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20DJ248A3NNNACGNE — Detailed Product Overview and Technical Guide

1. Product Introduction

The 20DJ248A3NNNACGNE is a high-power industrial AC drive belonging to the PowerFlex 700S, 20D series.

It is a 650 VDC-input, 248 A high-performance drive intended for large industrial motor applications where accurate speed control, substantial output current, controlled acceleration and integration with an industrial automation system are required.

The 20DJ248 rating is associated with a 200 HP normal-duty rating and a 150 HP heavy-duty rating. The drive is classified as a Frame 6 unit and uses a DC common-bus architecture. The published technical data also identifies 248 A continuous output, 273 A one-minute output and 372 A three-second output capability.

The important point about this model is that it is not simply a large-capacity general-purpose frequency converter.

The PowerFlex 700S platform was designed for higher-performance industrial applications where motor speed, torque response, machine coordination and control-system integration can be important.

The 20DJ248A3NNNACGNE is therefore a good fit for large conveyors, pumps, fans, blowers, process machinery, material-handling systems and other large rotating machines, provided that the motor and application requirements match the drive’s electrical ratings.

The A3 configuration should be treated as part of the complete catalog configuration rather than ignored.

For replacement work, the entire catalog number should be matched because the characters after the basic 20DJ248 rating can represent important hardware and option differences.

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2. Brand and Series

Category	Information
Brand	Allen-Bradley
Product family	PowerFlex
Product series	PowerFlex 700S
Catalog family	20D
Model	20DJ248A3NNNACGNE
Product type	High-performance AC drive
Input architecture	DC common-bus
Input voltage class	650 VDC
Output current class	248 A
Motor capacity	200 HP normal duty / 150 HP heavy duty
Mechanical frame	Frame 6
Drive category	High-power industrial variable frequency drive

The 20D catalog family covers PowerFlex 700S drives with advanced control capabilities.

The 20DJ group is the 650 VDC-input family.

The 248 A version sits in the larger-current portion of the family, above the 125 A, 156 A and 180 A models and below several of the larger 300 A and 385 A configurations.

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3. Basic Product Identification

Parameter	Specification
Model	20DJ248A3NNNACGNE
Brand	Allen-Bradley
Product family	PowerFlex
Series	PowerFlex 700S
Catalog series	20D
Product type	High-performance industrial AC drive
Input voltage class	650 VDC
Input configuration	DC common bus
Continuous output current	248 A
1-minute output current	273 A
3-second output current	372 A
Normal-duty rating	200 HP
Heavy-duty rating	150 HP
Normal-duty power	Approximately 132 kW
Heavy-duty power	Approximately 110 kW
Frame	Frame 6
PWM frequency	2 kHz class
Cooling	Forced air
Enclosure class	IP20 / NEMA Type 1 class
Application category	Large industrial motor control
Installation	Industrial cabinet / electrical enclosure

The published 650 VDC technical table identifies the 20DJ248 rating at 248 A continuous, 273 A for one minute and 372 A for three seconds, with 200 HP normal-duty and 150 HP heavy-duty ratings.

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4. Model Number Explanation

The complete catalog number is:

20DJ248A3NNNACGNE

The first part, 20D, identifies the PowerFlex 700S/20D family.

The J identifies the 650 VDC voltage class.

The 248 identifies the 248 A output-current class.

The remaining characters define the detailed configuration.

This is important because two drives can have the same basic current rating while having different options or hardware.

For example, the same 20DJ248 electrical rating can appear in different configurations depending on precharge, feedback, brake, filtering, control and other option selections.

The exact suffix therefore should not be treated as decorative catalog information.

For maintenance, procurement and replacement, the complete 20DJ248A3NNNACGNE number should be retained.

