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Allen-Bradley 20P41AE067RA0NNN PowerFlex DC Drive

1. Product Overview

The Allen-Bradley 20P41AE067RA0NNN is a high-power regenerative DC drive in the PowerFlex DC family, designed for industrial motor-control systems requiring controlled speed, torque, braking, reversing, and regenerative operation.

This particular configuration is designed for the 500–600 VAC class, with a three-phase AC input and a 67.5 A DC output rating. Its standard motor rating is 50 HP, approximately 37 kW, placing it in the medium-power range of the PowerFlex DC regenerative product family.

The drive uses four-quadrant regenerative operation, which makes it suitable for machinery where the motor must operate in both forward and reverse directions and where controlled regeneration is required during braking or overhauling conditions.

The catalog configuration includes an IP20, NEMA/UL Type Open enclosure with conformal coating, a blank-plate/no-HIM arrangement, a user manual, and no standard communication module.

With its Frame B construction, the 20P41AE067RA0NNN provides a relatively compact physical package for a 50 HP-class regenerative DC drive. The published Frame B dimensions are approximately 311 mm high × 388 mm wide × 350 mm deep, and the drive weight is approximately 25.5 kg.

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2. Brand and Product Series

Item	Specification
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex DC
Model / Catalog Number	20P41AE067RA0NNN
Product Type	Regenerative DC Drive
Motor Control Type	DC Motor Control
Voltage Class	500–600 VAC
Nominal Input Class	600 VAC
Input Phase	Three Phase
Output Current	67.5 A
Motor Rating	50 HP
Motor Power	Approximately 37 kW
Frame Size	Frame B
Input Type	6 Pulse
Motor Operation	Four Quadrant / Regenerative
Field Supply	Single Phase Regulated
Enclosure	IP20
Enclosure Type	NEMA/UL Type Open
Conformal Coating	Yes
HIM	Blank Plate / No HIM
Communication Module	None
Approx. Dimensions	311 × 388 × 350 mm
Approx. Weight	25.5 kg

The 20P41AE067RA0NNN belongs to the PowerFlex DC series. The technical selection data identifies this catalog number as a 67.5 A, 50 HP regenerative drive in Frame B for the 500–600 VAC class.

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3. Main Technical Parameters

Parameter	Specification
Model / Catalog Number	20P41AE067RA0NNN
Brand	Allen-Bradley
Series	PowerFlex DC
Drive Type	Regenerative DC Drive
Input Voltage Class	500–600 VAC
Nominal Input Voltage	600 VAC
Input Phase	Three Phase
Input Type	6 Pulse
Output Current	67.5 A
Motor Rating	50 HP
Motor Rating	Approximately 37 kW
Motor Operation	Four Quadrant Operation – Regenerative
Field Supply	Single Phase Regulated
Frame Size	Frame B
Enclosure Rating	IP20
Enclosure Style	NEMA/UL Type Open
Conformal Coating	Yes
HIM	No HIM / Blank Plate
Communication Module	No Communication Module
Documentation	User Manual
Approx. Height	311 mm
Approx. Width	388 mm
Approx. Depth	350 mm
Approx. Weight	25.5 kg
Approx. Packaged Weight	27.5 kg
Mounting	Industrial Control Cabinet
Application Class	Medium-Power DC Motor Control

The core electrical data identifies the drive as a 600 VAC, three-phase, 67.5 A, 50 HP PowerFlex DC drive with six-pulse input and four-quadrant regenerative operation.

The 37 kW motor rating corresponds to the 50 HP class shown in the PowerFlex DC selection information.

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4. Product Identification

The complete catalog number is:

20P41AE067RA0NNN

For industrial purchasing and replacement work, the complete catalog number should be retained.

The complete number is more useful than referring to the product only as a “PowerFlex DC 67 A drive,” because the complete catalog number identifies the particular voltage class and option configuration.

This is especially important when replacing an existing drive because PowerFlex DC products are available in multiple voltage ranges, current ratings, frame sizes, regenerative configurations, and accessory arrangements.

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5. Product Series – PowerFlex DC

The 20P41AE067RA0NNN belongs to the PowerFlex DC series.

The PowerFlex DC family is designed for applications that use DC motors and require electronic control of armature power, field excitation, speed, torque, acceleration, deceleration, and braking.

The family includes both regenerative and non-regenerative configurations across a broad range of voltage and current ratings.

The 20P41AE067RA0NNN is specifically a regenerative configuration, identified by its 20P41 catalog structure.

