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20G1ABD485AN4NNNNN — PowerFlex 755 Air-Cooled AC Drive

1. Product Overview

The 20G1ABD485AN4NNNNN is a high-power industrial AC variable-frequency drive in the Allen-Bradley PowerFlex 755 series.

It is designed for large three-phase AC motors used in industrial plants, process systems, material-handling equipment, pumping stations, ventilation systems and other applications where high motor current, adjustable speed and centralized automation are required.

The drive is configured for 480 VAC, three-phase power and has a 485 A output-current rating.

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

The model uses a Frame 8 air-cooled construction and a Type 1 / IP20, 600 mm deep MCC-style configuration. It uses AC input with precharge and no DC input terminals, includes an EMC-filtered configuration with the CM jumper removed, and provides embedded EtherNet/IP communication.

A major feature of the AN4 configuration is its door-mounted Enhanced LCD HIM. This provides convenient local access for commissioning, parameter adjustment, operation and troubleshooting while still allowing the drive to be integrated into a plant-wide automation system.

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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 Drive
Model	20G1ABD485AN4NNNNN
Voltage Class	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
Cooling	Forced Air / Air Cooled
Frame	Frame 8
Enclosure	Type 1 / IP20
Cabinet Style	600 mm Deep MCC Style
Communication	Embedded EtherNet/IP
Display	Enhanced LCD
HIM Type	Full Numeric
HIM Position	Door Mounted
Input Type	AC Input with Precharge
DC Input Terminals	None
Dynamic Braking	None
Filtering	EMC Filter
CM Jumper	Removed

The PowerFlex 755 series is intended for high-performance and high-power industrial motor-control applications.

Compared with smaller drive families, it provides a much higher current range and is intended for substantial motors and process equipment.

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3. Main Technical Parameters

Parameter	Specification
Model	20G1ABD485AN4NNNNN
Brand	Allen-Bradley
Product Family	PowerFlex 750-Series
Product Series	PowerFlex 755
Product Type	Air-Cooled AC 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
Approx. Light Duty Power	336 kW
Approx. Normal Duty Power	298 kW
Approx. Heavy Duty Power	261 kW
DC Voltage Class	650 VDC
Frame	Frame 8
Cooling	Forced Air
Input Configuration	AC Input with Precharge
DC Input Terminals	None
Dynamic Braking	None
Filtering	EMC Filter
CM Jumper	Removed
Communication	Embedded EtherNet/IP
HIM	Enhanced LCD
HIM Format	Full Numeric
HIM Installation	Door Mounted
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 physical dimensions and weight are approximate planning values.

The final mechanical envelope can vary depending on the complete installation arrangement, cabinet construction, wiring configuration and associated equipment.

For cabinet fabrication, lifting plans and floor-loading calculations, the exact mechanical drawing for the supplied configuration should be used.

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4. Electrical Specifications

Electrical Parameter	Specification
Model	20G1ABD485AN4NNNNN
Input Voltage	480 VAC
Input Phase	Three Phase
Output Current	485 A
Voltage Class	480 VAC / 650 VDC
Light Duty Rating	450 HP
Normal Duty Rating	400 HP
Heavy Duty Rating	350 HP
Light Duty Equivalent	~336 kW
Normal Duty Equivalent	~298 kW
Heavy Duty Equivalent	~261 kW
Input Type	AC Input with Precharge
DC Input Terminals	None
Dynamic Braking	None
Filtering	EMC Filter
CM Jumper	Removed
Cooling	Air Cooled
Frame	8
Communication	Embedded EtherNet/IP
Operator Interface	Door-Mounted Enhanced LCD HIM

The 485 A output rating makes this a high-capacity industrial drive.

When applying the drive to a specific motor, the motor full-load current and required overload capability should be considered together with the motor horsepower.

The actual load profile is especially important when deciding whether Light Duty, Normal Duty or Heavy Duty operation is appropriate.

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5. Motor Duty Ratings

Duty Classification	Motor Rating	Approx. Metric Equivalent	Typical Load
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

These ratings allow the same basic drive platform to be used across several different types of industrial equipment.

For example, large centrifugal pumps and fans can often make use of the higher Light Duty rating when the application conditions are appropriate.

A conveyor or mixer with high starting torque may instead require the Heavy Duty rating.

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6. Product Configuration

The catalog number 20G1ABD485AN4NNNNN represents a specific electrical and mechanical configuration.

