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20G1ABD485JN2NNNNN — PowerFlex 755 Air-Cooled AC Drive

1. Product Overview

The 20G1ABD485JN2NNNNN is a high-power air-cooled AC drive from the Allen-Bradley PowerFlex 755 series. It is designed for large industrial motor-control applications where high current capacity, flexible speed control, reliable operation, and integration with an industrial automation network are required.

This model is rated for 480 VAC, three-phase input and 485 A output current. Its power capability reaches approximately 450 HP for Light Duty, 400 HP for Normal Duty, and 350 HP for Heavy Duty applications.

The drive uses a Frame 8 construction and a 600 mm deep MCC-style, Type 1 / IP20 configuration. It is intended for installation in industrial control rooms, electrical cabinets, motor-control centers, and other controlled industrial environments.

The 20G1ABD485JN2NNNNN includes embedded EtherNet/IP, making it suitable for direct integration into a PLC-based automation system. The configuration also includes an Enhanced LCD, full numeric, handheld/local HIM, providing a practical interface for commissioning, local adjustment, diagnostics, and maintenance.

The input configuration uses AC input with precharge and no DC terminals. The drive has a filtered configuration with the CM jumper installed, and dynamic braking is not included in this particular catalog configuration.

For large pumps, fans, conveyors, compressors, mixers, material-handling systems, process machinery, and other high-power motor applications, this model provides a combination of substantial output capacity and flexible control architecture.

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2. Brand and Series

Item	Description
Brand	Allen-Bradley
Product Family	PowerFlex 750-Series
Product Series	PowerFlex 755
Product Type	Air-Cooled AC Drive
Catalog Number	20G1ABD485JN2NNNNN
Drive Type	Variable Frequency AC Drive
Cooling Method	Forced Air / Air Cooled
Frame	Frame 8
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
Communication	Embedded EtherNet/IP
HIM	Enhanced LCD, Full Numeric, Handheld/Local
Enclosure	Type 1 / IP20
Cabinet Style	600 mm Deep MCC Style
Input Arrangement	AC Input with Precharge
DC Terminals	None
Dynamic Braking	None
Filtering	Filtered
CM Jumper	Installed
Frame Size	8

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3. Main Technical Parameters

Parameter	Specification
Model / Catalog Number	20G1ABD485JN2NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Family	PowerFlex 750-Series
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
Voltage Class	480 VAC / 650 VDC class
Frame Size	Frame 8
Cooling	Forced Air
Input Type	AC Input with Precharge
DC Terminals	None
Dynamic Braking	None
Filtering	Filtered
CM Jumper	Installed
Communication	Embedded EtherNet/IP
Operator Interface	Enhanced LCD, Full Numeric
HIM Arrangement	Handheld / Local
Enclosure	Type 1
IP Rating	IP20
Cabinet Style	600 mm Deep MCC Style
Approx. Height	~2100 mm
Approx. Width	~610 mm
Approx. Depth	~465 mm
Approx. Weight	~600–623 kg
Installation	Industrial MCC / Electrical Cabinet
Application Class	Large Industrial Motor Control

Dimensions and weight are engineering reference values and can vary according to the final drive arrangement, mounting configuration, accessories, cabinet structure, and shipping configuration. The actual mechanical drawing and equipment nameplate should be used for final installation planning.

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4. Electrical Rating

The 20G1ABD485JN2NNNNN is designed for 480 VAC, three-phase industrial power systems and provides a continuous current class of approximately 485 A.

This places the model in the high-power segment of the PowerFlex 755 range.

The drive offers different horsepower ratings depending on application duty. The approximate ratings are:

Duty Type	Approx. Horsepower	Approx. Power
Light Duty	450 HP	~336 kW
Normal Duty	400 HP	~298 kW
Heavy Duty	350 HP	~261 kW

The Heavy Duty rating is lower than the Light Duty rating because Heavy Duty applications normally impose greater thermal and overload demands on the drive.

