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20G1ABD485AN2NNNNN — PowerFlex 755 Air-Cooled AC Drive

1. Product Overview

The 20G1ABD485AN2NNNNN is a high-power industrial AC variable-frequency drive from the Allen-Bradley PowerFlex 755 series.

It is designed for large three-phase AC motors used in demanding industrial applications where high current capacity, variable-speed operation, controlled acceleration and deceleration, motor protection, process control and industrial network communication are required.

This model is rated for 480 VAC, three-phase input and provides a nominal 485 A output-current rating.

Its published motor ratings are approximately 450 HP for Light Duty, 400 HP for Normal Duty and 350 HP for Heavy Duty.

The model is a Frame 8, air-cooled drive with a Type 1 / IP20, 600 mm deep MCC-style enclosure. It uses AC input with precharge and no DC input terminals, incorporates filtering with the CM jumper removed, and provides embedded EtherNet/IP communication.

A major difference between this model and the AN0 version is the operator interface. The AN2 configuration includes an Enhanced LCD, full-numeric, handheld/local HIM, making it more convenient for commissioning, troubleshooting and local maintenance.

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2. Brand and Product Series

Classification	Specification
Brand	Allen-Bradley
Product Family	PowerFlex 750-Series
Product Series	PowerFlex 755
Product Type	Air-Cooled AC Packaged Drive
Model	20G1ABD485AN2NNNNN
Voltage Class	480 VAC
Phase	3 Phase
Output Current	485 A
Cooling	Air Cooled / Forced Air
Frame	Frame 8
Enclosure	Type 1 / IP20
Cabinet Style	600 mm Deep MCC Style
Communication	Embedded EtherNet/IP
Operator Interface	Enhanced LCD, Full Numeric, Handheld/Local HIM
Input Configuration	AC Input with Precharge
DC Input Terminals	None
Filtering	Filtered
CM Jumper	Removed
Dynamic Braking	None

The PowerFlex 755 series is intended for larger industrial motor applications where a conventional compact machine drive is not sufficient.

The platform is particularly well suited to large pumps, fans, conveyors, compressors, blowers, mixers and other process equipment.

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3. Main Technical Parameters

Parameter	Specification
Model	20G1ABD485AN2NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Family	PowerFlex 750-Series
Product Type	AC Packaged Drive
Input Voltage	480 VAC
Input Phase	3 Phase
Output Current	485 A
Light Duty Rating	450 HP
Normal Duty Rating	400 HP
Heavy Duty Rating	350 HP
Approx. Light Duty Power	336 kW
Approx. Normal Duty Power	298 kW
Approx. Heavy Duty Power	261 kW
Voltage Class	480 VAC / 650 VDC
Frame Size	Frame 8
Cooling	Forced Air
Input Type	AC Input with Precharge
DC Input Terminals	None
Dynamic Braking	None
Filtering	EMC / Filtered
CM Jumper	Removed
Communication	Embedded EtherNet/IP
HIM	Enhanced LCD, Full Numeric
HIM Function	Handheld / Local
Enclosure	Type 1 / IP20
Cabinet Style	600 mm Deep MCC Style
Approx. Height	~2100 mm class
Approx. Width	~610 mm class
Approx. Depth	~465 mm drive-envelope class
Approx. Dimensions	~2100 × 610 × 465 mm
Approx. Weight	Approximately 600–623 kg
Installation	Floor / Cabinet / MCC
Main Application	Large Industrial Motor Control

The dimensions and weight should be treated as approximate planning values because the final installation arrangement can change the overall mechanical envelope.

For engineering layout, lifting, transportation and floor-loading calculations, the actual dimensional drawing and shipping configuration should always be checked against the equipment being supplied.