Configuration Item	Specification
Model	20G1ABD485AN4NNNNN
Drive Series	PowerFlex 755
Cooling	Air Cooled
Voltage	480 VAC
Phase	3 Phase
Current	485 A
Frame	8
Enclosure	Type 1 / IP20
Cabinet Style	600 mm Deep MCC
Input	AC Input with Precharge
DC Input	No DC Terminals
Dynamic Braking	None
Filtering	EMC Filter
CM Jumper	Removed
Communication	Embedded EtherNet/IP
HIM	Enhanced LCD
HIM Format	Full Numeric
HIM Location	Door Mounted

The AN4 configuration is particularly useful when the drive is installed in an electrical cabinet or MCC and technicians need direct access to the operator interface without opening the main equipment enclosure.

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7. Door-Mounted Enhanced LCD HIM

The door-mounted HIM is one of the most useful characteristics of the AN4 configuration.

The operator interface provides direct access to the drive without requiring the operator or maintenance technician to rely entirely on a remote PLC or engineering computer.

Typical functions include:

• Drive status monitoring
• Parameter viewing
• Parameter adjustment
• Start and stop functions
• Speed reference adjustment
• Fault identification
• Alarm review
• Diagnostic information
• Commissioning
• Maintenance checks

The door-mounted arrangement is particularly practical for large industrial cabinets because the operator interface can be positioned where maintenance personnel can reach it conveniently.

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8. Why the Door-Mounted HIM Is Useful

For a large Frame 8 drive, the main power section can be physically substantial.

Having the operator interface on the cabinet door can make routine service easier.

A technician can check the drive display without accessing the internal power section.

This is useful for:

• Startup
• Commissioning
• Troubleshooting
• Parameter verification
• Fault diagnosis
• Maintenance
• Local testing

It also provides a more practical interface for equipment installed in dedicated motor-control rooms.

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9. Local and Remote Operation

The drive can be used in a hybrid control architecture.

Normal production operation can be handled by a PLC through EtherNet/IP, while the local HIM remains available for commissioning and maintenance.

Function	Door-Mounted HIM	EtherNet/IP
Parameter Setup	Yes	Yes
Start / Stop	Yes	Yes
Speed Reference	Yes	Yes
Direction	Yes	Yes
Fault Monitoring	Yes	Yes
Alarm Monitoring	Yes	Yes
Status Monitoring	Yes	Yes
Commissioning	Excellent	Excellent
Maintenance	Excellent	Excellent
Centralized Control	Limited	Excellent

This arrangement is particularly useful in large automated production facilities.

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10. Embedded EtherNet/IP

The integrated EtherNet/IP interface allows the drive to communicate directly with a compatible industrial control network.

The PLC or supervisory system can exchange operating commands, speed references, status information and diagnostic information with the drive.

Typical information includes:

• Run status
• Stop status
• Speed reference
• Actual speed
• Output frequency
• Output current
• Fault status
• Alarm status
• Drive operating state
• Parameter information
• Process information

This makes the drive suitable for centralized control systems with multiple distributed motor drives.

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11. Product Introduction

The 20G1ABD485AN4NNNNN is designed to provide variable-speed control for large three-phase AC motors.

A motor connected directly to a fixed-frequency power supply generally operates at a fixed operating speed determined by the motor and supply characteristics.

A variable-frequency drive changes the electrical frequency and voltage supplied to the motor so that motor speed can be controlled.

This allows the process to operate at the speed actually required rather than always running the motor at maximum speed.

For pumps, this can provide flow control.

For fans, it can provide airflow control.

For conveyors, it can provide material-speed control.

For mixers, it can provide process-speed control.

For compressors and other industrial equipment, it can provide controlled acceleration and adjustable operating speed.

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12. High-Power Motor Control

The 485 A output capability allows this drive to operate with large industrial motors.

The drive is therefore better suited to major process equipment than compact machine-level variable-frequency drives.

Typical installations include:

• Electrical rooms
• MCC rooms
• Process plants
• Manufacturing facilities
• Water-treatment facilities
• Mining facilities
• Cement plants
• Steel facilities
• Large HVAC installations

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13. Pump Applications

Large pumps are a major application area for this type of drive.

A pump does not always need to operate at full capacity.

The drive can adjust motor speed according to process demand.

Typical applications include:

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

The drive can also provide controlled acceleration and deceleration.

This can help reduce mechanical shock to the pump, coupling, gearbox and associated piping system.

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14. Fan Applications

Large industrial fans can require substantial motor power.

Variable-speed operation allows fan output to follow actual ventilation requirements.