For engineering selection, motor nameplate current should be compared with the applicable drive current rating rather than selecting the drive from horsepower alone.

This is especially important for conveyors, crushers, mixers, compressors, and other equipment where the motor may experience substantial torque during acceleration or changing load conditions.

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5. High-Current Frame 8 Construction

The Frame 8 configuration is intended for large motor applications.

Compared with compact PowerFlex drives, this drive has a substantially larger physical structure, higher cooling requirements, and greater installation requirements.

The large frame provides the physical and thermal capacity required for a 485 A-class power stage.

The drive is therefore better suited to centralized industrial electrical installations than to small machine-control cabinets.

Typical installation locations include:

• Motor control centers.
• Large electrical cabinets.
• Industrial electrical rooms.
• Process-control buildings.
• Mining electrical installations.
• Manufacturing plants.
• Utility equipment rooms.
• Heavy industrial automation systems.

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6. AC Input with Precharge

The 20G1ABD485JN2NNNNN uses an AC input with precharge.

Precharge is particularly important in high-power drives because the internal DC bus contains substantial energy-storage components.

During energization, the precharge circuit controls the initial charging process of the DC bus rather than allowing an uncontrolled charging current.

This arrangement helps reduce electrical stress on the input and DC-bus components.

The catalog configuration does not provide DC terminals, so the drive is intended to be supplied through its specified AC input architecture.

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7. Filtering and CM Jumper Configuration

The 20G1ABD485JN2NNNNN uses a filtered configuration with the CM jumper installed.

The filtering arrangement is intended to assist with electromagnetic compatibility within the industrial installation.

However, the drive filter does not eliminate the need for correct installation practices.

The complete system should still consider:

• Motor cable construction.
• Cable shielding.
• Grounding.
• Cabinet bonding.
• Control-cable routing.
• Separation of power and signal cables.
• Motor cable length.
• Installation of other electrical equipment.

A properly designed grounding and cable system is particularly important for high-power variable-frequency-drive installations.

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8. Embedded EtherNet/IP

One of the most useful features of the 20G1ABD485JN2NNNNN is its embedded EtherNet/IP communication capability.

The drive can be incorporated directly into an industrial Ethernet control architecture.

A typical system can be structured as:

PLC → EtherNet/IP Network → PowerFlex 755 → Motor → Mechanical Load

This arrangement allows the controller to exchange operational information with the drive.

Typical information can include:

• Start command.
• Stop command.
• Speed reference.
• Direction command.
• Actual output frequency.
• Motor current.
• Drive status.
• Warning status.
• Fault status.
• Fault reset.
• Operating condition.
• Parameter information.

The result is a much more integrated control system than a simple hardwired start/stop arrangement.

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9. Enhanced LCD Full Numeric HIM

The 20G1ABD485JN2NNNNN includes an Enhanced LCD, Full Numeric HIM in a handheld/local configuration.

This interface is useful during:

• Initial commissioning.
• Motor parameter setup.
• Drive parameter adjustment.
• Local testing.
• Fault investigation.
• Maintenance.
• Troubleshooting.
• Manual operation.

The HIM provides engineers and technicians with a local method of interacting with the drive without requiring every adjustment to be performed through the PLC.

This is especially useful during commissioning when the automation system may not yet be fully operational.

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10. Local Operation and Commissioning

A local HIM is particularly valuable during the initial startup process.

For example, a technician can verify drive parameters and operating conditions before the complete production system is placed into automatic operation.

Typical commissioning activities include:

1. Verify input voltage.
2. Confirm motor nameplate information.
3. Configure motor parameters.
4. Confirm motor rotation.
5. Verify acceleration and deceleration settings.
6. Check current feedback.
7. Check speed reference.
8. Confirm communication.
9. Test fault handling.
10. Confirm PLC commands.
11. Test automatic operation.
12. Record final parameters.