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4. Electrical Ratings

Electrical Parameter	Specification
Model	20G1ABD485AN2NNNNN
Input Voltage	480 VAC
Input Phase	Three Phase
DC Voltage Class	650 VDC
Output Current	485 A
Light Duty Rating	450 HP
Normal Duty Rating	400 HP
Heavy Duty Rating	350 HP
Light Duty Metric Equivalent	~336 kW
Normal Duty Metric Equivalent	~298 kW
Heavy Duty Metric Equivalent	~261 kW
Input Frequency	50/60 Hz class
Input Type	AC with Precharge
DC Input Terminals	None
Dynamic Braking	None
Filtering	Filtered
CM Configuration	CM Jumper Removed
Cooling	Air Cooled
Frame	8
Communication	Embedded EtherNet/IP

The 485 A rating places this drive firmly in the high-power industrial category.

When selecting the drive for an actual motor, the motor’s rated current, overload requirement, acceleration torque, duty cycle and process load profile should be evaluated rather than selecting only by horsepower.

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5. Duty Ratings

The drive has three important application ratings.

Duty Type	Rating	Approx. Metric Equivalent	Typical Application
Light Duty	450 HP	~336 kW	Variable-torque loads
Normal Duty	400 HP	~298 kW	General industrial loads
Heavy Duty	350 HP	~261 kW	High-torque loads

The distinction between these ratings is important.

A centrifugal fan or pump may operate under a variable-torque load and can potentially use the higher Light Duty rating.

A conveyor, mixer or other mechanically demanding load may require the lower Heavy Duty rating because the motor needs greater overload capability.

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6. Product Configuration

The catalog number identifies a specific combination of drive characteristics.

Configuration	Specification
Model	20G1ABD485AN2NNNNN
Drive Type	PowerFlex 755 AC Packaged Drive
Cooling	Air Cooled
Voltage	480 VAC
Phase	3 Phase
Current	485 A
Frame	8
Enclosure	Type 1 / IP20
Cabinet Depth	600 mm MCC Style
Input	AC Input with Precharge
DC Terminals	None
Filtering	Filtered
CM Jumper	Removed
Dynamic Braking	None
HIM	Enhanced LCD
HIM Format	Full Numeric
HIM Installation	Handheld / Local
Communication	Embedded EtherNet/IP

This configuration is particularly useful when the drive needs to support both centralized automation and direct access by maintenance personnel.

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7. Enhanced LCD HIM

One of the most useful features of the AN2 configuration is its Enhanced LCD HIM.

Unlike a no-HIM configuration, the operator or technician can interact directly with the drive.

Typical tasks include:

• Parameter setup
• Drive commissioning
• Local start and stop
• Speed reference adjustment
• Fault identification
• Alarm review
• Drive-status monitoring
• Troubleshooting
• Parameter verification
• Maintenance checks

This can reduce the need for a technician to connect a separate computer simply to perform basic service operations.

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8. Local and Remote Control

The model is well suited to a mixed-control architecture.

A typical installation can use the HIM for commissioning and maintenance while the PLC uses EtherNet/IP during normal production.

Control Function	Local HIM	EtherNet/IP
Parameter Configuration	Yes	Yes
Start / Stop	Yes	Yes
Speed Reference	Yes	Yes
Direction	Yes	Yes
Status Monitoring	Yes	Yes
Fault Monitoring	Yes	Yes
Alarm Monitoring	Yes	Yes
Commissioning	Excellent	Excellent
Maintenance	Excellent	Excellent
Centralized Automation	Limited	Excellent

This combination makes the AN2 configuration more flexible for service-intensive installations than a completely headless drive configuration.

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9. Embedded EtherNet/IP

Embedded EtherNet/IP is another important characteristic of the model.

The drive can be integrated into an industrial control network so that the automation system can exchange commands, references, status information and diagnostic data with the drive.

Typical communication functions include:

• Start command
• Stop command
• Speed reference
• Frequency reference
• Direction
• Drive status
• Output current
• Operating frequency
• Fault codes
• Alarm conditions
• Process information
• Parameter information

This makes the drive suitable for centralized motor-control architectures.

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10. Product Introduction

The 20G1ABD485AN2NNNNN is designed for large AC motors that need controlled variable-speed operation.

A conventional fixed-speed motor generally operates at a limited number of operating states.

A variable-frequency drive allows the motor speed to be adjusted according to the process requirement.