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5. Main Electrical Parameters

Electrical Parameter	Specification
Model	20DJ248A3NNNACGNE
Input voltage class	650 VDC
Continuous output current	248 A
One-minute output current	273 A
Three-second output current	372 A
Normal-duty motor rating	200 HP
Heavy-duty motor rating	150 HP
Normal-duty power	Approx. 132 kW
Heavy-duty power	Approx. 110 kW
DC input current	Approx. 272 A
PWM frequency	2 kHz class
Frame size	6
Cooling	Forced air
Motor type	Three-phase AC motor
Input architecture	DC common bus
Drive type	High-performance adjustable-frequency drive
Intended application	Large industrial motor control

The technical data lists 272 A DC input current, 248 A continuous output, 273 A one-minute output, 372 A three-second output and approximately 2115 W drive losses for the 20DJ248 configuration.

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6. Normal-Duty and Heavy-Duty Ratings

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

The 20DJ248 is rated approximately as follows:

Duty	Motor Rating	Approx. Metric Power
Normal Duty	200 HP	132 kW
Heavy Duty	150 HP	110 kW

A normal-duty application usually has a relatively predictable torque requirement.

A heavy-duty application can impose higher overload requirements during acceleration, loading or process changes.

For this reason, a 200 HP motor should not automatically be assumed to be suitable simply because the nameplate horsepower matches the normal-duty rating.

The motor’s full-load current and actual mechanical load should always be checked.

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7. Output Current and Overload Capability

The most important electrical characteristic of the 20DJ248 is its 248 A continuous output capability.

It also has short-duration overload capacity:

Output Rating	Current
Continuous	248 A
1 minute	273 A
3 seconds	372 A

This additional current capability is useful when a large motor needs additional torque during acceleration or a temporary load increase.

For example, a conveyor may require additional torque while starting with material already on the belt.

A process machine may also experience temporary torque peaks.

The drive’s short-term current capability provides additional operating margin for these situations.

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8. 650 VDC Input Architecture

The 20DJ248A3NNNACGNE belongs to the 650 VDC input group.

This is different from a conventional low-voltage AC-input VFD.

The drive is intended to work within a DC-bus architecture.

A common DC-bus system can be particularly useful when several drives operate together.

Instead of every drive operating as a completely independent AC-fed unit, the DC bus can form part of a shared power architecture.

This is useful in large production machines where several motors operate together.

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9. Common DC-Bus Applications

Common-bus architecture can be useful for:

• Multi-motor conveyors.
• Large production lines.
• Material-processing equipment.
• Winding and unwinding systems.
• Paper and converting machinery.
• Large machine tools.
• Coordinated industrial machinery.
• Multi-drive process systems.

The actual DC-bus design requires appropriate protection.

Fuse selection, disconnecting equipment, busbar design and grounding must be engineered for the complete system.

The technical documentation specifies DC-bus protection arrangements for this product family, so the DC input should not be treated like an ordinary low-voltage control connection.

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10. High-Performance Control

The PowerFlex 700S series was designed for applications that require more sophisticated motor control.

A basic VFD generally focuses on adjusting motor frequency and voltage.

A high-performance drive can provide much more sophisticated control of motor speed and torque.

This becomes important when machine performance depends directly on motor behavior.

Typical examples include:

• High-inertia machinery.
• Large conveyors.
• Coordinated process equipment.
• Material-handling systems.
• Large pumps.
• Large fans.
• Production machinery.

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11. Product Advantages

11.1 High Current Capacity

The 248 A continuous rating gives this drive considerable motor-control capacity.

It is suitable for large industrial motors where smaller drive models would not have sufficient output capability.

The 248 A model occupies an important position in the 650 VDC family.

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11.2 Large Motor Rating

The 200 HP normal-duty rating makes the drive suitable for large industrial motor applications.

The 150 HP heavy-duty rating also gives it a useful position for applications with higher torque demands.

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11.3 High Short-Term Current Capacity

The 372 A three-second rating is particularly useful for short acceleration or torque events.

This does not mean the motor should be operated continuously at 372 A.

It is a short-duration overload capability.

The drive should always be selected based on the continuous motor current and actual duty cycle.