The local interface provides a practical diagnostic point when troubleshooting a large motor system.

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11. Forced-Air Cooling

The 20G1ABD485JN2NNNNN uses forced-air cooling.

Large drives generate substantial heat during operation, particularly at high output current.

The forced-air system removes heat from the power section and transfers it into the surrounding cabinet or electrical-room ventilation system.

The cooling system should therefore be considered part of the complete installation rather than simply an internal drive feature.

Important factors include:

• Ambient temperature.
• Air inlet temperature.
• Cabinet ventilation.
• Airflow direction.
• Fan condition.
• Dust accumulation.
• Filter condition.
• Electrical-room ventilation.
• Heat generated by other equipment.

Regular inspection of the cooling system is important for high-power drive installations.

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12. Cooling System Parameters

Cooling Item	Approximate / Typical Value
Cooling Type	Forced Air
Fan Type	Backward Curved Centrifugal
Approx. Airflow	~1805 m³/h
Approx. Fan Input	~0.45 kW
Approx. Fan Efficiency	~63.7%
Drive Frame	Frame 8
Thermal Design	High-Power Industrial Cooling

The actual operating temperature and airflow requirements should be verified against the final installation conditions.

A drive operating in a dusty environment may require more frequent cooling-system inspection than the same drive installed in a clean electrical room.

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13. Enclosure and Environmental Configuration

The catalog configuration is specified as Type 1 / IP20 and uses a 600 mm deep MCC-style enclosure arrangement.

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

It should not automatically be considered suitable for direct outdoor installation or locations where the drive will be exposed to water, heavy dust, corrosive materials, or uncontrolled environmental conditions.

If the drive is installed in a cabinet, the cabinet itself must provide the environmental protection required by the application.

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14. Mechanical Dimensions

The approximate physical envelope for this large Frame 8 configuration can be considered approximately:

2100 mm H × 610 mm W × 465 mm D

Mechanical Parameter	Approximate Value
Height	~2100 mm
Width	~610 mm
Depth	~465 mm
Approximate Weight	~600–623 kg
Frame	8
Enclosure Style	600 mm Deep MCC Style
Enclosure Rating	Type 1 / IP20
Cooling	Forced Air
Installation Orientation	Vertical

These dimensions should be used only for preliminary engineering.

The final installation should always be based on the applicable mechanical drawing because cable-entry arrangements, mounting hardware, accessories, and cabinet construction can affect the final space requirements.

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15. Weight and Handling

The approximate weight of the complete drive assembly is in the 600–623 kg class.

This is a substantial mechanical load and should be considered during transportation, installation, and future maintenance.

Before the drive is installed, the project should confirm:

• Floor loading.
• Cabinet support.
• Lifting equipment.
• Transportation route.
• Door dimensions.
• Service clearance.
• Cable access.
• Removal procedure.
• Maintenance access.

Large Frame 8 equipment should be handled with suitable industrial lifting equipment.

The weight of the drive also means that replacement planning should be considered during the original installation. Adequate access can substantially reduce future maintenance time.

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16. Typical Applications

16.1 Pumps

The 20G1ABD485JN2NNNNN is well suited to large industrial pump systems.

Typical applications include:

• Water treatment.
• Wastewater treatment.
• Cooling-water circulation.
• Process-water systems.
• Mining dewatering.
• Industrial pumping stations.
• Chemical process pumps.
• Large irrigation systems.

Variable-speed control allows pump speed to follow actual process requirements.

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16.2 Fans and Blowers

Large fans and blowers can require hundreds of horsepower.

Typical applications include:

• Industrial ventilation.
• Furnace systems.
• Dust collection.
• Exhaust systems.
• Cooling systems.
• Air-handling systems.
• Process ventilation.

The drive can adjust fan speed according to airflow demand rather than requiring the motor to run continuously at full speed.

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16.3 Conveyors

Conveyor systems are another important application.