For a pump, the drive can adjust speed to match required flow.

For a fan, it can regulate airflow.

For a conveyor, it can adjust material speed.

For a mixer, it can control operating speed according to the production process.

For large industrial equipment, these capabilities can improve process control and reduce unnecessary mechanical and electrical stress.

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11. Large Motor Control

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

It is suitable for applications where smaller compact drives would not provide enough current capacity.

The Frame 8 architecture is designed for large equipment installations and is normally found in dedicated electrical rooms, MCC areas, process-control rooms or large industrial cabinets.

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12. Typical Applications

Application	Typical Equipment	Suitability
Water Treatment	Large Pumps	Excellent
Wastewater	Pumps / Blowers	Excellent
Cooling Water	Large Pumps	Excellent
Industrial Ventilation	Large Fans	Excellent
Dust Collection	Large Fans	Excellent
Mining	Conveyors / Pumps	Excellent
Cement	Fans / Conveyors	Excellent
Steel	Fans / Pumps	Excellent
Material Handling	Large Conveyors	Excellent
Chemical Processing	Pumps / Mixers	Excellent
Oil and Gas	Pumps / Fans / Compressors	Good
Manufacturing	Large Process Machinery	Excellent
HVAC	Large Fans / Pumps	Excellent
Process Industry	Large Motors	Excellent

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13. Pump Applications

Large pumps are one of the most practical applications for this drive.

A pump does not always need to run at maximum speed.

By adjusting motor speed, the drive can help match pump output to actual process demand.

Typical applications include:

• Water circulation
• Cooling-water systems
• Raw-water pumping
• Wastewater pumping
• Process-water circulation
• Industrial fluid transfer
• Irrigation systems
• Large building services

The drive can also provide controlled acceleration rather than applying full motor speed immediately.

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14. Fan Applications

Large fans can consume substantial amounts of power.

The drive can regulate fan speed based on process requirements.

Typical applications include:

• Furnace ventilation
• Exhaust systems
• Industrial air handling
• Dust collection
• Cooling towers
• Process ventilation
• Large HVAC systems
• Combustion-air systems

For variable-torque fan loads, the Light Duty rating can be particularly useful when the actual application requirements fall within the applicable rating conditions.

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15. Conveyor Applications

The 485 A capacity makes the drive suitable for large conveyor systems.

Conveyors can have substantial mechanical inertia and can experience high starting loads.

Controlled acceleration can help reduce:

• Mechanical shock
• Belt stress
• Coupling stress
• Gearbox shock
• Product movement
• Starting-current impact

Typical applications include:

• Mining conveyors
• Bulk material handling
• Cement handling
• Aggregate systems
• Port conveyors
• Steel handling
• Production-line conveyors

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16. Blower Applications

Large industrial blowers may require continuous motor operation with changing process demand.

The drive can regulate blower speed and provide centralized monitoring.

Applications include:

• Wastewater aeration
• Process-air systems
• Pneumatic conveying
• Combustion air
• Industrial ventilation
• Chemical processing

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17. Compressor Applications

Large compressors can also use variable-speed motor control.

The drive can provide controlled acceleration and speed adjustment while communicating with the plant control system.

The actual suitability depends on the compressor type, motor requirements, starting conditions and required speed range.

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18. Mixer and Process Equipment Applications

Large mixers often experience changing loads during production.

The drive can provide adjustable speed and controlled acceleration.

This is useful for:

• Chemical mixing
• Industrial materials
• Bulk solids
• Food-processing machinery
• Chemical processing
• Manufacturing systems

For these applications, the Heavy Duty rating may be more relevant than the Light Duty rating depending on the actual mechanical load.

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19. Major Product Advantages

19.1 High 485 A Current Capacity

The 485 A output rating provides a substantial motor-control capacity.

It allows the drive to be used with large industrial motors without requiring multiple smaller drives for a single motor.

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19.2 450 HP Light Duty Capacity

The approximately 450 HP Light Duty rating gives the drive substantial capacity for appropriate variable-torque loads.