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11.4 Common DC-Bus Architecture

The 650 VDC input makes the drive suitable for DC common-bus systems.

This can be useful in multi-drive installations.

It can also provide greater flexibility in systems where several motors exchange mechanical and electrical energy.

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11.5 High-Performance Motor Control

The PowerFlex 700S architecture provides more sophisticated motor-control capabilities than a basic VFD.

This is especially valuable when:

• Speed regulation matters.
• Torque response matters.
• Acceleration must be carefully controlled.
• Multiple motors must coordinate.
• The drive forms part of a larger automation system.

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11.6 Suitable for Large Industrial Machines

The 248 A capacity allows the drive to be used in substantial industrial equipment.

It is particularly appropriate for large machines where a compact general-purpose VFD would be undersized.

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12. Product Applications

12.1 Large Conveyors

Large conveyors are one of the strongest applications for this drive class.

A conveyor with a long belt can have substantial inertia.

The motor may also have to start while the belt is loaded.

A controlled acceleration profile can reduce mechanical shock.

This can help reduce stress on:

• Gearboxes.
• Couplings.
• Shafts.
• Bearings.
• Belts.
• Chains.
• Mechanical supports.

The 248 A capacity also provides sufficient electrical headroom for many large conveyor motors.

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13. Mining and Bulk Material Handling

The drive is well suited to large material-handling equipment.

Potential applications include:

• Mining conveyors.
• Aggregate handling.
• Ore transfer systems.
• Bulk material conveyors.
• Feed systems.
• Processing equipment.
• Large transfer machines.

Heavy-duty sizing should be considered carefully because bulk material handling can produce high starting torque and changing mechanical loads.

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14. Pump Applications

Large industrial pumps are another important application.

The motor can be operated at different speeds depending on process demand.

Potential applications include:

• Cooling-water systems.
• Industrial water circulation.
• Process-water systems.
• Water treatment.
• Large pumping stations.
• Industrial cooling systems.

Variable-speed operation can improve process control and, depending on the pump/system curve, can reduce energy consumption.

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15. Fan and Blower Applications

Large fans and blowers can also benefit from variable-speed operation.

Typical applications include:

• Industrial ventilation.
• Exhaust systems.
• Process-air systems.
• Cooling systems.
• Combustion-air systems.
• Dust collection.
• Large air-handling systems.

The drive can adjust motor speed according to airflow demand.

This can reduce unnecessary full-speed operation when the process does not require maximum airflow.

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16. Compressor Applications

The drive can be considered for large compressor applications when variable-speed compressor operation is permitted.

Compressor applications require more detailed engineering than ordinary fan or pump applications.

Important parameters include:

• Minimum speed.
• Maximum speed.
• Starting torque.
• Pressure range.
• Lubrication.
• Cooling.
• Compressor efficiency.
• Acceleration time.
• Process control requirements.

The drive rating alone does not determine whether it is suitable for a specific compressor.

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17. Process Machinery

The 20DJ248A3NNNACGNE can be applied to large process machines where motor speed is an important process variable.

Possible applications include:

• Mixers.
• Agitators.
• Rollers.
• Material-processing machinery.
• Winding equipment.
• Large production machines.
• Rotating process equipment.
• Industrial production lines.

The high-performance drive architecture is particularly useful where the motor cannot simply run at one fixed speed.

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18. High-Inertia Machinery

High-inertia applications require special attention.

Examples include:

• Large fans.
• Large rollers.
• Centrifuges.
• Flywheel systems.
• Large conveyors.
• Heavy rotating machinery.

During acceleration, the motor needs additional torque.

During deceleration, mechanical energy can return to the DC bus.

This makes braking analysis important.

A long controlled deceleration may be acceptable in one machine, while another machine may require rapid stopping.

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19. Braking Considerations

Braking should be evaluated carefully for the 20DJ248.

A large motor operating a high-inertia load can regenerate significant energy when its speed is reduced.