Typical applications include:

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

For variable-torque fan applications, the Light Duty rating can provide significant available motor capacity.

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15. Blower Applications

Large blowers are frequently used in process systems where airflow needs to be adjusted according to production demand.

Typical applications include:

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

The drive can adjust blower speed while providing status and diagnostic information to the plant automation system.

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16. Conveyor Applications

Large conveyors can have considerable mechanical inertia and starting torque requirements.

The drive can provide controlled acceleration instead of applying full operating speed immediately.

Potential benefits include reduced mechanical shock and smoother material movement.

Typical applications include:

• Mining
• Cement
• Aggregate
• Steel
• Bulk material handling
• Ports
• Warehousing
• Production lines

For demanding conveyor applications, the Heavy Duty rating should be evaluated carefully.

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17. Compressor Applications

Large compressors may also benefit from variable-speed operation.

The drive can provide:

• Controlled acceleration
• Adjustable motor speed
• Centralized monitoring
• Fault reporting
• Process integration
• Network-based control

Actual application suitability depends on the compressor design, motor specifications and required speed range.

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18. Mixer Applications

Large mixers can have highly variable mechanical loads.

The motor may experience greater torque requirements during certain portions of the production cycle.

The drive can provide adjustable speed and controlled acceleration.

Typical applications include:

• Chemical processing
• Bulk material processing
• Food processing
• Industrial mixing
• Manufacturing
• Material preparation

For applications with substantial starting or mixing torque, the Heavy Duty rating should be considered.

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19. Main Product Advantages

19.1 High 485 A Current Capacity

The 485 A output rating gives the drive substantial motor-control capability.

It is appropriate for large industrial motors and high-power process equipment.

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19.2 450 HP Light Duty Rating

The Light Duty rating provides approximately 450 HP of motor capacity for suitable variable-torque applications.

This makes the drive particularly attractive for large fans, pumps and similar equipment.

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19.3 400 HP Normal Duty Rating

The approximately 400 HP Normal Duty rating provides strong capacity for general-purpose industrial motor loads.

It is suitable for many continuous-duty applications where the load profile remains within the Normal Duty requirements.

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19.4 350 HP Heavy Duty Rating

The approximately 350 HP Heavy Duty rating makes the drive suitable for more demanding applications.

Typical examples include:

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

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19.5 Door-Mounted Enhanced LCD

The door-mounted HIM is one of the most important practical advantages of this particular catalog configuration.

Maintenance personnel can access the drive interface without having to reach into the power section.

This simplifies:

• Commissioning
• Troubleshooting
• Parameter adjustment
• Status checking
• Fault diagnosis

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19.6 Embedded EtherNet/IP

The embedded communication interface allows the drive to become part of an integrated automation network.

This is useful for facilities with many motor drives distributed throughout the plant.

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19.7 Frame 8 Construction

The Frame 8 architecture provides the physical and electrical capacity required for large motor applications.

It is designed for substantial industrial equipment rather than compact machine-control installations.

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19.8 AC Input with Precharge

The AC input with precharge arrangement is intended for the high-power input structure of the drive.

It provides a controlled input charging arrangement for the drive’s internal DC bus.

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19.9 Filtered Configuration

The filtered configuration can help with electrical-system compatibility.

System grounding, motor-cable length, EMC requirements and facility electrical architecture should still be evaluated during installation.

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20. Physical Dimensions

The 20G1ABD485AN4NNNNN is a large Frame 8 industrial drive.

Mechanical Parameter	Approximate Specification
Model	20G1ABD485AN4NNNNN
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
Cooling	Forced Air
Mounting	Floor / Cabinet
Installation Orientation	Upright
HIM	Door Mounted Enhanced LCD
Service Access	Front / Door Access

These dimensions should be considered approximate engineering-planning values.

The final equipment arrangement may require additional space around the drive for cable routing, ventilation, maintenance and cabinet-door movement.

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21. Weight

The drive is a heavy industrial assembly.

Weight Parameter	Approximate Value
Model	20G1ABD485AN4NNNNN
Approx. Equipment Weight	600–623 kg
Approx. Weight in Pounds	~1,320–1,375 lb
Equipment Class	Heavy Industrial
Cooling	Air Cooled
Frame	8
Floor Loading	Must be verified
Lifting	Mechanical lifting normally required

The final shipping weight can be higher than the equipment-only weight because packaging, lifting fixtures and associated components may be included.

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22. Cooling System

The drive uses forced-air cooling.