Examples include:

• Mining conveyors.
• Bulk-material conveyors.
• Port equipment.
• Cement plants.
• Aggregate handling.
• Warehouse systems.
• Heavy manufacturing.

Controlled acceleration can reduce mechanical shock on belts, couplings, gearboxes, and other drivetrain components.

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16.4 Compressors

Large compressors can require substantial motor current and controlled starting.

The drive can be used in applications such as:

• Industrial air compressors.
• Process compressors.
• Gas-related equipment.
• Refrigeration systems.
• Manufacturing utilities.

The final drive selection should take compressor torque requirements and overload characteristics into account.

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16.5 Mixers and Agitators

Industrial mixers may experience significant changes in mechanical load.

The drive allows motor speed to be adjusted according to:

• Product viscosity.
• Mixing stage.
• Production recipe.
• Material condition.
• Required mixing intensity.

This makes variable-speed operation useful for large process mixers.

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16.6 Material Handling

Large material-handling systems often require precise control of acceleration, speed, and stopping.

Applications can include:

• Cranes.
• Hoists.
• Conveyors.
• Feeders.
• Bulk-material systems.
• Industrial transfer equipment.

The specific application must be evaluated for braking and regenerative requirements because this catalog configuration does not include dynamic braking.

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17. Main Product Advantages

17.1 High 485 A Current Rating

The 485 A output capability makes this drive suitable for large motors.

It provides significantly greater capacity than compact machine-level variable-frequency drives.

This makes it suitable for centralized high-power motor-control systems.

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17.2 450 HP Light Duty Capability

The approximate 450 HP Light Duty rating provides a substantial power range for large industrial equipment.

This makes the drive useful for applications where the motor operates under relatively moderate overload conditions.

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17.3 400 HP Normal Duty Capability

The approximately 400 HP Normal Duty rating provides a strong selection point for continuous industrial applications.

This rating is especially relevant for applications such as pumps, fans, and other equipment with relatively predictable load characteristics.

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17.4 350 HP Heavy Duty Capability

The approximately 350 HP Heavy Duty rating is suitable for more demanding mechanical applications.

Heavy-duty operation is particularly relevant when the motor experiences:

• High starting torque.
• Frequent acceleration.
• High transient load.
• Shock loading.
• Changing mechanical resistance.

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17.5 Embedded EtherNet/IP

Integrated communication simplifies automation-system integration.

It can reduce hardwired control requirements and provide convenient access to operating information.

For plants with centralized PLC control, this can significantly improve system organization.

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17.6 Enhanced LCD HIM

The Enhanced LCD Full Numeric HIM provides a useful local commissioning and maintenance interface.

This is particularly valuable in large systems where technicians need local access during startup or troubleshooting.

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17.7 Large Industrial Frame

Frame 8 construction is designed for high-power applications.

The large frame provides the electrical and thermal capacity required for the 485 A current class.

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17.8 Filtered Configuration

The filtered configuration helps address electromagnetic compatibility requirements within a properly engineered installation.

It works together with appropriate grounding, cable routing, motor-cable selection, and cabinet construction.

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17.9 Precharge Input

The AC input with precharge is appropriate for a high-power drive because it controls initial DC-bus charging.

This helps reduce the stress associated with energizing a large DC-bus system.

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18. Maintenance Advantages

The combination of network communication and local HIM access provides two useful maintenance paths.

The local interface can be used for direct inspection and commissioning.

The network interface can be used by the automation system to monitor drive status and faults.

This makes it possible to identify problems such as:

• Drive faults.
• Overcurrent conditions.
• Overtemperature conditions.
• Communication problems.
• Abnormal motor current.
• Operating-state changes.
• Warning conditions.

Preventive maintenance should focus on cooling fans, airflow, electrical connections, cabinet cleanliness, motor cables, grounding, and network connections.

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19. Installation Recommendations

The 20G1ABD485JN2NNNNN should be installed in a location that provides sufficient space for cooling and maintenance.