That energy can raise the DC-bus voltage.

Depending on the application, the system may require:

• Longer deceleration time.
• External braking equipment.
• Regenerative power handling.
• Mechanical braking.
• A different drive configuration.

The correct solution depends on:

• Motor speed.
• Load inertia.
• Required stopping time.
• Number of stops per hour.
• Load direction.
• Regenerative energy.

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20. Dimensions and Weight

The 20DJ248 is identified as a Frame 6 drive in the 650 VDC technical data.

For this exact 20DJ248A3NNNACGNE catalog configuration, the electrical rating can be identified confidently, but an exact mechanical drawing and exact assembled weight should be checked against the final hardware configuration.

This is particularly important because a drive’s complete installation can include:

• DC disconnects.
• Fuses.
• Busbars.
• Cooling equipment.
• Control components.
• Communication hardware.
• Cabinet structure.

The drive itself should therefore not be confused with the weight of the complete electrical cabinet.

Mechanical Parameter	Specification
Model	20DJ248A3NNNACGNE
Frame	Frame 6
Enclosure class	IP20 / NEMA Type 1 class
Installation	Industrial electrical cabinet
Height	Configuration-dependent; verify Frame 6 mechanical drawing
Width	Configuration-dependent; verify Frame 6 mechanical drawing
Depth	Configuration-dependent; verify Frame 6 mechanical drawing
Overall dimensions	Configuration-dependent
Cooling	Forced air
Service clearance	Required
Cable clearance	Required
Ventilation clearance	Required
Drive weight	Configuration-dependent
Weight (kg)	Verify exact assembled configuration
Cabinet weight	Not included
Shipping weight	Not included; verify packaged unit

The use of a configuration-dependent value here is intentional.

It is better to verify the exact mechanical drawing than to assign an unsupported weight to a specific catalog suffix.

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21. Detailed Technical Parameter Table

Parameter	Specification
Model	20DJ248A3NNNACGNE
Brand	Allen-Bradley
Product family	PowerFlex
Product series	PowerFlex 700S
Catalog family	20D
Product type	High-performance AC drive
Input voltage	650 VDC class
Input architecture	DC common bus
Continuous output	248 A
1-minute output	273 A
3-second output	372 A
Normal-duty rating	200 HP
Heavy-duty rating	150 HP
Normal-duty power	Approx. 132 kW
Heavy-duty power	Approx. 110 kW
DC input current	Approx. 272 A
PWM frequency	2 kHz class
Temperature rating	40 °C class
Frame	6
Cooling	Forced air
Drive power loss	Approx. 2115 W
Enclosure	IP20 / NEMA Type 1 class
Motor type	Three-phase AC
Application	Large industrial motor control
Dimensions	Configuration-dependent
Height	Verify exact mechanical drawing
Width	Verify exact mechanical drawing
Depth	Verify exact mechanical drawing
Weight (kg)	Configuration-dependent
Installation	Industrial cabinet

The 2115 W power-loss figure and the 650 VDC electrical ratings are identified in the technical data for the 20DJ248 configuration.

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22. Thermal Management

The approximately 2115 W drive loss is an important installation parameter.

More than 2 kW of heat can be significant in a closed electrical cabinet.

The cabinet designer therefore needs to consider:

• Ambient temperature.
• Cabinet volume.
• Heat dissipation.
• Forced-air cooling.
• Other equipment losses.
• Airflow direction.
• Filter condition.
• Installation altitude.

A drive can be electrically correctly sized but still suffer from excessive thermal stress if the cabinet cooling system is inadequate.

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23. Environmental Considerations

The drive should be installed in an environment appropriate for an IP20/NEMA Type 1 industrial drive arrangement.

It should be protected against:

• Water.
• Condensation.
• Excessive dust.
• Conductive particles.
• Corrosive gases.
• Chemical contamination.
• Excessive heat.
• Excessive vibration.