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6. 600 VAC Three-Phase Input

One of the defining characteristics of the 20P41AE067RA0NNN is its high-voltage AC input class.

The product description specifies:

600 VAC, three phase

The technical selection information places the model in the 500–600 VAC three-phase drive group, commonly associated with a 575/600 V industrial supply class.

This voltage class makes the drive suitable for industrial electrical systems where the available supply is substantially higher than the common 380–480 VAC class.

When designing a new installation, the actual plant supply voltage should always be checked against the drive requirements rather than selecting the drive based only on the nominal voltage printed on a machine specification.

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7. 67.5 Amp Output

The 20P41AE067RA0NNN has a rated output current of 67.5 A.

This is a substantial increase over the smaller PowerFlex DC models used for small machine motors.

The 67.5 A rating allows the drive to control motors in the 50 HP class, subject to the actual motor armature voltage, armature current, duty cycle, field requirements, and application conditions.

Current rating is particularly important when replacing an existing DC drive.

A replacement should not be selected from horsepower alone. The actual motor armature current and operating conditions should be checked carefully.

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8. 50 HP / 37 kW Motor Rating

The drive is rated for a 50 HP motor, equivalent to approximately 37 kW.

This places the 20P41AE067RA0NNN in a useful range for medium-sized industrial machinery.

Motor Rating	Equivalent Value
Model / Catalog Number	20P41AE067RA0NNN
Horsepower	50 HP
Approx. Metric Power	37 kW
Output Current	67.5 A
Voltage Class	500–600 VAC
Drive Type	Regenerative DC
Frame	B

The 50 HP / 37 kW rating is listed in the PowerFlex DC selection data for this exact catalog number.

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9. Four-Quadrant Regenerative Operation

The most important functional feature of this model is its four-quadrant regenerative operation.

A conventional motor-control system may primarily be concerned with delivering power to the motor.

A four-quadrant regenerative drive can also manage situations where the motor becomes a generator.

This allows the motor to operate in:

1. Forward motoring.
2. Forward regeneration.
3. Reverse motoring.
4. Reverse regeneration.

This type of operation is valuable for machinery that repeatedly accelerates, decelerates, reverses direction, or handles an overhauling mechanical load.

The 20P41AE067RA0NNN is specifically identified as a four-quadrant regenerative PowerFlex DC drive.

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10. Regenerative Braking

Regenerative braking is particularly useful in machinery with frequent deceleration.

When a motor decelerates, mechanical energy can be transferred back through the motor into the electrical system.

The regenerative drive manages this operating condition electronically.

This is different from simply relying on mechanical friction or a basic braking method.

For industrial machinery, regenerative operation can be valuable when the machine needs:

• Fast controlled deceleration.
• Repeated stopping.
• Frequent reversing.
• Controlled overhauling loads.
• Bidirectional operation.
• Controlled tension.
• Energy regeneration.

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11. Six-Pulse Input

The 20P41AE067RA0NNN uses a six-pulse input configuration.

Six-pulse converter architecture is a well-established topology in industrial DC drive systems.

For the 20P41AE067RA0NNN, this configuration is associated with the three-phase AC input and controlled DC output required by the motor system.

When designing the complete electrical system, the input power system, harmonics, line impedance, protective equipment, grounding, and any required input components should be considered as part of the overall installation.

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12. Frame B Construction

The 20P41AE067RA0NNN uses Frame B construction.

Frame size is important because it provides a convenient way to understand the approximate mechanical envelope of the drive.

For this model, the published Frame B dimensions are approximately:

311 mm × 388 mm × 350 mm

The published Frame B weight for the 575 V / 67 A rating code is approximately 25.5 kg, with a packaged weight of approximately 27.5 kg.

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13. Dimensions and Weight

Mechanical Parameter	Specification
Model / Catalog Number	20P41AE067RA0NNN
Frame Size	B
Height	Approx. 311 mm
Width	Approx. 388 mm
Depth	Approx. 350 mm
Approx. Drive Weight	25.5 kg
Approx. Packaged Weight	27.5 kg
Mounting	Panel / Cabinet
Enclosure	IP20 / Open Type
Installation	Industrial Electrical Cabinet

The Frame B dimensional information gives a main envelope of approximately 311 mm high, 388 mm wide, and 350 mm deep. The weight table identifies the 575 V / 067 rating at 25.5 kg, with packaging bringing the total to approximately 27.5 kg.

The dimensions should be used as product-selection information rather than as the complete cabinet design dimensions. Additional space is normally required for cable routing, ventilation, terminal access, service access, and other panel components.