Installation Factor	Recommended Consideration
Mounting	Secure vertical industrial mounting
Structural Capacity	Suitable for approximately 600–623 kg class
Airflow	Provide sufficient ventilation
Cabinet Cooling	Calculate total heat dissipation
Dust	Keep cooling airflow reasonably clean
Grounding	Provide proper protective and EMC grounding
Motor Cable	Use suitable industrial cable
Cable Routing	Separate power and sensitive control wiring where appropriate
Network	Use suitable industrial Ethernet infrastructure
Service Access	Maintain access for inspection and maintenance
Lifting	Use appropriate equipment for Frame 8
Environment	Controlled industrial environment
Enclosure	Confirm Type 1 / IP20 suitability

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20. Motor Selection Considerations

When selecting this drive for a motor, the following parameters should be checked:

Motor Parameter	Selection Requirement
Motor Voltage	Compatible with 480 VAC drive system
Motor Current	Must fall within applicable drive duty rating
Motor Power	Compare with LD / ND / HD rating
Motor Frequency	Confirm motor operating frequency
Motor Speed	Confirm required operating speed range
Starting Torque	Check application requirements
Overload	Confirm required overload capacity
Acceleration	Confirm acceleration time
Deceleration	Confirm deceleration requirements
Braking	Verify whether external braking is required
Motor Cable	Verify cable length and construction
Environment	Verify temperature and installation conditions

The motor’s nameplate current is particularly important.

A drive should not be selected from horsepower alone, especially when the application has a high torque requirement.

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21. Duty Classification Guide

Application Type	Typical Duty Consideration
Centrifugal Pump	Often Normal Duty / Light Duty depending on system
Centrifugal Fan	Often Light Duty / Normal Duty
Conveyor	Often Normal Duty / Heavy Duty
Crusher	Heavy Duty
Mixer	Normal Duty / Heavy Duty
Compressor	Normal Duty / Heavy Duty depending on design
Extruder	Heavy Duty
Process Fan	Light Duty / Normal Duty
Material Handling	Normal Duty / Heavy Duty
Large Agitator	Normal Duty / Heavy Duty

This table is a general engineering guide only. Actual selection should be based on motor current and the manufacturer’s application requirements.

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22. Recommended Five Related PowerFlex 755 Models

The following models are useful alternatives or related selections within the same high-power PowerFlex 755 family.

Model	Voltage	Current	Approx. Duty Rating	Frame	Main Difference
20G1ABD430JN2NNNNN	480 VAC, 3 PH	430 A	~400 HP LD / 350 HP ND / 300 HP HD	8	Lower current capacity
20G1ABD485JN0NNNNN	480 VAC, 3 PH	485 A	450 HP LD / 400 HP ND / 350 HP HD	8	Same current class, no HIM
20G1ABD485JN4NNNNN	480 VAC, 3 PH	485 A	450 HP LD / 400 HP ND / 350 HP HD	8	Door-mounted HIM configuration
20G1ABD545JN2NNNNN	480 VAC, 3 PH	545 A	Higher-power class	8	Higher current capacity
20G1ABD617JN2NNNNN	480 VAC, 3 PH	617 A	Higher-power class	8	Larger motor applications

The most closely related alternatives are the 20G1ABD485JN0NNNNN and 20G1ABD485JN4NNNNN.

The first uses a blank/no-HIM arrangement, while the latter provides a door-mounted operator interface configuration.

The 430 A version is useful where the motor current is lower.

The 545 A and 617 A versions are appropriate when additional current capacity is required.