For harsh industrial environments, the drive should normally be installed inside a properly engineered cabinet.

The cabinet may require filtration, ventilation or air-conditioning depending on the application.

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24. Motor Selection

The motor should be matched to the drive using current and duty requirements.

Motor Parameter	Why It Matters
Rated voltage	Must match the electrical system
Full-load current	Main drive-sizing parameter
Motor horsepower	Confirms approximate capacity
Rated frequency	Required for motor control
Rated speed	Determines speed range
Power factor	Important for electrical loading
Efficiency	Affects system performance
Service factor	Affects allowable motor loading
Starting torque	Important for acceleration
Breakdown torque	Important for heavy loads
Insulation system	Important for inverter operation
Cooling method	Important at low speed
Encoder	Required where feedback control is used

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25. Installation Requirements

Installation Item	Importance
DC-bus voltage verification	Critical
DC-bus protection	Critical
Fuse selection	Critical
Disconnecting equipment	Critical
Motor cable sizing	Critical
Grounding	Critical
Cabinet cooling	Critical
Ambient temperature	Important
Motor parameters	Critical
Braking analysis	Critical for high-inertia loads
Feedback hardware	Important where used
Communications	Important
Service clearance	Required
Parameter backup	Recommended
Mechanical support	Required

The 20DJ248 technical data identifies approximately 272 A DC input current for the 650 VDC configuration, so the upstream DC-bus system must be designed accordingly.

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26. Maintenance

A large industrial drive should be included in a preventive-maintenance program.

Recommended maintenance activities include:

• Inspect cooling fans.
• Check ventilation paths.
• Inspect electrical connections.
• Check DC-bus connections.
• Inspect motor cables.
• Review fault history.
• Check control wiring.
• Check communication connections.
• Inspect for overheating.
• Check cabinet contamination.
• Maintain parameter backups.
• Record installed options.
• Record the complete catalog number.

For an older machine, documenting the exact catalog number is especially useful.

A parameter backup can significantly reduce downtime if the drive must be replaced.

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27. Replacement Considerations

The 20DJ248A3NNNACGNE should not be replaced solely by matching the 200 HP rating.

The following items should be checked:

Replacement Parameter	Importance
Complete catalog number	Critical
650 VDC input	Critical
248 A continuous current	Critical
Normal-duty rating	Critical
Heavy-duty rating	Critical
Frame size	Important
DC-bus architecture	Critical
Feedback configuration	Critical if used
Communications	Critical
Braking	Critical
Cabinet dimensions	Critical
Cooling	Critical
Motor parameters	Critical
Installed options	Critical
Application duty	Critical

A different drive can have the same horsepower rating but still be unsuitable because its voltage class, control architecture, current rating or mechanical arrangement is different.

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28. Five Same-Series or Closely Related Models

The following models are useful when comparing the 20DJ248A3NNNACGNE with other 650 VDC 20D-series drives.

Model	Series	Continuous Current	1-Minute Current	3-Second Current	Normal Duty	Heavy Duty	Frame	Dimensions	Weight (kg)
20DJ125A0ENNANAN	PowerFlex 700S / 20D	125 A	138 A	163 A	100 HP	75 HP	5	Frame 5; verify drawing	Configuration-dependent
20DJ156A0ENNANAN	PowerFlex 700S / 20D	156 A	172 A	233 A	125 HP	100 HP	6	Frame 6; verify drawing	Configuration-dependent
20DJ180A0ENNANAN	PowerFlex 700S / 20D	180 A	198 A	270 A	150 HP	125 HP	6	Frame 6; verify drawing	Configuration-dependent
20DJ248A0ENNANAN	PowerFlex 700S / 20D	248 A	273 A	372 A	200 HP	150 HP	6	Frame 6; verify drawing	Configuration-dependent
20DJ261A0ENNANAN	PowerFlex 700S / 20D	261 A	287 A	410 A	200 HP	150 HP	9	Frame 9; verify drawing	Configuration-dependent

The published 650 VDC rating table confirms the 20DJ125, 20DJ156, 20DJ180 and 20DJ248 ratings and shows the progression toward the larger 261 A configuration.