Large power semiconductor devices generate considerable heat, so maintaining proper airflow is essential.

Cooling Parameter	Specification
Model	20G1ABD485AN4NNNNN
Cooling Type	Forced Air
Drive Type	Air Cooled
Cooling Fans	Internal
Airflow	Must remain unobstructed
Cabinet Ventilation	Required
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 room, the combined heat load should be considered in the ventilation design.

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23. Installation Requirements

Installation Item	Consideration
Supply Voltage	480 VAC
Input Phase	3 Phase
Output Current	485 A
Frame	8
Mounting	Secure industrial mounting
Orientation	Upright
Floor Loading	Verify 600+ kg equipment
Cooling	Adequate forced-air ventilation
Cabinet Space	Large Frame 8 space
Cable Routing	Adequate space required
Grounding	Proper grounding required
Network	EtherNet/IP
HIM Access	Door-mounted
Environment	Protected industrial environment
Maintenance	Adequate front access

The IP20 / Type 1 enclosure requires an appropriate protected installation environment.

The drive should not be regarded as a weatherproof outdoor unit.

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24. Maintenance

Because this is a high-power drive, preventive maintenance is important.

Maintenance Item	Recommended Action
Cooling Fans	Inspect operation
Airflow	Check for obstruction
Cabinet Interior	Inspect for dust
Power Terminals	Check for overheating
Motor Cables	Inspect termination
Grounding	Verify periodically
Ethernet Connection	Check communication
HIM	Check display and keypad
Fault History	Review recurring faults
Drive Temperature	Monitor abnormal heating
Motor	Inspect operating condition
Mechanical Load	Check vibration and abnormal load

The door-mounted HIM makes many maintenance tasks easier because technicians can access the drive display directly from the front of the cabinet.

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25. Commissioning Advantages

The AN4 configuration is well suited to commissioning work.

A typical commissioning procedure may include:

1. Verify incoming power.
2. Verify motor nameplate information.
3. Confirm motor-control configuration.
4. Check basic drive parameters.
5. Verify the motor rotation direction.
6. Perform a low-speed test.
7. Confirm acceleration behavior.
8. Confirm deceleration behavior.
9. Verify current levels.
10. Confirm EtherNet/IP communication.
11. Check fault and alarm behavior.
12. Transfer the system into normal automatic operation.

The door-mounted HIM provides a convenient interface throughout these activities.

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26. Automation Architecture

A typical installation can use the following structure:

Plant PLC → EtherNet/IP → PowerFlex 755 → Large AC Motor

The door-mounted HIM remains available for local service and commissioning.

This provides both centralized process control and practical local maintenance access.

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27. Typical Industrial Applications

Industry	Typical Equipment	Suitability
Water Treatment	Large Pumps	Excellent
Wastewater	Pumps / Blowers	Excellent
Mining	Conveyors / Pumps	Excellent
Cement	Fans / Conveyors	Excellent
Steel	Pumps / Fans	Excellent
Manufacturing	Process Machinery	Excellent
Chemical Processing	Pumps / Mixers	Excellent
HVAC	Large Fans / Pumps	Excellent
Material Handling	Conveyors	Excellent
Industrial Utilities	Pumps / Fans	Excellent
Process Plants	Large Motors	Excellent
Energy Facilities	Auxiliary Motors	Good

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

The following models are closely related PowerFlex 755 configurations.

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 alternatives because they share the same general PowerFlex 755 architecture while providing different current capacities and operator-interface arrangements.

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29. Detailed Related-Model Comparison

Parameter	20G1ABD430AN0NNNNN	20G1ABD430AN2NNNNN	20G1ABD430AN4NNNNN	20G1ABD485AN0NNNNN	20G1ABD545AN0NNNNN
Series	PowerFlex 755	PowerFlex 755	PowerFlex 755	PowerFlex 755	PowerFlex 755
Input	480 VAC	480 VAC	480 VAC	480 VAC	480 VAC
Phase	3 Phase	3 Phase	3 Phase	3 Phase	3 Phase
Output 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
Cabinet Style	600 mm MCC	600 mm MCC	600 mm MCC	600 mm MCC	600 mm class
Approx. Dimensions	Large Frame	Large Frame	Large Frame	~2100 × 610 × 465 mm class	Large Frame
Approx. Weight kg	~620–635	~620–635	~620–635	~600–623	Configuration dependent

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30. AN0, AN2 and AN4 Comparison

For this group of PowerFlex 755 drives, the operator-interface configuration is an important selection factor.

