for Heavy Duty.

The unit uses Frame 8 construction and an 800 mm deep MCC-style enclosure.

It is air cooled and designed for AC input with precharge. The configuration does not provide DC input terminals.

Embedded EtherNet/IP makes the drive suitable for modern networked automation systems.

The enhanced LCD full-numeric HIM gives maintenance and commissioning personnel direct local access to drive information and controls.

The filtered configuration and removed CM jumper should be considered as part of the complete EMC and grounding design.

The Type 1 / IP20 enclosure is appropriate for controlled industrial electrical environments but should not be treated as a sealed or washdown enclosure.

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35. Final Product Specification Table

Category	Final Specification
Model	20G1ALD485AN2NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product	PowerFlex 755 AC Drive
Drive Type	Variable Frequency AC Drive
Voltage	480 VAC
Phase	3 Phase
Current	485 A
Light-Duty Rating	450 HP
Normal-Duty Rating	400 HP
Heavy-Duty Rating	350 HP
Frame	Frame 8
Cooling	Forced Air
Input	AC Input with Precharge
DC Terminals	None
Communication	Embedded EtherNet/IP
Enclosure	Type 1 / IP20
Mechanical Style	800 mm Deep MCC Style
EMC	Filtered
CM Jumper	Removed
Dynamic Braking	None
HIM	Enhanced LCD Full Numeric
Local Interface	Included
Main Application	Large Industrial Motor Control
Typical Loads	Pumps, Fans, Conveyors, Compressors, Blowers, Process Machinery
Depth	800 mm
Width	Configuration-dependent
Height	Configuration-dependent
Approximate Planning Weight	500–650 kg
Weight Unit	kg
Installation	Fixed Industrial Installation
Main Strength	High-current, networked industrial motor control

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36. Conclusion

The Allen-Bradley 20G1ALD485AN2NNNNN is a high-capacity PowerFlex 755 AC drive intended for large industrial motor-control applications.

Its 485 A rating, 480 VAC three-phase input class, Frame 8 construction, 800 mm MCC-style depth, forced-air cooling, embedded EtherNet/IP, enhanced LCD full-numeric HIM, and multi-duty motor ratings make it a substantial industrial drive configuration.

The model is particularly relevant to large pumps, fans, conveyors, blowers, process machinery, material-handling systems, and other equipment where conventional small-frame variable-frequency drives are not sufficient.

From an engineering perspective, the most important characteristics are its current capacity, motor duty ratings, large physical frame, network capability, local operator interface, and installation requirements.

For procurement and preliminary equipment selection, the catalog number 20G1ALD485AN2NNNNN identifies the specific configuration.

For final electrical and mechanical engineering, the motor nameplate current, actual load profile, required overload capacity, braking requirements, ambient conditions, cable arrangement, grounding system, cabinet layout, and final mechanical dimensions should all be checked before installation.

The 800 mm depth and approximately 500–650 kg planning weight provide useful initial information for equipment-room layout and handling calculations, but the final supplied mechanical configuration should control all lifting, transportation, floor-loading, and cabinet-design decisions.

Overall, the 20G1ALD485AN2NNNNN represents a large-frame, high-current PowerFlex 755 configuration intended for serious industrial motor-control applications where high power, network integration, local diagnostics, and flexible operating control are important.