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23. Related Model Comparison

Model	Current	Light Duty	Normal Duty	Heavy Duty	HIM / Interface
20G1ABD430JN2NNNNN	430 A	~400 HP	~350 HP	~300 HP	Enhanced LCD / Local
20G1ABD485JN0NNNNN	485 A	450 HP	400 HP	350 HP	Blank / No HIM
20G1ABD485JN2NNNNN	485 A	450 HP	400 HP	350 HP	Enhanced LCD / Handheld-Local
20G1ABD485JN4NNNNN	485 A	450 HP	400 HP	350 HP	Door-Mounted HIM
20G1ABD545JN2NNNNN	545 A	~450 HP	~400 HP	~350 HP class	Enhanced LCD / Local

This comparison makes the 20G1ABD485JN2NNNNN a particularly balanced selection within the 480 VAC high-power range.

It provides the same 485 A current class as the other 485 A configurations while offering a convenient local HIM arrangement.

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24. 485 A Configuration Comparison

The three 485 A configurations are especially useful when the electrical rating is already established but the operator-interface requirement changes.

Model	Current	HIM Configuration	Typical Selection Reason
20G1ABD485JN0NNNNN	485 A	Blank / No HIM	Centralized PLC/HMI control
20G1ABD485JN2NNNNN	485 A	Enhanced LCD, Full Numeric, Handheld/Local	Local commissioning and maintenance
20G1ABD485JN4NNNNN	485 A	Door-Mounted HIM	Local operator access at cabinet door

This makes the catalog number selection more flexible.

The basic power section can remain within the same 485 A class while the user chooses an interface arrangement appropriate for the control cabinet and operating philosophy.

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25. Five Popular Allen-Bradley Models

The following five models represent useful and popular products from the same overall Allen-Bradley industrial drive portfolio.

Model	Series	Voltage / Current Class	Typical Application	Product Position
25B-D030N114	PowerFlex 525	480 VAC class / ~30 A	General-purpose machine control	Compact drive
25C-D030N114	PowerFlex 527	480 VAC class / ~30 A	Networked machine automation	Compact automation drive
20G1ABC302JN4NNNNN	PowerFlex 755	400 VAC class / 302 A	Large industrial motors	High-power drive
20G1ABC460JN4NNNNN	PowerFlex 755	400 VAC class / 460 A	Pumps, fans, conveyors	High-power drive
20G1ABC650JN4NNNNN	PowerFlex 755	400 VAC class / 650 A	Heavy industrial equipment	Large-frame drive

These models are not all direct electrical substitutes for the 20G1ABD485JN2NNNNN.

The 25B and 25C models occupy a much smaller power range and are better suited to compact machines.

The 20G1ABC models operate in the 400 VAC class and therefore serve different power-system requirements.

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26. PowerFlex 525 vs. PowerFlex 755

The difference between compact and high-power drive families can be illustrated as follows.

Feature	20G1ABD485JN2NNNNN	25B-D030N114
Series	PowerFlex 755	PowerFlex 525
Current Class	485 A	~30 A class
Voltage	480 VAC	480 VAC class
Frame	Frame 8	Compact
Application	Large industrial motors	Small/medium motors
Cooling	Forced Air	Compact cooling
Installation	MCC / large cabinet	Machine/control cabinet
HIM	Enhanced LCD / Local	Compact drive interface
Communication	Embedded EtherNet/IP	Network-capable
Typical Motor Size	Hundreds of HP	Much smaller motors
Approx. Weight	~600–623 kg	Much lighter

This comparison demonstrates why the 20G1ABD485JN2NNNNN should be selected for large industrial systems rather than compact machine applications.

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27. Industrial Automation Architecture

A typical installation can use the drive as part of a centralized automation system.

Operator HMI → PLC → EtherNet/IP → PowerFlex 755 → Motor → Mechanical Equipment

The operator may enter a speed command through the HMI.

The PLC can process the command and send the required reference to the drive.

The drive then controls the motor according to the configured operating parameters.

At the same time, the drive can return operating information to the PLC.

This creates a continuous control and monitoring loop.

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28. Example: Conveyor Application

Consider a large conveyor carrying bulk material.

A direct motor starter would normally provide only basic starting and stopping.