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14. IP20 / NEMA/UL Type Open Enclosure

The 20P41AE067RA0NNN uses an IP20, NEMA/UL Type Open enclosure configuration.

This means the drive is intended to be incorporated into an appropriate electrical cabinet or enclosure.

The drive itself should not be considered a weatherproof or outdoor enclosure.

The surrounding cabinet therefore needs to provide suitable protection against environmental conditions such as dust, moisture, conductive contamination, accidental contact, and other hazards associated with the installation.

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15. Conformal-Coated Construction

This catalog configuration includes conformal coating.

Conformal coating is useful in industrial environments because it adds protection to electronic assemblies against certain forms of environmental contamination.

This can be particularly relevant for industrial installations where the control cabinet is located near production machinery, process equipment, or environments with elevated humidity or airborne contaminants.

Conformal coating does not mean that the drive can be installed without an enclosure.

The complete environmental protection strategy still depends on the cabinet, installation location, ventilation system, sealing, and maintenance practices.

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16. Regulated Field Supply

The product specification identifies the field supply as Single Phase Regulated.

The field supply is an important part of a DC motor-control system.

A separately excited DC motor can require controlled field excitation in addition to controlled armature power.

When selecting the drive for a retrofit, the motor nameplate should therefore be checked for:

• Armature voltage.
• Armature current.
• Field voltage.
• Field current.
• Motor speed.
• Feedback device.
• Duty cycle.

These parameters are often more important than the horsepower number alone.

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17. No HIM / Blank Plate Configuration

The 20P41AE067RA0NNN is supplied in a No HIM / Blank Plate configuration.

This configuration can be useful when the drive is intended to be integrated into a larger automated machine.

Instead of depending on a local operator interface, the machine may use external controls, PLC logic, analog references, digital inputs, or other automation equipment.

This arrangement can also provide a cleaner control-panel appearance.

For maintenance purposes, however, the machine documentation should clearly identify how the drive is commanded, monitored, and configured.

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18. No Standard Communication Module

The catalog configuration specifies no communication module.

This means that the base configuration does not include an additional communication module as part of the cataloged product.

In an automated machine, external control architecture can therefore be designed around the available drive I/O and any required communication or interface options.

The exact control architecture should be confirmed before purchasing additional hardware.

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19. Main Product Applications

The 20P41AE067RA0NNN is suitable for medium-power industrial DC motor applications where regenerative control is required.

Typical applications include:

• Large conveyors.
• Winding machines.
• Unwinding machines.
• Paper-processing equipment.
• Printing machinery.
• Metal-processing equipment.
• Material-handling machinery.
• Hoisting-related applications.
• Tension-control systems.
• Large machine tools.
• Process machinery.
• Test equipment.
• Reversing machinery.
• High-inertia machinery.
• DC motor retrofit projects.

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20. Winding Machines

Winding machines often require precise coordination between motor speed, torque, and material tension.

A regenerative DC drive can be useful because the motor may alternate between motoring and braking conditions during normal operation.

The 50 HP capacity of the 20P41AE067RA0NNN makes it more appropriate for medium-sized winding systems than the small 2–10 HP PowerFlex DC configurations.

Applications can include wire winding, cable processing, paper winding, film handling, textile equipment, and other continuous-material processes.

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21. Unwinding Applications

Unwinding systems frequently involve mechanical loads that can drive the motor.

During controlled deceleration, the motor can move into a regenerative operating condition.

The four-quadrant functionality of the 20P41AE067RA0NNN makes this type of application a natural fit for the product family.

The actual suitability depends on the required torque, speed range, reel diameter, material tension, motor specifications, and machine inertia.

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22. Tension-Control Systems

Tension control is another important application area.

In continuous material-processing equipment, the motor may need to maintain controlled torque while material is pulled through the production line.

The drive can form part of a larger closed-loop control system in which the machine controller provides speed or torque references.

The regenerative capability becomes particularly useful when the machine needs to transition smoothly between acceleration, steady operation, and braking.

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23. Paper and Converting Machinery

Paper-processing and converting machinery can contain multiple motorized sections.

Some sections may require:

• Speed synchronization.
• Controlled acceleration.
• Controlled deceleration.
• Tension regulation.
• Reversing.
• Regenerative braking.

A 50 HP regenerative DC drive can therefore be considered for medium-sized paper and converting equipment where an existing DC motor remains in service.

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24. Metal-Processing Equipment

Metal-processing machines can involve relatively high motor loads and significant inertia.

