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Allen-Bradley 20G11RD3P4AA0NNNNN PowerFlex 755 AC Drive

1. Product Overview

The 20G11RD3P4AA0NNNNN is an industrial AC variable frequency drive from the PowerFlex 755 series.

It is designed for three-phase AC motor speed control in industrial automation systems where stable motor operation, adjustable speed, network communication, controlled acceleration and deceleration, and advanced drive functions are required.

This model is a 480 VAC, three-phase, 3.4 A drive with a 2 HP normal-duty rating and a 1.5 HP heavy-duty rating when used in the Frame 1 configuration.

The drive uses an IP20 open-type Frame 1 enclosure, air cooling, integrated EtherNet/IP communication, an internal dynamic-braking transistor, EMC filtering, DC terminals, and a blank configuration without a local HIM keypad.

Because of its relatively compact Frame 1 construction, the drive is suitable for smaller industrial machines where the motor rating is modest but the control system requires more advanced functionality than a basic variable-speed drive.

The product is particularly appropriate for conveyors, pumps, fans, feeders, packaging equipment, material-handling machines, process machinery and other automated equipment using small three-phase motors.

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2. Brand and Product Series

Item	Specification
Brand	Allen-Bradley
Product family	PowerFlex
Product series	PowerFlex 755
Series group	PowerFlex 750-Series
Product type	AC Variable Frequency Drive
Drive category	Industrial AC drive
Cooling method	Air cooled / forced air
Frame	Frame 1
Enclosure	IP20
Enclosure type	Open Type
Input	Three-phase AC
Communication	Embedded EtherNet/IP
Local operator interface	Blank / No HIM
Dynamic braking	Internal DB transistor
EMC filtering	Included
DC terminals	Included

The PowerFlex 755 series is positioned as a flexible industrial drive platform for applications where motor control, communications, diagnostics, programming flexibility and optional functionality are important.

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3. Model Number

20G11RD3P4AA0NNNNN

The model number identifies a particular PowerFlex 755 configuration.

The important characteristics represented by this configuration include the 480 VAC class, three-phase input, 3.4 A output rating, Frame 1 construction, filtered configuration, dynamic-braking transistor, embedded EtherNet/IP and no local HIM.

For purchasing, replacement or engineering documentation, the complete catalog number should be retained rather than shortening it to “20G11” or “PowerFlex 755,” because different suffixes can represent significantly different electrical and mechanical configurations.

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4. Main Technical Specifications

Parameter	Specification
Model	20G11RD3P4AA0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product type	AC Variable Frequency Drive
Voltage class	480 VAC
Input voltage range	380–480 VAC class
Input phase	3-phase
Output phase	3-phase
Continuous output current	3.4 A
1-minute overload current	Approx. 3.7 A
3-second overload current	Approx. 5.1 A
Normal-duty rating	2 HP
Normal-duty power	Approx. 1.5 kW
Heavy-duty rating	1.5 HP
Heavy-duty power	Approx. 1.1 kW
Frame size	Frame 1
Enclosure	IP20
Enclosure type	Open Type
Cooling	Air cooled / forced air
Input configuration	AC input with DC terminals
DC terminals	Yes
Dynamic braking transistor	Yes
EMC filtering	Yes
Common-mode configuration	CM jumper removed
Communication	Embedded EtherNet/IP
HIM	Blank / No HIM
PID control	Supported
Integrated motion function	No
Safety functions	Supported through appropriate configuration/options
Approx. height	400 mm
Approx. width	190 mm
Approx. depth	211.1 mm
Approx. dimensions	400 × 190 × 211.1 mm
Approx. weight (kg)	6 kg
Operating temperature	Approx. -20 to +60 °C class
Storage temperature	Approx. -40 to +70 °C class
Mounting	Vertical cabinet mounting
Typical motor application	Small three-phase industrial motor

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5. Electrical Characteristics

The drive is designed for a 380–480 VAC class three-phase power supply, with a nominal voltage class of 480 VAC.

Its continuous output current is approximately 3.4 A.

The normal-duty rating is approximately 2 HP, equivalent to approximately 1.5 kW.

For heavy-duty operation, the rating is approximately 1.5 HP, or approximately 1.1 kW.

The difference between normal-duty and heavy-duty ratings is important when selecting the drive for a real machine.

A motor should not be selected only according to horsepower.

The motor’s actual full-load current, operating cycle, acceleration requirements, mechanical load and overload requirements should also be considered.