With a variable-frequency drive, the motor can be accelerated gradually.

The drive can receive a speed reference from the PLC.

The PLC can monitor drive status and motor current.

If the process requires a lower conveyor speed, the controller can reduce the speed reference.

During maintenance, the local HIM can provide technicians with access to drive parameters and diagnostic information.

This type of application makes full use of the 20G1ABD485JN2NNNNN’s high current capacity, local interface, and industrial communication capability.

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29. Example: Large Pump Application

For a large process-water pump, the drive can regulate motor speed according to system demand.

A pressure sensor can provide process feedback to the controller.

The controller can then adjust the drive speed reference.

When demand increases, the motor can accelerate.

When demand decreases, the motor can slow down.

This approach provides considerably more flexibility than operating the pump continuously at fixed speed.

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30. Example: Large Fan Application

A large industrial fan may not require full airflow continuously.

The drive can reduce motor speed when process demand is lower.

The PLC can monitor process conditions and issue a corresponding speed reference.

The drive then adjusts motor speed accordingly.

This type of variable-speed control is one of the common applications for high-power AC drives.

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31. Maintenance and Troubleshooting

A good maintenance program for the 20G1ABD485JN2NNNNN should include both electrical and mechanical inspection.

Cooling System

Inspect fans, airflow paths, air inlets, and outlets.

Electrical Connections

Check power connections and grounding for signs of overheating or looseness.

Motor Circuit

Inspect motor cables, insulation condition, grounding, and cable termination.

Network

Check EtherNet/IP connections, network status, and communication errors.

HIM

Use the local HIM to review faults, warnings, operating values, and configuration information.

Environment

Check for excessive dust, moisture, heat, or contamination.

Cabinet

Confirm that the cabinet ventilation system remains effective.

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32. Engineering Advantages of the Local HIM

The Enhanced LCD Full Numeric HIM is particularly useful in maintenance-intensive environments.

A technician can work directly with the drive rather than depending entirely on a remote control system.

This can be valuable when:

• The PLC is offline.
• The network is unavailable.
• A machine is being commissioned.
• Motor rotation needs to be checked.
• Parameters need to be verified.
• Fault information needs to be reviewed.
• Maintenance personnel need local access.

The local interface therefore complements the embedded network communication rather than replacing it.

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33. Braking Considerations

The 20G1ABD485JN2NNNNN has no dynamic braking in this catalog configuration.

This is suitable for applications where the mechanical load does not require significant controlled regenerative braking.

However, applications involving:

• High-inertia loads.
• Rapid deceleration.
• Vertical lifting.
• Hoists.
• Cranes.
• High-speed stopping.
• Frequent braking cycles.

may require a different braking arrangement.

The braking requirement should therefore be evaluated before the final drive selection.

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34. Environmental and Installation Considerations

The drive is intended for a controlled industrial environment.

Important environmental considerations include:

• Ambient temperature.
• Humidity.
• Altitude.
• Dust.
• Airflow.
• Cabinet temperature.
• Corrosive substances.
• Vibration.
• Electrical noise.

For installations at higher altitude, reduced cooling effectiveness should be considered.

For dusty environments, additional cabinet filtration or environmental protection may be required.

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35. Practical Selection Guide

Requirement	Recommended Choice
480 VAC system	20G1ABD485JN2NNNNN
Motor current around 485 A class	20G1ABD485JN2NNNNN
Up to approximately 450 HP LD	20G1ABD485JN2NNNNN
Up to approximately 400 HP ND	20G1ABD485JN2NNNNN
Up to approximately 350 HP HD	20G1ABD485JN2NNNNN
Local commissioning required	20G1ABD485JN2NNNNN
Embedded EtherNet/IP required	20G1ABD485JN2NNNNN
No dynamic braking required	20G1ABD485JN2NNNNN
Larger motor than 485 A class	Consider 20G1ABD545JN2NNNNN or higher-current models
Smaller motor than 485 A class	Consider 20G1ABD430JN2NNNNN