Examples include:

• Strip processing.
• Small rolling systems.
• Payoff equipment.
• Recoilers.
• Material handling.
• Tension-control equipment.
• Processing lines.

Where a DC motor is already installed, the 20P41AE067RA0NNN can be considered as part of a drive modernization strategy.

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25. Large Conveyor Systems

Conveyor systems with high inertia can require more sophisticated acceleration and deceleration control than simple motor starters.

The regenerative architecture can be useful when the conveyor needs controlled braking.

For a 50 HP motor, the 20P41AE067RA0NNN provides a significantly higher power range than the small PowerFlex DC models.

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26. High-Inertia Machinery

High-inertia machinery can be difficult to stop quickly without controlled braking.

A regenerative DC drive can manage the transition between motoring and braking conditions.

Typical examples include large rotating equipment, reels, rollers, flywheel-type systems, and machinery with substantial rotating mass.

The actual braking requirements should always be calculated according to the mechanical system.

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27. DC Motor Retrofit Applications

The 20P41AE067RA0NNN can be particularly relevant to modernization projects where an existing 50 HP-class DC motor is still mechanically suitable.

Replacing only the drive can sometimes be less disruptive than replacing the motor, gearbox, mechanical couplings, wiring, and other machine components at the same time.

Before performing a retrofit, the existing motor should be checked carefully.

Important information includes:

Motor Information	Why It Matters
Armature Voltage	Must match the drive system
Armature Current	Must be compatible with drive current
Field Voltage	Must match field-supply requirements
Field Current	Must remain within drive capability
Rated Speed	Determines operating range
Feedback Type	Determines speed/position feedback compatibility
Duty Cycle	Determines thermal requirements
Mechanical Load	Determines torque requirements
Acceleration	Determines dynamic requirements
Deceleration	Determines regenerative requirements

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28. Main Advantages of the 20P41AE067RA0NNN

28.1 50 HP Power Rating

The 50 HP rating provides a useful capacity for medium-sized industrial DC motor systems.

28.2 67.5 A Output

The 67.5 A current rating provides sufficient capacity for the corresponding 50 HP class motor application.

28.3 Four-Quadrant Operation

Four-quadrant regenerative control allows the motor to move between motoring and regenerative operating conditions.

28.4 High-Voltage Industrial Input

The 500–600 VAC class makes this model suitable for higher-voltage industrial electrical systems.

28.5 Frame B Mechanical Design

Frame B provides a relatively compact package compared with the larger high-current PowerFlex DC configurations.

28.6 Conformal Coating

The conformal-coated construction provides additional protection for the electronic assemblies in appropriate industrial environments.

28.7 DC Motor Retrofit Capability

The drive can be considered for modernization projects where an existing DC motor remains mechanically and electrically suitable.

28.8 Suitable for Reversing Applications

The four-quadrant architecture is particularly useful for applications where forward and reverse operation are required.

28.9 Suitable for Regenerative Loads

Machines with frequent braking or overhauling conditions can benefit from regenerative operation.

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29. Recommended Same-Series Models

The following models are closely related PowerFlex DC regenerative models in the same 500–600 VAC product group.

Model / Catalog Number	Voltage Class	Output Current	Motor Rating	Approx. Power	Frame	Drive Type
20P41AE101RA0NNN	500–600 VAC	101.3 A	75 HP	56 kW	B	Regenerative DC
20P41AE135RA0NNN	500–600 VAC	135 A	100 HP	75 kW	B	Regenerative DC
20P41AE270RA0NNN	500–600 VAC	270 A	200 HP	149 kW	B	Regenerative DC
20P41AE405RA0NNN	500–600 VAC	405 A	300 HP	224 kW	B	Regenerative DC
20P41AE540RA0NNN	500–600 VAC	540 A	400 HP	298 kW	C	Regenerative DC

The PowerFlex DC selection information identifies these models as regenerative drives in the same 500–600 V class. The 67.5 A model is the 50 HP version, followed by 75 HP, 100 HP, 200 HP, 300 HP, and 400 HP configurations.