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6. Current Rating

The basic current characteristics can be summarized as follows.

Current Characteristic	Approximate Value
Continuous output current	3.4 A
1-minute overload current	Approx. 3.7 A
3-second overload current	Approx. 5.1 A
Normal-duty motor rating	2 HP
Heavy-duty motor rating	1.5 HP

The 3.4 A continuous rating makes the drive suitable for a wide range of smaller industrial motors.

For proper engineering selection, the motor nameplate current should be compared with the drive’s applicable current rating.

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7. Normal-Duty Rating

The normal-duty rating is approximately:

2 HP / 1.5 kW

Normal-duty operation is appropriate for applications where the motor does not continuously operate under severe overload conditions.

Typical examples include:

• Small conveyors
• Small fans
• Light-duty pumps
• Rollers
• Feed mechanisms
• Packaging equipment
• Small material-handling systems
• Auxiliary machinery
• Light process equipment

The 2 HP normal-duty rating gives the drive a useful capacity for compact industrial machines.

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8. Heavy-Duty Rating

The heavy-duty rating is approximately:

1.5 HP / 1.1 kW

Heavy-duty operation is generally associated with applications involving higher torque demand, frequent acceleration and deceleration, or more demanding overload conditions.

Potential applications include:

• Higher-inertia conveyors
• Frequent start/stop machines
• Material-handling mechanisms
• Feed systems
• Machinery with repeated acceleration
• Equipment requiring controlled deceleration

The heavy-duty rating should always be evaluated together with the actual motor current and load profile.

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9. Physical Dimensions and Weight

The drive is a Frame 1 product.

Its approximate physical dimensions are:

400 mm high × 190 mm wide × 211.1 mm deep

The approximate product weight is:

6 kg

These dimensions are the drive’s approximate physical envelope and should not be treated as the total cabinet space required.

Additional cabinet space should be allowed for:

• Power cables
• Motor cables
• Control wiring
• Network cables
• Grounding
• Ventilation
• Maintenance
• Terminal access

Mechanical Parameter	Specification
Model	20G11RD3P4AA0NNNNN
Frame	Frame 1
Height	Approx. 400 mm
Width	Approx. 190 mm
Depth	Approx. 211.1 mm
Dimensions	Approx. 400 × 190 × 211.1 mm
Height	Approx. 15.75 in
Width	Approx. 7.48 in
Depth	Approx. 8.31 in
Weight (kg)	Approx. 6 kg
Enclosure	IP20
Mounting orientation	Vertical
Cooling	Forced-air cooled

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10. IP20 Open-Type Construction

The drive uses an IP20 open-type enclosure.

This construction is intended for installation inside a suitable electrical cabinet or protected enclosure.

It is not intended to be treated as a standalone weatherproof product.

The installation should protect the drive from:

• Water
• Excessive dust
• Conductive contamination
• Corrosive chemicals
• Excessive humidity
• Mechanical damage
• Uncontrolled temperature
• Foreign objects

A properly designed cabinet should also provide sufficient ventilation.

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11. Embedded EtherNet/IP

One of the major advantages of this model is its embedded EtherNet/IP communication capability.

The drive can be integrated into an industrial automation network and controlled by a central controller.

The controller can typically exchange information such as:

Controller to Drive	Drive to Controller
Start command	Running status
Stop command	Actual speed
Speed reference	Output current
Direction command	Drive status
Reset command	Warning status
Control reference	Fault status
Operating parameters	Diagnostic information

This can significantly reduce the amount of hardwired control wiring required in an automated machine.

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12. No-HIM Configuration

The 20G11RD3P4AA0NNNNN is configured without a local HIM.

HIM means Human Interface Module.

This configuration is useful when the drive is intended to be controlled remotely through:

• PLC
• EtherNet/IP
• Remote HMI
• Supervisory control system
• Machine control software
• Central operator station

The no-HIM configuration can also be useful when the drive is installed inside a control cabinet and local keypad operation is not required.

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13. Dynamic-Braking Transistor

The drive includes a dynamic-braking transistor.

Dynamic braking is useful when the motor needs to decelerate more quickly or more predictably than simple coast-to-stop operation.

During deceleration, the motor can return energy to the drive’s DC bus.

A suitable braking resistor can dissipate this energy.