Large fans and pumps can benefit from this type of rating when the actual application conditions meet the relevant requirements.

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19.3 400 HP Normal Duty Capacity

The approximately 400 HP Normal Duty rating provides a strong fit for large continuous industrial loads.

This rating is particularly relevant when the motor operates for extended periods under a relatively predictable load profile.

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19.4 350 HP Heavy Duty Capacity

The approximately 350 HP Heavy Duty rating provides additional overload capability for more demanding mechanical applications.

Typical examples include:

• Conveyors
• Mixers
• High-inertia machinery
• Material-handling equipment
• Process machinery

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19.5 Enhanced LCD HIM

The integrated Enhanced LCD HIM is a significant practical advantage for commissioning and maintenance.

Technicians can access the drive directly rather than depending entirely on a remote PLC or engineering computer.

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19.6 Embedded EtherNet/IP

The integrated network interface simplifies connection to an industrial automation architecture.

This is particularly useful where multiple drives need to be supervised from a central control system.

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19.7 Frame 8 High-Power Construction

The Frame 8 design provides a physical and electrical platform suitable for large motor applications.

It is intended for industrial installations rather than compact machine-control panels.

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19.8 AC Input with Precharge

The AC input with precharge arrangement is designed for the high-power input architecture of the drive.

It helps manage the initial energization of the DC bus and is an important part of the drive’s input-power design.

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19.9 Filtered Configuration

The filtered configuration provides an additional level of electrical-system compatibility for the installation.

The exact system-level requirements should still be evaluated according to the facility’s grounding arrangement, motor-cable configuration and applicable electrical standards.

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20. Physical Dimensions and Weight

The drive is a large Frame 8 industrial assembly.

Mechanical Parameter	Specification
Model	20G1ABD485AN2NNNNN
Frame	Frame 8
Enclosure	Type 1 / IP20
Cabinet Style	600 mm Deep MCC Style
Approx. Height	~2100 mm class
Approx. Width	~610 mm class
Approx. Depth	~465 mm drive-envelope class
Approx. Dimensions	~2100 × 610 × 465 mm
Approx. Weight	Approximately 600–623 kg
Cooling	Forced Air
Installation	Floor / Cabinet / MCC
Mounting Position	Upright
HIM	Enhanced LCD
Service Access	Front / Local Access

The exact mechanical envelope should be confirmed from the applicable dimensional drawing before cabinet fabrication.

The overall installation footprint can be larger than the drive itself because of required cable space, service clearance, ventilation and lifting access.

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21. Weight and Transportation

The equipment is approximately a 600–623 kg class drive.

Weight Item	Approximate Value
Model	20G1ABD485AN2NNNNN
Equipment Weight	~600–623 kg
Approx. Imperial Equivalent	~1,320–1,375 lb
Equipment Class	Heavy Industrial
Installation Handling	Mechanical lifting normally required
Floor Loading	Must be verified
Shipping Weight	May be higher than equipment weight

Because of the weight, installation planning should include:

• Transportation route
• Door and access dimensions
• Floor loading
• Forklift or lifting equipment
• Cabinet positioning
• Maintenance access
• Final cable routing

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22. Cooling System

The 20G1ABD485AN2NNNNN uses forced-air cooling.

High-power semiconductor equipment produces significant heat, so maintaining proper airflow is essential.

Cooling Parameter	Specification
Model	20G1ABD485AN2NNNNN
Cooling Method	Forced Air
Drive Type	Air Cooled
Fan System	Internal Forced-Air Cooling
Cabinet Airflow	Must remain unobstructed
Heat Removal	Required during operation
Dust Control	Important
Fan Inspection	Recommended
Hot-Air Recirculation	Should be avoided
Room Ventilation	Required

If several large drives are installed in the same electrical room, the total heat load should be considered during facility design.