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30. Same-Series Model Parameters Including Dimensions and Weight

Model / Catalog Number	Motor Rating	Current	Frame	Approx. Dimensions	Approx. Drive Weight
20P41AE067RA0NNN	50 HP / 37 kW	67.5 A	B	311 × 388 × 350 mm	25.5 kg
20P41AE101RA0NNN	75 HP / 56 kW	101.3 A	B	311 × 388 × 350 mm	25.5 kg
20P41AE135RA0NNN	100 HP / 75 kW	135 A	B	311 × 388 × 350 mm	25.5 kg
20P41AE270RA0NNN	200 HP / 149 kW	270 A	B	311 × 388 × 350 mm	29.5 kg
20P41AE405RA0NNN	300 HP / 224 kW	405 A	B	311 × 388 × 350 mm	32 kg
20P41AE540RA0NNN	400 HP / 298 kW	540 A	C	521 × 511 × 416 mm	Approx. 72 kg

The Frame B dimensional envelope is approximately 311 × 388 × 350 mm. The published weight table assigns 25.5 kg to the group containing the 575 V 067, 101 and 135 rating codes, 29.5 kg to the 270 rating group, and 32 kg to the 405 rating group. The 540 rating moves into Frame C, whose published dimensions are approximately 521 × 511 × 416 mm.

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31. Comparison of the Five Closely Related Models

Model	HP	kW	Current	Frame	Typical Selection Position
20P41AE067RA0NNN	50 HP	37 kW	67.5 A	B	Base 50 HP option
20P41AE101RA0NNN	75 HP	56 kW	101.3 A	B	Higher motor capacity
20P41AE135RA0NNN	100 HP	75 kW	135 A	B	100 HP class
20P41AE270RA0NNN	200 HP	149 kW	270 A	B	High-power industrial
20P41AE405RA0NNN	300 HP	224 kW	405 A	B	Large industrial machinery

These models provide a convenient progression when selecting a larger motor capacity within the same regenerative DC product family.

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32. Five Popular Related Models From the Same Brand

The following five products are related Allen-Bradley PowerFlex products from other drive families.

They are useful for comparison, but they should not be treated as direct replacements for the 20P41AE067RA0NNN.

The 20P41AE067RA0NNN is a regenerative DC drive, while the models below are primarily AC variable-frequency drives intended for AC motor applications.

Model / Catalog Number	Series	Drive Type	Voltage Class	Approx. Current Class	Approx. Motor Class	Dimensions / Weight
25B-D017N114	PowerFlex 525	AC Variable Frequency Drive	480 VAC class	17 A	10 HP class	Configuration-dependent
25B-D030N114	PowerFlex 525	AC Variable Frequency Drive	480 VAC class	30 A	15 HP class	Configuration-dependent
20G11ND077AA0NNNNN	PowerFlex 755	AC Variable Frequency Drive	480 VAC class	77 A	50 HP class	Configuration-dependent
20G11ND156AA0NNNNN	PowerFlex 755	AC Variable Frequency Drive	480 VAC class	156 A	100 HP class	Configuration-dependent
22F-D060N103	PowerFlex 4M	Compact AC Drive	480 VAC class	6 A class	3 HP class	Configuration-dependent

These models are best considered when designing a new AC motor system or converting an existing machine from DC motor technology to AC variable-frequency control.

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33. Same-Brand Product Comparison

Model	Product Family	Motor Type	Typical Application	Regenerative DC Operation
20P41AE067RA0NNN	PowerFlex DC	DC Motor	Medium-power DC machinery	Yes
25B-D017N114	PowerFlex 525	AC Motor	General-purpose machinery	No direct DC regeneration
25B-D030N114	PowerFlex 525	AC Motor	Conveyors and machinery	No direct DC regeneration
20G11ND077AA0NNNNN	PowerFlex 755	AC Motor	Larger industrial machinery	Different architecture
20G11ND156AA0NNNNN	PowerFlex 755	AC Motor	High-power industrial equipment	Different architecture
22F-D060N103	PowerFlex 4M	AC Motor	Compact machinery	Different architecture

The important distinction is motor technology.

The 20P41AE067RA0NNN is intended for a DC motor system, while the related PowerFlex AC products are intended for AC motor systems.

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34. When to Choose the 20P41AE067RA0NNN

The 20P41AE067RA0NNN is a particularly relevant choice when the application has the following characteristics:

• Existing DC motor.
• Approximately 50 HP motor rating.
• 500–600 VAC class input supply.
• Three-phase industrial power.
• Need for regenerative operation.
• Need for forward and reverse operation.
• Frequent acceleration and deceleration.
• Significant mechanical inertia.
• Overhauling load.
• Tension-control requirements.
• Existing DC drive infrastructure.
• Retrofit project where replacing the motor is undesirable.

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35. When a Different PowerFlex DC Model May Be More Appropriate

If the motor requires less than 67.5 A, a smaller PowerFlex DC model may be more economical and physically smaller.

For example, the 50 HP 67.5 A model should not automatically be selected for a motor that requires only 20 A.