This function can be useful in:

• Conveyors
• Rollers
• Feed mechanisms
• Material-handling systems
• High-inertia loads
• Machines with frequent stopping
• Applications requiring controlled deceleration

The braking resistor must be selected according to the machine’s actual inertia, braking frequency and braking time.

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14. EMC Filtering

The model includes EMC filtering.

This helps control electromagnetic interference generated by the drive and motor system.

EMC considerations become particularly important when the control cabinet contains:

• PLCs
• Network equipment
• Sensors
• Measurement devices
• Other drives
• Communication modules
• Sensitive electronic equipment

Correct grounding, motor-cable routing and shielding remain important even when filtering is included.

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15. PID Control

The PowerFlex 755 platform supports PID control.

PID control can automatically adjust motor speed according to a process feedback signal.

For example, in a small pumping system:

Pressure below target → motor speed increases

Pressure reaches target → motor speed stabilizes

Pressure above target → motor speed decreases

This makes the drive useful for:

• Pressure control
• Flow control
• Ventilation
• Circulation
• Process control
• Pumping applications

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16. Product Applications

16.1 Conveyor Systems

The drive is well suited to smaller industrial conveyor systems.

It can provide:

• Variable speed
• Controlled acceleration
• Controlled deceleration
• Start/stop control
• Direction control
• Network control
• Fault monitoring

A conveyor can therefore operate at different speeds depending on production requirements.

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16.2 Pump Systems

The drive can be used with small industrial pumps.

Typical applications include:

• Water circulation
• Cooling systems
• Process-fluid circulation
• Transfer pumps
• Pressure systems
• Auxiliary pump systems

PID functionality can be particularly useful when pressure or flow feedback is available.

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16.3 Fan and Blower Systems

Small fans and blowers can benefit from adjustable motor speed.

Applications can include:

• Machine ventilation
• Equipment cooling
• Cabinet cooling
• Small exhaust systems
• Process air

Variable-speed control allows the machine to provide only the airflow required by the process.

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16.4 Packaging Equipment

The drive can be used for smaller packaging machines.

Possible functions include:

• Product feed
• Rollers
• Small conveyors
• Material transfer
• Feed mechanisms
• Auxiliary rotating equipment

The network interface can allow the drive to coordinate with the rest of the packaging machine.

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16.5 Material Handling

The drive can control small material-handling mechanisms.

Examples include:

• Rollers
• Transfer conveyors
• Feeders
• Small lifting mechanisms
• Product-handling systems

Controlled acceleration and deceleration can help reduce mechanical shock.

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16.6 Feeders

Feed systems frequently require adjustable speed.

The drive can receive a speed reference from the main controller and adjust the motor speed according to production requirements.

This can be useful for:

• Product feeders
• Material feeders
• Packaging feeders
• Process feeders
• Transfer mechanisms

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17. Main Product Advantages

17.1 2 HP Normal-Duty Capacity

The 2 HP normal-duty rating provides a useful capacity range for small industrial motors.

It can cover many applications that are too demanding for very small compact drives while remaining physically compact.

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17.2 3.4 A Continuous Output

The 3.4 A output rating provides a suitable current capacity for many small three-phase motors.

It also gives the machine designer a greater margin than a very low-current drive.

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17.3 Advanced PowerFlex 755 Platform

The main advantage is not simply the horsepower rating.

The drive combines a relatively small motor capacity with advanced industrial functions.

These include:

• Network communication
• Diagnostics
• PID control
• Dynamic braking
• Flexible configuration
• Optional functionality
• Centralized control

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17.4 Embedded EtherNet/IP

The built-in network interface makes the drive suitable for modern automated equipment.

It can reduce hardwired control requirements and make operating data easier to access.

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17.5 Dynamic Braking

The internal braking transistor provides additional flexibility for machines that need controlled deceleration.

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17.6 Compact Frame 1 Design

The Frame 1 package provides a relatively compact solution for a 2 HP class drive.

This is beneficial when panel space is limited.

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17.7 PID Functionality

PID capability expands the drive beyond simple motor speed control.

It can be used for pressure, flow and process-related applications.

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17.8 EMC Filtering

Integrated filtering helps support cleaner electrical operation in industrial control environments.

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17.9 No-HIM Architecture

The no-HIM configuration is suitable for centralized automation systems.

It avoids the need for a permanent local keypad when operation is performed through a PLC or remote HMI.