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23. Installation Considerations

Installation Factor	Requirement
Supply Voltage	480 VAC
Phase	Three Phase
Output Current	485 A
Floor Loading	Verify for approximately 600+ kg
Mounting	Secure industrial mounting
Orientation	Upright
Cooling	Adequate airflow
Cabinet Space	Large Frame 8 space required
Cable Space	Provide sufficient working area
Grounding	Proper grounding required
Service Access	Required
Network Access	EtherNet/IP connection
HIM Access	Local operator access
Environment	Protected industrial environment

The Type 1 / IP20 enclosure should be installed in an environment appropriate for this enclosure rating.

It should not be treated as a weatherproof outdoor enclosure.

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24. Maintenance

Preventive maintenance is especially important for a large high-power drive.

Maintenance Item	Recommended Action
Cooling Fans	Inspect operation
Airflow	Check regularly
Cabinet Interior	Remove excessive dust
Power Connections	Inspect for overheating
Motor Cable	Inspect insulation and termination
Grounding	Verify periodically
Ethernet	Check communication
HIM	Check display and keypad
Fault History	Review repeated faults
Drive Temperature	Monitor abnormal heating
Mechanical Load	Check for vibration
Motor	Check motor operating condition

A recurring drive fault should not simply be reset repeatedly.

The motor, mechanical load, power supply, cabling, cooling system and drive configuration should be considered together when diagnosing repeated faults.

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25. HIM Advantage for Maintenance

The AN2 configuration provides a useful advantage during field service.

A technician can work directly at the drive.

For example, during commissioning the technician can:

1. Energize the drive.
2. Verify basic parameters.
3. Check motor data.
4. Confirm control configuration.
5. Check input and output conditions.
6. Test low-speed operation.
7. Verify direction.
8. Check acceleration.
9. Check deceleration.
10. Confirm communication with the PLC.

This can make initial commissioning significantly more convenient than a completely headless drive.

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26. Centralized Automation Architecture

A typical installation can be structured as:

Plant PLC → EtherNet/IP Network → PowerFlex 755 → 480 VAC Motor

The HIM can remain available for maintenance while the PLC manages normal production operation.

This arrangement is particularly useful in large factories where many drives are installed throughout the facility.

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27. Automation Functions

Function	Application
Start / Stop	Motor operation
Speed Reference	Process speed control
Direction	Motor direction
Acceleration	Controlled startup
Deceleration	Controlled stopping
Fault Monitoring	Maintenance
Alarm Monitoring	Process protection
Current Monitoring	Motor-load monitoring
Frequency Monitoring	Speed verification
Status Monitoring	PLC supervision
Parameter Management	Commissioning
Remote Diagnostics	Maintenance

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28. Five Recommended Models from the Same Series or Related Models

The following models are closely related PowerFlex 755 configurations and are useful when selecting alternatives.

Model	Series	Voltage	Current	Light Duty	Normal Duty	Heavy Duty	HIM	Frame	Approx. Weight kg
20G1ABD430AN0NNNNN	PowerFlex 755	480 VAC	430 A	400 HP	350 HP	300 HP	None	8	~620–635
20G1ABD430AN2NNNNN	PowerFlex 755	480 VAC	430 A	400 HP	350 HP	300 HP	Enhanced LCD	8	~620–635
20G1ABD430AN4NNNNN	PowerFlex 755	480 VAC	430 A	400 HP	350 HP	300 HP	Door Mounted	8	~620–635
20G1ABD485AN0NNNNN	PowerFlex 755	480 VAC	485 A	450 HP	400 HP	350 HP	None	8	~600–623
20G1ABD545AN0NNNNN	PowerFlex 755	480 VAC	545 A	500 HP	450 HP	350 HP	None	8	Configuration dependent

These models are useful because they retain the same general PowerFlex 755 architecture while changing current capacity and operator-interface configuration.