Feature	AN0	AN2	AN4
Local HIM	No	Enhanced LCD	Door Mounted Enhanced LCD
Local Parameter Access	Limited	Yes	Yes
Local Commissioning	External interface required	Yes	Yes
Door Access	No dedicated HIM	Local/Handheld	Direct door access
Maintenance Convenience	Moderate	High	Very High
Centralized EtherNet/IP	Yes	Yes	Yes
Typical Installation	Automated cabinet	Service-access installation	MCC / cabinet with front access

For a drive installed deep inside a large electrical room or MCC, the AN4 configuration is particularly practical because the operator interface is directly accessible from the cabinet door.

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31. 430 A, 485 A and 545 A Selection

Parameter	20G1ABD430AN4NNNNN	20G1ABD485AN4NNNNN	20G1ABD545AN4NNNNN
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	Door Mounted	Door Mounted	Door Mounted
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 configuration is a useful middle option when the 430 A capacity is insufficient but a higher-current 545 A configuration would provide more capacity than required.

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32. Five Popular Models from the Same Brand

The following models cover different drive sizes and application categories.

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
20G1ABD430AN4NNNNN	PowerFlex 755	480 VAC	430 A	Large Pumps / Fans	Large Frame	~620–635
20G1ABD485AN4NNNNN	PowerFlex 755	480 VAC	485 A	Large Industrial Motors	~2100 × 610 × 465 mm class	~600–623
20G1ABD545AN4NNNNN	PowerFlex 755	480 VAC	545 A	Heavy Industrial Motors	Large Frame	Configuration dependent

The PowerFlex 525 and PowerFlex 527 models are designed for much smaller motor applications.

The PowerFlex 755 models are appropriate when the motor size reaches the several-hundred-horsepower range.

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33. Same-Brand Comparison

Parameter	25B-D030N114	25C-D030N114	20G1ABD430AN4NNNNN	20G1ABD485AN4NNNNN	20G1ABD545AN4NNNNN
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
Communication	EtherNet/IP class	EtherNet/IP	Embedded EtherNet/IP	Embedded EtherNet/IP	Embedded EtherNet/IP
HIM	Configuration dependent	Configuration dependent	Door Mounted	Door Mounted	Door Mounted
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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34. Electrical and Mechanical Advantages

The 20G1ABD485AN4NNNNN combines several features that are valuable in large industrial installations.

The 485 A current capacity provides enough electrical capacity for large motors.

The 480 VAC three-phase input matches a common industrial power class.

The Frame 8 construction provides a suitable platform for large-power equipment.

The air-cooled design provides forced-air heat removal without requiring a liquid-cooling system.

The embedded EtherNet/IP interface makes the drive suitable for centralized automation.

The door-mounted Enhanced LCD HIM provides convenient access for local operation and service.

The Type 1 / IP20 configuration is appropriate for a protected electrical-room or cabinet installation.

The 600 mm deep MCC-style arrangement is intended for large industrial motor-control installations.

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35. Maintenance and Troubleshooting Advantages

The door-mounted HIM can significantly simplify troubleshooting.

A technician can observe the drive status without opening the main power enclosure.

Typical information available through the operator interface can include:

• Operating state
• Speed
• Frequency
• Current
• Fault conditions
• Alarm conditions
• Parameter values
• Control status
• Diagnostic information

This can shorten the time required to identify basic operating problems.

For a large industrial installation where downtime is costly, direct access to drive information is a practical advantage.

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36. Engineering Selection Checklist

Selection Item	Recommended Check
Motor Voltage	480 VAC class
Motor Current	Verify against 485 A capacity
Motor Power	Verify against selected duty rating
Load Type	Variable torque / constant torque
Duty	LD / ND / HD
Starting Torque	Verify
Acceleration Time	Verify
Deceleration Time	Verify
Braking Requirement	Evaluate
Network	EtherNet/IP
Local Interface	Door-mounted HIM
Cabinet Space	Verify Frame 8 dimensions
Floor Loading	Verify 600+ kg
Ventilation	Verify airflow
Cable Routing	Provide adequate space
Grounding	Verify system design
Environment	Protected industrial area
Maintenance Access	Provide adequate clearance

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37. Lifecycle and Replacement

The 20G1ABD485AN4NNNNN is a discontinued catalog configuration.

Its direct replacement reference is 20G1ABD485JN4NNNNN.

For an existing machine, the original model number remains important for identifying installed equipment.