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18. Detailed Parameter Table

Category	Parameter	Specification
Identification	Model	20G11RD3P4AA0NNNNN
Identification	Brand	Allen-Bradley
Identification	Series	PowerFlex 755
Identification	Product family	PowerFlex 750-Series
Product	Type	AC Variable Frequency Drive
Electrical	Voltage class	480 VAC
Electrical	Input voltage	380–480 VAC class
Electrical	Input phase	3-phase
Electrical	Output phase	3-phase
Electrical	Continuous current	3.4 A
Electrical	1-minute current	Approx. 3.7 A
Electrical	3-second current	Approx. 5.1 A
Electrical	Normal-duty	2 HP
Electrical	Normal-duty power	Approx. 1.5 kW
Electrical	Heavy-duty	1.5 HP
Electrical	Heavy-duty power	Approx. 1.1 kW
Mechanical	Frame	Frame 1
Mechanical	Enclosure	IP20
Mechanical	Enclosure type	Open Type
Cooling	Cooling method	Forced air
Communication	Network	Embedded EtherNet/IP
Interface	HIM	Blank / No HIM
Braking	Dynamic braking transistor	Yes
Filtering	EMC filter	Yes
Filtering	CM jumper	Removed
Control	PID	Supported
Terminals	DC terminals	Yes
Safety	Safety capability	Available through suitable configuration/options
Dimensions	Height	Approx. 400 mm
Dimensions	Width	Approx. 190 mm
Dimensions	Depth	Approx. 211.1 mm
Dimensions	Overall size	Approx. 400 × 190 × 211.1 mm
Weight	Weight (kg)	Approx. 6 kg
Environment	Operating temperature	Approx. -20 to +60 °C class
Environment	Storage temperature	Approx. -40 to +70 °C class
Mounting	Installation	Vertical cabinet mounting
Main use	Motor type	Three-phase AC motor
Typical load	Conveyor	Yes
Typical load	Pump	Yes
Typical load	Fan	Yes
Typical load	Feeder	Yes
Typical load	Packaging equipment	Yes

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19. Five Same-Series or Closely Related Models

The following models are suitable candidates when selecting another configuration within the same PowerFlex 755 family.

Model	Series	Voltage Class	Output Current	Normal-Duty	Heavy-Duty	Frame	Enclosure	Approx. Dimensions	Weight (kg)
20G11RD2P1AA0NNNNN	PowerFlex 755	480 VAC	2.1 A	1 HP	0.5 HP	1	IP20	400 × 190 × 211.1 mm	Approx. 6
20G11RD3P4JA0NNNNN	PowerFlex 755	480 VAC	3.4 A	2 HP	1.5 HP	1	IP20	Approx. 400 × 190 × 211.1 mm	Approx. 6
20G11RD5P0AA0NNNNN	PowerFlex 755	480 VAC	5.0 A	3 HP	2 HP	1	IP20	Frame 1 class	Approx. 6
20G11RD8P0AA0NNNNN	PowerFlex 755	480 VAC	8.0 A	5 HP	3 HP	1	IP20	Frame 1 class	Approx. 6
20G11RD011AA0NNNNN	PowerFlex 755	480 VAC	11 A	7.5 HP	5 HP	1	IP20	Frame 1 class	Approx. 6

The 20G11RD3P4JA0NNNNN is the closest same-current alternative because it retains the 3.4 A / 2 HP class while using a different configuration suffix.

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20. Same-Series Model Comparison

Parameter	20G11RD2P1AA0NNNNN	20G11RD3P4AA0NNNNN	20G11RD3P4JA0NNNNN	20G11RD5P0AA0NNNNN	20G11RD8P0AA0NNNNN	20G11RD011AA0NNNNN
Series	PF755	PF755	PF755	PF755	PF755	PF755
Voltage	480 VAC	480 VAC	480 VAC	480 VAC	480 VAC	480 VAC
Current	2.1 A	3.4 A	3.4 A	5 A	8 A	11 A
Normal-duty	1 HP	2 HP	2 HP	3 HP	5 HP	7.5 HP
Heavy-duty	0.5 HP	1.5 HP	1.5 HP	2 HP	3 HP	5 HP
Frame	1	1	1	1	1	1
Enclosure	IP20	IP20	IP20	IP20	IP20	IP20
EtherNet/IP	Yes	Yes	Yes	Yes	Yes	Yes
PID	Yes	Yes	Yes	Yes	Yes	Yes
DB transistor	Yes	Yes	Yes	Yes	Yes	Yes
Air cooling	Yes	Yes	Yes	Yes	Yes	Yes
Approx. dimensions	400 × 190 × 211.1 mm	400 × 190 × 211.1 mm	400 × 190 × 211.1 mm	Frame 1 class	Frame 1 class	Frame 1 class
Weight (kg)	Approx. 6	Approx. 6	Approx. 6	Approx. 6	Approx. 6	Approx. 6