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29. Detailed Comparison of Related Models

Parameter	20G1ABD430AN0NNNNN	20G1ABD430AN2NNNNN	20G1ABD430AN4NNNNN	20G1ABD485AN0NNNNN	20G1ABD545AN0NNNNN
Series	PowerFlex 755	PowerFlex 755	PowerFlex 755	PowerFlex 755	PowerFlex 755
Voltage	480 VAC	480 VAC	480 VAC	480 VAC	480 VAC
Phase	3 Phase	3 Phase	3 Phase	3 Phase	3 Phase
Current	430 A	430 A	430 A	485 A	545 A
Light Duty	400 HP	400 HP	400 HP	450 HP	500 HP
Normal Duty	350 HP	350 HP	350 HP	400 HP	450 HP
Heavy Duty	300 HP	300 HP	300 HP	350 HP	350 HP
Frame	8	8	8	8	8
Cooling	Air Cooled	Air Cooled	Air Cooled	Air Cooled	Air Cooled
EtherNet/IP	Yes	Yes	Yes	Yes	Yes
HIM	None	Enhanced LCD	Door Mounted	None	None
Enclosure	IP20 / Type 1	IP20 / Type 1	IP20 / Type 1	IP20 / Type 1	IP20 / Type 1
MCC Style	600 mm	600 mm	600 mm	600 mm	600 mm class
Approx. Dimensions	Large Frame	Large Frame	Large Frame	~2100 × 610 × 465 mm	Large Frame
Approx. Weight	~620–635 kg	~620–635 kg	~620–635 kg	~600–623 kg	Configuration dependent

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30. Why Choose the AN2 Configuration?

The AN2 version is particularly attractive when the application requires both networked automation and local service access.

Compared with the AN0 configuration, the main practical advantage is the Enhanced LCD HIM.

This gives maintenance personnel a direct interface to the drive.

Compared with a smaller PowerFlex drive, the PowerFlex 755 provides a much larger current and power range.

Compared with a larger 545 A configuration, the 485 A model can be a better fit when the motor’s actual current requirement falls within the 485 A range.

The model is therefore a useful balance between high power and serviceability.

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31. Five Popular Models from the Same Brand

The following models represent useful references from different product sizes and families.

Model	Product Family	Voltage Class	Current / Power Class	Typical Application	Approx. Dimensions	Approx. Weight kg
25B-D030N114	PowerFlex 525	480 V class	~30 A class	General Machinery	Compact	Configuration dependent
25C-D030N114	PowerFlex 527	480 V class	~30 A class	Automated Machinery	Compact	Configuration dependent
20G1ABD430AN2NNNNN	PowerFlex 755	480 VAC	430 A	Large Pumps / Fans	Large Frame	~620–635
20G1ABD485AN2NNNNN	PowerFlex 755	480 VAC	485 A	Large Industrial Motors	~2100 × 610 × 465 mm class	~600–623
20G1ABD545AN2NNNNN	PowerFlex 755	480 VAC	545 A	Heavy Industrial Motors	Large Frame	Configuration dependent

The first two models are much smaller drives and are intended for machinery where the motor power is significantly lower.

The PowerFlex 755 models are designed for substantially larger industrial motor systems.

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32. Same-Brand Product Comparison

Parameter	25B-D030N114	25C-D030N114	20G1ABD430AN2NNNNN	20G1ABD485AN2NNNNN	20G1ABD545AN2NNNNN
Product Family	PowerFlex 525	PowerFlex 527	PowerFlex 755	PowerFlex 755	PowerFlex 755
Voltage Class	480 V	480 V	480 V	480 V	480 V
Current Class	~30 A	~30 A	430 A	485 A	545 A
Application Scale	Small / Medium	Small / Medium	Large	Large	Very Large
Frame	Compact	Compact	8	8	8
Cooling	Air Cooled	Air Cooled	Air Cooled	Air Cooled	Air Cooled
Network	EtherNet/IP class	EtherNet/IP	Embedded EtherNet/IP	Embedded EtherNet/IP	Embedded EtherNet/IP
HIM	Configuration dependent	Configuration dependent	Enhanced LCD	Enhanced LCD	Enhanced LCD
Typical Use	Machine Control	Automated Machinery	Large Pumps / Fans	Large Industrial Motors	Heavy Industrial Motors
Dimensions	Compact	Compact	Large Frame	~2100 × 610 × 465 mm class	Large Frame
Weight kg	Configuration dependent	Configuration dependent	~620–635	~600–623	Configuration dependent

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33. 430 A vs. 485 A vs. 545 A

For high-power installations, comparing current ratings is important.