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29. Same-Series Capacity Comparison

Model	Continuous Current	Normal Duty	Heavy Duty	Frame	Relative Capacity
20DJ125	125 A	100 HP	75 HP	5	Lower
20DJ156	156 A	125 HP	100 HP	6	Lower
20DJ180	180 A	150 HP	125 HP	6	Lower
20DJ248	248 A	200 HP	150 HP	6	Reference
20DJ261	261 A	200 HP	150 HP	9	Slightly higher current
20DJ300	300 A	250 HP	200 HP	9	Higher
20DJ385	385 A	300 HP	250 HP	10	Much higher

This makes the 20DJ248 a useful middle-to-high capacity option within the 650 VDC PowerFlex 700S family.

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30. Five Related Models for Selection

Model	Current Class	Normal Duty	Heavy Duty	Approx. Power Class	Frame	Typical Use	Dimensions	Weight (kg)
20DJ125	125 A	100 HP	75 HP	75 kW	5	Medium-large motor	Frame 5; verify	Configuration-dependent
20DJ156	156 A	125 HP	100 HP	90 kW	6	Large pump/conveyor	Frame 6; verify	Configuration-dependent
20DJ180	180 A	150 HP	125 HP	110 kW	6	Large industrial machinery	Frame 6; verify	Configuration-dependent
20DJ248	248 A	200 HP	150 HP	132 kW	6	Large industrial motor	Frame 6; verify	Configuration-dependent
20DJ300	300 A	250 HP	200 HP	160 kW	9	Heavy industrial equipment	Frame 9; verify	Configuration-dependent

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31. Five Related Models from the Same Brand

For broader comparison, the following models represent other drive configurations that may be considered depending on application requirements.

Model	Product Family	Typical Capacity	Control Level	Typical Application	Dimensions	Weight (kg)
20DD248A0ENNANANE	PowerFlex 700S / 20D	248 A / 200 HP class	High performance	Large industrial machinery	Frame 6; verify	Configuration-dependent
20DJ180A0ENNANANE	PowerFlex 700S / 20D	180 A / 150 HP class	High performance	Pumps, fans, conveyors	Frame 6; verify	Configuration-dependent
20DJ300A0ENNBNANE	PowerFlex 700S / 20D	300 A / 250 HP class	High performance	Heavy industrial machinery	Frame 9; verify	Configuration-dependent
20F11FD065AA0NNNNN	PowerFlex 753	65 A class	Advanced general-purpose	Pumps, fans, conveyors	Frame-dependent	Configuration-dependent
20G11RD011AA0NNNNN	PowerFlex 755	11 A class	Advanced	Machine and process control	Frame-dependent	Configuration-dependent

These are comparison products rather than direct substitutes.

The 20DD248 is particularly close in current capacity, while the 753 and 755 families represent different product architectures and should be selected according to the actual machine requirements.

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32. Application Suitability

Application	Suitability	Reason
Large conveyor	Excellent	High current and controlled acceleration
Mining conveyor	Excellent	High-power motor capability
Bulk material handling	Excellent	Large variable-speed motor
Large pump	Excellent	Variable-speed process control
Large fan	Excellent	High-power speed regulation
Large blower	Excellent	Adjustable motor speed
Compressor	Good	Requires compressor-specific review
Mixer	Good	Suitable for high-power motor loads
Process machinery	Excellent	High-performance control
High-inertia machine	Good	Requires braking analysis
Hoist	Requires engineering	Braking and load control are critical
Small pump	Poor	Drive is oversized
Small fan	Poor	Drive is oversized
Servo positioning	Not primary choice	Servo system generally more appropriate

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33. Conveyor Application

For large conveyor systems, the 20DJ248 can provide controlled acceleration and speed adjustment.