For a replacement project, the newer configuration should be evaluated against the original installation rather than assuming that every option is identical.

Particular attention should be given to:

• Input configuration
• Output current
• Duty rating
• Filtering
• CM configuration
• HIM
• Communication
• Enclosure
• Physical dimensions
• Weight
• Motor-control requirements
• Cabinet arrangement

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38. Recommended Applications by Load Type

Load Type	Recommended Duty Consideration	Application
Centrifugal Pump	Light / Normal Duty depending on load	Water systems
Large Fan	Light Duty often applicable	Ventilation
Industrial Blower	Light / Normal Duty	Process air
Conveyor	Normal / Heavy Duty	Material handling
Mixer	Heavy Duty often preferred	Process machinery
Compressor	Normal / Heavy Duty depending on load	Industrial process
High-Inertia Machine	Heavy Duty	Manufacturing
Cooling Pump	Light / Normal Duty	Industrial utilities
Process Pump	Normal Duty	Chemical / process
Large HVAC Fan	Light Duty	HVAC

The actual drive rating must always be selected from the motor current and complete load profile.

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39. Overall Product Advantages

Advantage	Practical Result
485 A Output	Large motor compatibility
450 HP Light Duty	High-capacity variable-torque applications
400 HP Normal Duty	Large continuous industrial loads
350 HP Heavy Duty	Demanding mechanical loads
480 VAC	Common industrial power class
Frame 8	High-power construction
Air Cooled	Practical thermal management
EtherNet/IP	Centralized automation
Enhanced LCD HIM	Convenient local operation
Door Mounted HIM	Easy service access
AC Precharge	High-power input arrangement
EMC Filtering	Electrical-system compatibility
No DC Terminals	Defined AC-input configuration
IP20 / Type 1	Protected industrial installation
MCC Style	Suitable for electrical-room applications

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40. Final Technical Parameter Table

Parameter	20G1ABD485AN4NNNNN
Brand	Allen-Bradley
Product Family	PowerFlex 750-Series
Product Series	PowerFlex 755
Product Type	Air-Cooled AC 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
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	EMC Filter
CM Jumper	Removed
Communication	Embedded EtherNet/IP
Display	Enhanced LCD
HIM	Full Numeric
HIM Location	Door Mounted
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 Method	Air Cooled
Installation	Floor / Cabinet / MCC
Main Applications	Pumps, fans, blowers, conveyors, compressors, mixers
Lifecycle	Discontinued
Direct Replacement Reference	20G1ABD485JN4NNNNN

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41. Overall Product Assessment

The 20G1ABD485AN4NNNNN is a high-power PowerFlex 755 AC drive designed for large 480 VAC three-phase motors.

Its 485 A output capacity and approximately 450 HP Light Duty, 400 HP Normal Duty and 350 HP Heavy Duty ratings provide a wide operating range for industrial equipment.

The model is especially suitable for applications where the drive must combine high motor capacity with convenient local operator access.

The door-mounted Enhanced LCD HIM is the defining practical advantage of the AN4 configuration.

It allows operators and maintenance technicians to view drive information, adjust parameters and perform commissioning activities directly from the front of the equipment.

At the same time, the embedded EtherNet/IP interface allows the drive to communicate with a centralized PLC, HMI or SCADA system.

This combination is well suited to modern automated industrial facilities.

The Frame 8 air-cooled construction makes the unit appropriate for large motor installations.

Its approximate physical envelope is in the 2100 × 610 × 465 mm class, while the equipment weight is approximately 600–623 kg.

Because of this size and weight, installation planning should include floor loading, transportation, lifting, cabinet space, ventilation and service access.

The drive is particularly well suited to large pumps, industrial fans, blowers, conveyors, compressors, mixers, cooling systems, material-handling equipment and process machinery.

For applications where local access is important, the AN4 configuration offers a practical advantage over no-HIM configurations.

For applications requiring lower current, the related 430 A PowerFlex 755 models can provide a more appropriately sized solution.

For applications requiring additional current capacity, the 545 A and higher-current configurations can be considered.

Overall, the 20G1ABD485AN4NNNNN can be characterized as a 485 A, 480 VAC, three-phase, Frame 8, air-cooled PowerFlex 755 drive with embedded EtherNet/IP, AC input with precharge, EMC filtering, no DC input terminals and a door-mounted Enhanced LCD full-numeric HIM.

It is a strong choice for large industrial motor systems where high power, variable-speed control, network integration and convenient local maintenance access are all required.