Parameter	20G1ABD430AN2NNNNN	20G1ABD485AN2NNNNN	20G1ABD545AN2NNNNN
Input Voltage	480 VAC	480 VAC	480 VAC
Phase	3 Phase	3 Phase	3 Phase
Output Current	430 A	485 A	545 A
Light Duty	400 HP	450 HP	500 HP
Normal Duty	350 HP	400 HP	450 HP
Heavy Duty	300 HP	350 HP	350 HP
Frame	8	8	8
Cooling	Air Cooled	Air Cooled	Air Cooled
EtherNet/IP	Yes	Yes	Yes
HIM	Enhanced LCD	Enhanced LCD	Enhanced LCD
Enclosure	IP20 / Type 1	IP20 / Type 1	IP20 / Type 1
Approx. Dimensions	Large Frame	~2100 × 610 × 465 mm class	Large Frame
Approx. Weight kg	~620–635	~600–623	Configuration dependent

The 485 A model sits between the 430 A and 545 A configurations and can be selected when the motor’s current requirement is higher than the 430 A class but does not justify moving to a higher-current frame configuration.

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34. AN0 vs. AN2 vs. AN4

The operator-interface option is an important distinction within the same electrical family.

Feature	20G1ABD485AN0NNNNN	20G1ABD485AN2NNNNN	20G1ABD485AN4NNNNN
Voltage	480 VAC	480 VAC	480 VAC
Current	485 A	485 A	485 A
Light Duty	450 HP	450 HP	450 HP
Normal Duty	400 HP	400 HP	400 HP
Heavy Duty	350 HP	350 HP	350 HP
Frame	8	8	8
Cooling	Air Cooled	Air Cooled	Air Cooled
EtherNet/IP	Yes	Yes	Yes
HIM	None	Enhanced LCD	Door Mounted
Local Operation	Limited	Yes	Yes
Maintenance Access	External / Network	Direct	Direct
Enclosure	IP20 / Type 1	IP20 / Type 1	IP20 / Type 1
Approx. Dimensions	Large Frame	~2100 × 610 × 465 mm class	Large Frame
Approx. Weight kg	~600–623	~600–623	~600–623

For applications where technicians regularly work at the drive, the AN2 or AN4 configuration is generally more convenient than the no-HIM AN0 configuration.

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35. Environmental and Installation Considerations

The standard enclosure is Type 1 / IP20.

This means the drive should be installed in a suitable protected industrial environment.

The equipment should be protected against excessive:

• Water
• Condensation
• Conductive dust
• Corrosive chemicals
• Contamination
• Excessive temperature
• Mechanical vibration

The electrical room should also provide adequate ventilation.

For multiple Frame 8 drives installed together, the total room heat load can be substantial.

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36. Engineering Selection Checklist

Selection Item	Check
Motor Voltage	480 VAC class
Motor Current	Must be within applicable drive rating
Motor Power	Within selected duty rating
Load Type	Variable torque / constant torque
Duty Cycle	LD / ND / HD
Starting Torque	Verify
Acceleration	Verify
Deceleration	Verify
Braking Requirement	Verify
Network	EtherNet/IP
HIM Requirement	Required for local operation?
Cabinet Size	Verify Frame 8 dimensions
Floor Loading	Verify 600+ kg class
Cooling	Verify airflow
Cable Routing	Provide adequate space
Grounding	Verify system requirements
Ambient Environment	Verify
Maintenance Access	Provide sufficient clearance

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37. Lifecycle Consideration

The 20G1ABD485AN2NNNNN is a discontinued catalog configuration.

The direct replacement reference is 20G1ABD485JN2NNNNN.

For an existing machine, the original catalog number remains important for identifying installed equipment and matching replacement requirements.

For a new project, the replacement configuration should be evaluated carefully rather than assuming that every option is mechanically and electrically identical.