This is useful where a machine must start smoothly.

A conveyor carrying heavy material can have significant inertia.

Starting too aggressively can produce excessive mechanical stress.

With appropriate acceleration settings, the drive can bring the motor up to operating speed gradually.

This can help reduce stress on the gearbox, coupling, belt and conveyor structure.

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34. Pump Application

For large pumps, variable-speed control can provide useful process flexibility.

The pump can run at different speeds according to process requirements.

Possible control variables include:

• Pressure.
• Flow.
• Tank level.
• Cooling demand.
• Process load.

The energy-saving potential depends on the actual hydraulic system, but variable-speed control can often provide a more flexible operating range than a fixed-speed motor.

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35. Fan and Blower Application

Large fans and blowers are well suited to variable-speed operation.

The drive can adjust airflow by changing motor speed.

This can provide:

• Better process control.
• Smoother startup.
• Adjustable airflow.
• Potential energy savings.
• Reduced mechanical stress.

Large industrial ventilation and process-air systems are therefore suitable applications.

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36. Process Machine Application

The 20DJ248 is also useful in process machinery where motor speed is directly connected to production conditions.

Examples include:

• Large mixers.
• Rollers.
• Material processors.
• Winding systems.
• Production machinery.
• Large rotating equipment.

In these applications, the drive can form an important part of the machine’s overall control architecture.

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37. High-Inertia Load Considerations

High-inertia loads should be analyzed carefully.

During acceleration, the drive must supply additional motor torque.

During deceleration, the mechanical system can return energy to the DC bus.

This means the application should be evaluated for:

• Acceleration time.
• Deceleration time.
• Maximum motor speed.
• Load inertia.
• Number of starts/stops.
• Regenerative energy.
• Braking method.

The 248 A rating alone does not determine whether the drive is suitable for a particular high-inertia application.

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38. Cabinet Design

A Frame 6 high-power drive requires appropriate cabinet space.

The cabinet should provide adequate room for:

• DC input connections.
• Motor output connections.
• Control wiring.
• Communication wiring.
• Grounding.
• Cooling airflow.
• Service access.
• Protective devices.

The thermal calculation is particularly important because the drive itself can produce approximately 2115 W of heat under the published rating conditions.

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39. Cooling and Ventilation

The approximately 2115 W power loss means that cabinet cooling cannot be overlooked.

The actual thermal design should consider:

Thermal Factor	Importance
Drive heat loss	Critical
Ambient temperature	Critical
Cabinet volume	Important
Other heat sources	Important
Fan capacity	Critical
Airflow path	Critical
Filter condition	Important
Installation altitude	Important
Duty cycle	Important

A cabinet with insufficient cooling can cause the drive to operate at elevated temperatures for extended periods.

That can increase component stress and reduce service life.

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40. Maintenance Recommendations

A practical maintenance schedule should include:

1. Inspect cooling fans.
2. Check cabinet ventilation.
3. Inspect power connections.
4. Check DC-bus connections.
5. Inspect motor terminals.
6. Review fault history.
7. Check control wiring.
8. Inspect communication connections.
9. Check for overheating.
10. Inspect the cabinet for dust or contamination.
11. Maintain parameter backups.
12. Record the complete catalog number.
13. Record all installed option cards.
14. Keep critical replacement information available.

For legacy industrial machinery, good documentation can be just as important as having a spare drive.

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41. Replacement Checklist

Check	Requirement
Exact catalog number	Match
Voltage class	650 VDC
Continuous current	248 A class
Normal-duty rating	200 HP
Heavy-duty rating	150 HP
Frame	6
DC-bus system	Must be compatible
Control architecture	Must be compatible
Feedback	Verify
Communication	Verify
Braking	Verify
Cabinet dimensions	Verify
Cooling	Verify
Motor parameters	Verify
Software/parameter backup	Recommended
Installed options	Verify

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42. Five Same-Series Models — Quick Reference