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21. Recommended Same-Series Models by Motor Size

Application Motor Size	Recommended Model	Current Class	Duty Rating
Around 1 HP	20G11RD2P1AA0NNNNN	2.1 A	1 HP ND
Around 2 HP	20G11RD3P4AA0NNNNN	3.4 A	2 HP ND
Around 2 HP alternative	20G11RD3P4JA0NNNNN	3.4 A	2 HP ND
Around 3 HP	20G11RD5P0AA0NNNNN	5.0 A	3 HP ND
Around 5 HP	20G11RD8P0AA0NNNNN	8.0 A	5 HP ND
Around 7.5 HP	20G11RD011AA0NNNNN	11 A	7.5 HP ND

The motor’s actual nameplate current should always be used for final selection.

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22. Five Popular Related Models from the Same Brand

For applications where the full PowerFlex 755 architecture is not necessary, smaller drive families can be considered.

The following are representative related models from the same brand and are useful for comparison.

Model	Series	Voltage Class	Approx. Current	Typical Power Class	Main Application	Approx. Dimensions	Weight (kg)
25B-D2P3N104	PowerFlex 525	480 VAC class	2.3 A	0.75 kW class	Small machines	Approx. 200 × 90 × 180 mm	Approx. 2
25B-D4P0N104	PowerFlex 525	480 VAC class	4.0 A	1.5 kW class	Conveyors / pumps	Approx. 200 × 90 × 180 mm	Approx. 2–3
25B-D6P0N104	PowerFlex 525	480 VAC class	6.0 A	2.2 kW class	General machinery	Approx. 200 × 90 × 180 mm	Approx. 2–3
25C-D2P3N104	PowerFlex 523	480 VAC class	2.3 A	0.75 kW class	Basic motor control	Approx. 200 × 90 × 180 mm	Approx. 2
25C-D4P0N104	PowerFlex 523	480 VAC class	4.0 A	1.5 kW class	Compact equipment	Approx. 200 × 90 × 180 mm	Approx. 2–3

These models should be regarded as related alternatives rather than automatic drop-in replacements.

The control architecture, terminal arrangement, programming, mounting dimensions and available functions can differ between drive families.

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23. Comparison with Compact PowerFlex Drives

Parameter	20G11RD3P4AA0NNNNN	25B-D2P3N104	25B-D4P0N104	25B-D6P0N104
Series	PowerFlex 755	PowerFlex 525	PowerFlex 525	PowerFlex 525
Product class	High-performance industrial drive	Compact industrial drive	Compact industrial drive	Compact industrial drive
Voltage class	480 VAC	480 VAC class	480 VAC class	480 VAC class
Current	3.4 A	2.3 A	4.0 A	6.0 A
Approx. power class	2 HP	1 HP class	2 HP class	3 HP class
Frame	Frame 1	Compact frame	Compact frame	Compact frame
Enclosure	IP20	IP20 class	IP20 class	IP20 class
Ethernet	Embedded EtherNet/IP	Ethernet-capable	Ethernet-capable	Ethernet-capable
PID	Supported	Supported	Supported	Supported
Dynamic braking	DB transistor	Configuration dependent	Configuration dependent	Configuration dependent
Approx. height	400 mm	Approx. 200 mm	Approx. 200 mm	Approx. 200 mm
Approx. width	190 mm	Approx. 90 mm	Approx. 90 mm	Approx. 90 mm
Approx. depth	211.1 mm	Approx. 180 mm	Approx. 180 mm	Approx. 180 mm
Weight (kg)	Approx. 6	Approx. 2	Approx. 2–3	Approx. 2–3
Main advantage	Advanced drive platform	Compact size	Compact size and higher current	Higher compact-drive capacity

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24. Why Choose the 20G11RD3P4AA0NNNNN Instead of a Smaller Drive?

The primary reason to select the 20G11RD3P4AA0NNNNN is not simply the 2 HP motor rating.

The PowerFlex 755 platform offers a broader set of industrial control capabilities.