Particular attention should be paid to:

• Current rating
• Duty rating
• Input configuration
• Filtering
• CM configuration
• HIM configuration
• Communication
• Enclosure
• Dimensions
• Weight
• Motor-control requirements

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38. Product Advantages at a Glance

Advantage	Practical Benefit
485 A Output	Large motor capability
450 HP Light Duty	High-capacity variable-torque applications
400 HP Normal Duty	Large continuous loads
350 HP Heavy Duty	Demanding mechanical applications
480 VAC	Standard industrial voltage class
Frame 8	High-power construction
Air Cooling	Suitable for large drive installations
Embedded EtherNet/IP	Easy automation integration
Enhanced LCD HIM	Convenient commissioning
Local HIM Access	Easier troubleshooting
AC Input with Precharge	Appropriate high-power input architecture
EMC Filtering	Improved electrical compatibility
CM Jumper Removed	Specific grounding/filtering configuration
IP20 / Type 1	Suitable protected industrial installations
MCC Style	Suitable for electrical-room applications

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39. Overall Technical Summary

Parameter	20G1ABD485AN2NNNNN
Brand	Allen-Bradley
Product Family	PowerFlex 750-Series
Product Series	PowerFlex 755
Product Type	Air-Cooled AC Packaged Drive
Input Voltage	480 VAC
Input Phase	3 Phase
Output Current	485 A
Light Duty	450 HP
Normal Duty	400 HP
Heavy Duty	350 HP
Light Duty Power	~336 kW
Normal Duty Power	~298 kW
Heavy Duty Power	~261 kW
DC Voltage Class	650 VDC
Frame	Frame 8
Cooling	Forced Air
Input Type	AC Input with Precharge
DC Input Terminals	None
Dynamic Braking	None
Filtering	Filtered
CM Jumper	Removed
Communication	Embedded EtherNet/IP
HIM	Enhanced LCD
HIM Type	Full Numeric
HIM Operation	Handheld / Local
Enclosure	Type 1 / IP20
Cabinet Style	600 mm Deep MCC Style
Approx. Height	~2100 mm
Approx. Width	~610 mm
Approx. Depth	~465 mm drive-envelope class
Approx. Dimensions	~2100 × 610 × 465 mm
Approx. Weight	~600–623 kg
Cooling	Air Cooled
Primary Applications	Pumps, fans, blowers, conveyors, compressors, mixers
Lifecycle	Discontinued
Direct Replacement Reference	20G1ABD485JN2NNNNN

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40. Final Product Assessment

The 20G1ABD485AN2NNNNN is a large-frame industrial variable-frequency drive designed for high-power 480 VAC motor applications.

Its 485 A output capacity, combined with approximately 450 HP Light Duty, 400 HP Normal Duty and 350 HP Heavy Duty ratings, makes it suitable for a broad range of large industrial machinery.

The model is especially attractive when the installation requires both centralized automation and local service access.

The embedded EtherNet/IP interface allows the drive to become part of a larger PLC and plant-control architecture, while the Enhanced LCD HIM provides technicians with direct access to operating parameters, diagnostics and commissioning functions.

The Frame 8, air-cooled construction is intended for large industrial installations.

With an approximate physical envelope of 2100 × 610 × 465 mm and a weight in the 600–623 kg class, the equipment requires proper planning for cabinet space, floor loading, transportation, lifting and ventilation.

The AN2 configuration is particularly useful where maintenance personnel need direct access to the drive.

Compared with the no-HIM AN0 configuration, the Enhanced LCD interface makes commissioning and troubleshooting more convenient.

Compared with the lower-current 430 A models, the 485 A version provides additional motor capacity.

For applications requiring even more current, the related 545 A and higher-current PowerFlex 755 configurations provide additional capacity.

The most suitable applications include large pumps, industrial fans, blowers, conveyors, compressors, mixers, material-handling equipment and process machinery.

For a large industrial motor system that requires high current capacity, variable-speed control, EtherNet/IP integration and a local operator interface, the 20G1ABD485AN2NNNNN is a strong high-power PowerFlex 755 configuration.