Conversely, if the motor requires more than 67.5 A, a higher-current model such as the 101.3 A, 135 A, 270 A, or 405 A configuration may be more appropriate.

The actual motor current should therefore be the primary electrical selection criterion.

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36. Installation Considerations

The drive should be installed inside an appropriately designed electrical enclosure.

Because the enclosure configuration is IP20 / NEMA/UL Type Open, the surrounding cabinet must provide the environmental protection required by the application.

The cabinet should also account for:

• Drive heat dissipation.
• Ambient temperature.
• Air circulation.
• Cable routing.
• Motor cable separation.
• Feedback cable routing.
• Control wiring.
• Grounding.
• Maintenance access.
• Power-disconnect equipment.
• Protective devices.
• Clearance around the drive.

The drive’s dimensions of approximately 311 × 388 × 350 mm should therefore not be interpreted as the required total cabinet dimensions.

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37. Thermal Management

Thermal management is particularly important in a 50 HP-class drive.

The cabinet designer should consider the heat generated by the drive together with heat from:

• Contactors.
• Transformers.
• Power supplies.
• PLCs.
• Circuit breakers.
• Line reactors.
• Other drives.
• Braking equipment.

The final enclosure temperature must remain within the permitted operating conditions.

A cabinet that is physically large enough to contain the drive may still be thermally unsuitable if heat removal is inadequate.

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38. Power Wiring

The high-current DC output requires appropriately sized motor wiring.

The complete power circuit should consider:

• AC input conductors.
• DC armature conductors.
• Field wiring.
• Protective grounding.
• Disconnect equipment.
• Input protection.
• Motor protection.
• Cable length.
• Environmental conditions.
• Applicable electrical regulations.

The exact conductor size and protective-device selection should be determined from the installation requirements and actual operating conditions rather than from the drive horsepower alone.

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39. Feedback and Control

Industrial DC motor systems often use feedback to improve speed regulation.

Depending on the machine design, feedback can involve tachometer or encoder signals.

For a high-performance application, feedback selection should be considered at the beginning of the project rather than added after the machine has been commissioned.

Feedback wiring should also be routed carefully to minimize electrical interference from high-current power cables.

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40. Maintenance Considerations

A drive of this type should be maintained as part of the complete motor-control system.

Maintenance personnel should keep records of:

• Catalog number.
• Motor nameplate data.
• Drive parameters.
• Firmware information.
• Feedback-device information.
• Field-supply settings.
• Control wiring.
• Alarm history.
• Motor operating current.
• Machine duty cycle.
• Replacement history.

This information can make troubleshooting considerably easier.

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41. Spare-Parts Management

The full catalog number should be recorded in the plant’s spare-parts system:

20P41AE067RA0NNN

It is also useful to record the following information alongside the catalog number:

Spare-Part Information	Recommended Record
Catalog Number	20P41AE067RA0NNN
Series	PowerFlex DC
Voltage Class	500–600 VAC
Current	67.5 A
Motor Rating	50 HP / 37 kW
Frame	B
Drive Type	Regenerative
Enclosure	IP20 / Open
Weight	25.5 kg
Approx. Dimensions	311 × 388 × 350 mm
Application	Machine-specific
Installed Location	Machine-specific

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42. Product Advantages for Industrial Retrofits

For an existing DC motor installation, the 20P41AE067RA0NNN can provide an opportunity to update the drive-control portion of the machine while retaining a compatible motor and mechanical system.

This can be particularly useful when the mechanical portion of the machine is still in good condition.

A drive retrofit may involve less mechanical modification than a complete DC-to-AC conversion.

However, the decision should be based on the condition and specifications of the existing motor, not simply the availability of the drive.

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43. 20P41AE067RA0NNN vs. Smaller DC Drives

The 20P41AE067RA0NNN is significantly larger in electrical capacity than the small PowerFlex DC models.

Feature	Small PowerFlex DC	20P41AE067RA0NNN
Motor Range	Small machinery	50 HP class
Output Current	Low current	67.5 A
Voltage Class	Multiple options	500–600 VAC
Frame	Small frame possible	B
Regeneration	Available in 20P41 family	Yes
Typical Machinery	Small machines	Medium industrial machinery
Approx. Weight	Lower	25.5 kg
Dimensions	Smaller models vary	Approx. 311 × 388 × 350 mm

This makes the target model better suited to medium-power DC applications than the smaller 2–20 HP configurations.

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44. 20P41AE067RA0NNN vs. Larger DC Drives

The model also sits below several larger PowerFlex DC configurations.