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36. Overall Product Advantages

The main advantages of the 20G1ABD485JN2NNNNN can be summarized as follows:

1. High 485 A current capacity for large industrial motors.
2. 450 HP Light Duty capability for high-power applications.
3. 400 HP Normal Duty capability for substantial continuous industrial loads.
4. 350 HP Heavy Duty capability for more demanding torque applications.
5. 480 VAC three-phase operation for common industrial electrical systems.
6. Frame 8 construction for high-power applications.
7. Forced-air cooling for thermal management.
8. Embedded EtherNet/IP for automation-system integration.
9. Enhanced LCD Full Numeric HIM for local commissioning and maintenance.
10. AC input with precharge for controlled DC-bus energization.
11. Filtered configuration with CM jumper installed.
12. Flexible application range covering pumps, fans, conveyors, compressors, mixers, and process equipment.
13. MCC-style construction suitable for large industrial electrical installations.
14. Local and network-based control capability for flexible system architecture.

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37. Final Technical Parameter Table

Parameter	20G1ABD485JN2NNNNN
Brand	Allen-Bradley
Product Family	PowerFlex 750-Series
Product Series	PowerFlex 755
Product Type	Air-Cooled AC Drive
Catalog Number	20G1ABD485JN2NNNNN
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 class
Frame	Frame 8
Cooling	Forced Air
Input Type	AC Input with Precharge
DC Terminals	None
Dynamic Braking	None
Filtering	Filtered
CM Jumper	Installed
Communication	Embedded EtherNet/IP
HIM	Enhanced LCD
HIM Display	Full Numeric
HIM Configuration	Handheld / Local
Enclosure	Type 1
Protection	IP20
Cabinet Style	600 mm Deep MCC Style
Approx. Height	~2100 mm
Approx. Width	~610 mm
Approx. Depth	~465 mm
Approx. Weight	~600–623 kg
Cooling Fan	Forced Air / Centrifugal
Approx. Airflow	~1805 m³/h
Approx. Fan Input	~0.45 kW
Typical Applications	Pumps, fans, conveyors, compressors, mixers, process machinery
Installation	Industrial Electrical Cabinet / MCC
Application Class	Large Industrial Motor Control

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38. Final Assessment

The 20G1ABD485JN2NNNNN is a high-power PowerFlex 755 AC drive designed for large industrial motor-control systems.

Its 485 A current rating, 480 VAC three-phase operation, Frame 8 construction, and approximately 450 HP Light Duty capability make it suitable for demanding industrial equipment.

The approximately 400 HP Normal Duty rating makes it a strong choice for large continuous-process equipment, while the approximately 350 HP Heavy Duty rating provides a practical selection point for applications with greater mechanical loading.

The embedded EtherNet/IP interface makes the drive well suited to PLC-based automation systems, while the Enhanced LCD Full Numeric handheld/local HIM provides technicians with convenient access during commissioning and maintenance.

The filtered input configuration, AC input with precharge, forced-air cooling, and large Frame 8 architecture provide the foundation required for high-power industrial operation.

The model is especially appropriate for large pumps, fans, conveyors, compressors, mixers, material-handling equipment, process machinery, mining equipment, manufacturing systems, and other applications where a high-current variable-frequency drive is required.

From a system-design perspective, the strongest feature of this model is the balance between high electrical capacity and practical control integration. It can operate as part of a centralized PLC/EtherNet/IP system while still providing local access through the Enhanced LCD HIM.

Because the drive is physically large and weighs approximately 600–623 kg, mechanical installation, ventilation, lifting, cabinet structure, and maintenance access must be included in the engineering plan.

For a 480 VAC motor application requiring approximately 485 A of drive capacity and local commissioning capability, the 20G1ABD485JN2NNNNN is a strong high-power PowerFlex 755 configuration.