Model	Current	Normal Duty	Heavy Duty	Frame	Approx. Power	Dimensions	Weight (kg)
20DJ125	125 A	100 HP	75 HP	5	75 kW	Frame 5; verify drawing	Configuration-dependent
20DJ156	156 A	125 HP	100 HP	6	90 kW	Frame 6; verify drawing	Configuration-dependent
20DJ180	180 A	150 HP	125 HP	6	110 kW	Frame 6; verify drawing	Configuration-dependent
20DJ248	248 A	200 HP	150 HP	6	132 kW	Frame 6; verify drawing	Configuration-dependent
20DJ300	300 A	250 HP	200 HP	9	160 kW	Frame 9; verify drawing	Configuration-dependent

The 20DJ248 is therefore positioned between the 180 A and 300 A configurations in terms of application capacity.

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43. Overall Advantages and Limitations

Category	Assessment
Output current	Excellent
Motor capacity	Excellent
Overload capability	Excellent
Common DC-bus operation	Excellent
High-performance control	Excellent
Conveyor applications	Excellent
Pump applications	Excellent
Fan applications	Excellent
Process machinery	Excellent
High-inertia loads	Good, with braking analysis
Small machines	Poor choice
Simple applications	Usually oversized
Cabinet requirements	Significant
Cooling requirements	Significant
Replacement flexibility	Requires detailed catalog comparison
New-project suitability	Requires lifecycle evaluation

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44. Final Product Assessment

The 20DJ248A3NNNACGNE is a high-capacity industrial drive designed around a 650 VDC common-bus architecture.

Its key rating is 248 A continuous output, with 273 A for one minute and 372 A for three seconds.

The drive provides approximately 200 HP normal-duty capacity and 150 HP heavy-duty capacity.

The drive’s Frame 6 construction places it in the larger physical size range of the 20D family.

It is therefore intended for substantial industrial equipment rather than compact machinery.

Its main technical strengths are its large output-current capability, high short-term overload capability, 650 VDC common-bus architecture and high-performance PowerFlex 700S control platform.

The drive is especially well suited to large conveyors, pumps, fans, blowers, material-handling systems, process machinery and other large rotating equipment.

For conveyor applications, controlled acceleration can reduce mechanical shock.

For pump and fan applications, variable-speed operation can improve process control and may reduce energy consumption when the hydraulic or airflow system is designed appropriately.

For multi-drive machinery, the DC common-bus architecture can provide a practical power arrangement for coordinated drives.

The approximately 2115 W drive loss also needs to be considered carefully when designing the electrical cabinet and cooling system.

The closest same-series alternatives include the 20DJ125, 20DJ156, 20DJ180, 20DJ261 and 20DJ300 configurations.

The smaller models are useful when the motor current is below the 248 A range, while the larger models become relevant when additional current or horsepower capacity is required.

For a replacement application, however, the complete catalog number must be considered.

The suffix A3NNNACGNE should not be ignored because the exact configuration can affect compatibility.

The motor’s nameplate current, voltage, duty classification, feedback arrangement, braking requirements, communication system and cabinet dimensions should all be checked before substitution.

The dimensions and final weight of the complete 20DJ248A3NNNACGNE assembly should likewise be confirmed from the exact mechanical configuration.

This is preferable to using a generic Frame 6 dimension or weight and assuming that every configuration is mechanically identical.

Overall, the 20DJ248A3NNNACGNE is best described as a large industrial, high-performance, 650 VDC common-bus AC drive in the PowerFlex 700S 20D family, rated at 248 A and approximately 200 HP normal duty.

It is most appropriate where the machine requires substantial motor capacity, controlled acceleration, high-performance drive control and an industrial DC-bus architecture.

For an existing installation, preserving the complete catalog number and documenting all installed options is highly recommended.

For a new installation, the drive should be evaluated against the actual motor current, duty cycle, braking requirements, cabinet cooling, mechanical space and long-term maintenance requirements rather than being selected from horsepower alone.