For example, the same voltage family includes 75 HP, 100 HP, 200 HP, 300 HP, and 400 HP regenerative versions.

This gives machine designers a relatively straightforward method of selecting a higher current rating when a larger DC motor is required.

The main limitation is that higher-power models can move into larger frame sizes and substantially increase cabinet requirements.

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45. Recommended Selection Table

Application Requirement	Suggested PowerFlex DC Model
Around 50 HP DC motor	20P41AE067RA0NNN
Around 75 HP DC motor	20P41AE101RA0NNN
Around 100 HP DC motor	20P41AE135RA0NNN
Around 200 HP DC motor	20P41AE270RA0NNN
Around 300 HP DC motor	20P41AE405RA0NNN
Around 400 HP DC motor	20P41AE540RA0NNN

The electrical ratings for these configurations follow the PowerFlex DC selection data for the 500–600 VAC regenerative drive family.

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46. Five Same-Series Recommendations

20P41AE101RA0NNN

This is the next larger configuration above the target model, rated at approximately 101.3 A and 75 HP / 56 kW, with Frame B construction.

20P41AE135RA0NNN

This version increases the capacity to approximately 135 A and 100 HP / 75 kW, remaining within the Frame B family.

20P41AE270RA0NNN

This is a significantly higher-capacity configuration rated at approximately 270 A and 200 HP / 149 kW.

20P41AE405RA0NNN

The 405 A model provides approximately 300 HP / 224 kW capacity and remains within the Frame B group.

20P41AE540RA0NNN

This model moves into the 400 HP / 298 kW class and uses Frame C construction, making it substantially larger than the target model.

The published technical data confirms these current and power relationships.

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47. Five Related Popular Models

For new machine designs, the following models are useful alternatives to investigate when an AC motor is being considered:

Model	Series	Typical Motor Type	Typical Use
25B-D017N114	PowerFlex 525	AC Motor	General industrial machinery
25B-D030N114	PowerFlex 525	AC Motor	Conveyors and production machinery
20G11ND077AA0NNNNN	PowerFlex 755	AC Motor	Medium/high-power machinery
20G11ND156AA0NNNNN	PowerFlex 755	AC Motor	Large industrial machinery
22F-D060N103	PowerFlex 4M	AC Motor	Compact variable-speed applications

These products should be selected according to the requirements of the AC motor system and should not be considered drop-in replacements for the DC regenerative 20P41AE067RA0NNN.

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48. Complete Product Specification Table

Specification	20P41AE067RA0NNN
Brand	Allen-Bradley
Product Family	PowerFlex
Series	PowerFlex DC
Product Type	Regenerative DC Drive
Input Voltage	600 VAC class
Input Voltage Group	500–600 VAC
Input Phase	Three Phase
Input Type	6 Pulse
Output Current	67.5 A
Motor Rating	50 HP
Motor Power	Approximately 37 kW
Motor Operation	Four Quadrant / Regenerative
Field Supply	Single Phase Regulated
Frame	B
Enclosure	IP20
Enclosure Type	NEMA/UL Type Open
Conformal Coating	Yes
HIM	Blank Plate / No HIM
Communication Module	None
Documentation	User Manual
Approx. Height	311 mm
Approx. Width	388 mm
Approx. Depth	350 mm
Approx. Drive Weight	25.5 kg
Approx. Packaged Weight	27.5 kg
Installation	Electrical Cabinet
Primary Application	Industrial DC Motor Control
Regenerative Braking	Yes
Bidirectional Operation	Yes
Suitable for Retrofit	Yes, subject to motor compatibility

The core product information, including 600 VAC input, 67.5 A current, 50 HP rating, IP20 open enclosure, six-pulse input, regulated field supply, and four-quadrant regenerative operation, is specified for this catalog configuration.

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49. Main Advantages at a Glance

Advantage	Description
Model / Catalog Number	20P41AE067RA0NNN
50 HP Capacity	Suitable for medium-power DC motor systems
67.5 A Output	Provides substantial armature current capacity
Regenerative	Supports controlled regenerative operation
Four Quadrant	Supports forward/reverse motoring and regeneration
600 VAC Class	Suitable for higher-voltage industrial power systems
Frame B	Practical medium-size mechanical package
Conformal Coating	Additional protection for electronics
IP20	Suitable for cabinet integration
DC Motor Retrofit	Useful for compatible existing DC motors
37 kW Class	Suitable for medium industrial machinery

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50. Product Position in the PowerFlex DC Family

The 20P41AE067RA0NNN occupies a useful position within the PowerFlex DC family.

It is substantially larger than small 2 HP, 3 HP, 5 HP, and 10 HP DC drives, while remaining below the very large 100 HP, 200 HP, 300 HP, and 400 HP configurations.

Its 50 HP / 67.5 A rating makes it appropriate for medium-sized machinery.

The Frame B mechanical construction also provides a useful balance between electrical capacity and physical size.

For an existing 50 HP-class DC motor operating from a 500–600 VAC supply, the model is therefore a natural catalog configuration to investigate.

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51. Practical Application Example – Winding Line

Consider a medium-sized winding machine with a 50 HP DC motor.

The machine requires controlled acceleration as the reel begins to rotate.

During normal operation, the motor maintains the required production speed.

When the machine decelerates, the mechanical energy stored in the rotating reel causes the motor to move toward regeneration.

The four-quadrant capability of the 20P41AE067RA0NNN allows the drive to manage these operating transitions.

This type of operating profile demonstrates why a regenerative DC drive can be more suitable than a simple motor controller for machines with frequent speed changes.

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52. Practical Application Example – Reversing Machinery

Another application is a reversing machine.

The motor may operate forward for one process step and then reverse for the next.

The drive must control the motor through acceleration, steady operation, deceleration, and reverse acceleration.

The four-quadrant architecture is particularly useful in this situation because the machine can move between motoring and regenerative operating states.

The 67.5 A capacity provides the electrical range needed for a 50 HP-class motor, subject to actual motor nameplate current and application conditions.

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53. Practical Application Example – Material Handling

For a medium-power conveyor or material-handling system, the drive can provide controlled starting and stopping.

If the conveyor has substantial inertia, controlled regenerative braking can reduce the need to rely entirely on mechanical braking.

For an overhauling load, regenerative operation can become especially important.

The actual mechanical system should be analyzed to determine braking torque, stopping time, motor thermal requirements, and regenerative energy.

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54. Practical Application Example – DC Motor Modernization

A factory may have an older 50 HP DC motor connected to an aging DC drive.

If the motor, bearings, mechanical transmission, and feedback components remain suitable, a drive replacement can potentially modernize the control system without replacing the entire mechanical installation.

The 20P41AE067RA0NNN is well suited to this type of evaluation because it provides a 50 HP-class regenerative DC configuration.

The motor’s nameplate and existing control architecture should be reviewed before the replacement is approved.

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55. Final Technical Summary

The Allen-Bradley 20P41AE067RA0NNN is a PowerFlex DC regenerative drive designed for 500–600 VAC three-phase industrial power systems.

Its principal rating is 67.5 A, with a corresponding 50 HP / approximately 37 kW motor rating. It uses Frame B construction and provides four-quadrant regenerative operation.

The drive is configured with six-pulse input, a regulated single-phase field supply, IP20/NEMA/UL Type Open construction, conformal coating, a blank-plate/no-HIM configuration, and no standard communication module.

Its approximate physical dimensions are 311 × 388 × 350 mm, while the drive weight is approximately 25.5 kg and the packaged weight is approximately 27.5 kg.

The main functional advantage of this model is its combination of medium-power DC motor capacity and four-quadrant regenerative control.

That combination makes it suitable for machinery where controlled braking, reversing, tension control, acceleration, deceleration, and overhauling-load operation are important.

Typical applications include winding equipment, unwind systems, paper machinery, converting equipment, metal-processing machinery, medium conveyors, material-handling systems, reversing machinery, high-inertia equipment, and DC motor retrofit projects.

For applications requiring a larger motor, the same PowerFlex DC voltage family provides higher-capacity configurations such as 20P41AE101RA0NNN, 20P41AE135RA0NNN, 20P41AE270RA0NNN, 20P41AE405RA0NNN, and 20P41AE540RA0NNN.

For new machine designs where an AC motor is preferred, related products such as PowerFlex 525, PowerFlex 755, and PowerFlex 4M models can be considered, but these belong to different AC-drive architectures and should not be treated as direct replacements for a regenerative DC drive.

Overall, the 20P41AE067RA0NNN can be described as a 50 HP, 67.5 A, 500–600 VAC, three-phase, Frame B, four-quadrant regenerative PowerFlex DC drive intended for medium-power industrial DC motor control.

Its combination of regenerative capability, high-voltage input, 67.5 A output, 50 HP motor capacity, conformal-coated construction, and relatively compact Frame B mechanical design makes it particularly relevant to industrial DC motor applications where controlled bidirectional operation and regenerative braking are required.