For example, a machine may require:

• Advanced motor control
• EtherNet/IP communication
• Remote diagnostics
• Dynamic braking
• PID functionality
• Additional control options
• Centralized PLC operation
• Safety-related functions
• Flexible parameter configuration
• Industrial network integration

In such situations, a more basic compact drive may not provide the same level of flexibility.

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25. Conveyor Application Example

A typical small conveyor can be arranged as:

PLC → EtherNet/IP → 20G11RD3P4AA0NNNNN → Three-Phase Motor → Conveyor

The PLC can provide the speed command and start/stop instruction.

The drive controls motor acceleration and deceleration.

The drive can then return operating information to the controller.

Typical information includes:

• Actual motor speed
• Current
• Drive status
• Warning information
• Fault information
• Operating condition

This arrangement is suitable for automated production lines.

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26. Pump Application Example

For a small pump, the drive can operate according to a pressure or flow reference.

A typical sequence is:

Pressure decreases → feedback changes → drive increases motor speed

Pressure reaches target → drive maintains speed

Pressure increases → drive reduces motor speed

This provides more flexible operation than simply switching a fixed-speed motor on and off.

The same concept can be applied to:

• Water circulation
• Cooling
• Process flow
• Small pressure systems
• Auxiliary pumping

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27. Fan Application Example

A fan driven by the 20G11RD3P4AA0NNNNN can operate at a variable speed.

For example:

Low cooling demand → low motor speed

Medium cooling demand → medium motor speed

High cooling demand → high motor speed

This gives the machine more flexibility in managing airflow.

It can also simplify centralized control when multiple auxiliary motors are integrated into a single automation system.

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28. Packaging Application Example

A packaging machine may require different motor speeds during different stages of operation.

For example:

Loading → low speed

Transport → medium speed

Positioning → controlled low speed

Stopping → controlled deceleration

The drive can provide the required speed changes while the main controller manages the production sequence.

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29. Material-Handling Application Example

Material-handling equipment often benefits from controlled acceleration.

Instead of immediately applying full motor speed, the drive can accelerate the motor progressively.

This can help reduce:

• Mechanical shock
• Belt stress
• Coupling stress
• Sudden product movement
• Excessive starting current

Dynamic braking can also be useful where the load needs to stop quickly.

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30. Cabinet and Installation Considerations

Because the enclosure is IP20 open type, the drive should generally be installed in a suitable electrical cabinet.

The approximate drive dimensions are:

400 mm × 190 mm × 211.1 mm

The cabinet should provide more space than the physical dimensions of the drive.

A practical cabinet design should consider:

• Top clearance
• Bottom clearance
• Side clearance
• Cable bending radius
• Air circulation
• Heat dissipation
• Terminal access
• Maintenance access
• Network cable routing
• Grounding

The actual installation should follow the applicable drive installation requirements.

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31. Thermal Management

The drive is air cooled.

Heat generated by the power electronics must be removed from the enclosure.

Important considerations include:

• Cabinet temperature
• Fan operation
• Airflow
• Heat generated by adjacent devices
• Dust accumulation
• Cabinet ventilation

If several drives are installed in the same cabinet, their combined heat output should be considered.

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32. Maintenance

Regular maintenance can improve long-term reliability.

Maintenance Area	Recommended Check
Cooling fan	Check operation and noise
Air passages	Check for blockage
Cabinet	Remove excessive dust
Power terminals	Check connection condition
Motor cables	Check insulation and connections
Grounding	Verify grounding integrity
Network cables	Check physical condition
Drive temperature	Look for abnormal heating
Fault history	Review repeated faults
Motor current	Check for unusual increases
Braking system	Check when braking is frequently used
Ventilation	Verify adequate airflow

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33. Troubleshooting Guide

Problem	Possible Areas to Check
Motor will not start	Drive enable, start command and fault status
Drive trips during acceleration	Acceleration time and mechanical load
Overcurrent	Motor current, load and acceleration
Overvoltage	Deceleration time and braking requirements
Motor overheating	Motor load and ventilation
Drive overheating	Cabinet airflow and temperature
Incorrect speed	Speed reference and drive parameters
Network communication loss	Ethernet cable and network configuration
Unexpected stop	Fault history and control commands
Process instability	PID parameters and feedback
Excessive mechanical vibration	Motor, coupling and machine mechanics
Repeated faults	Motor condition, load condition and drive settings

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34. Five Same-Series Recommendations

1. 20G11RD2P1AA0NNNNN

This is a lower-current PowerFlex 755 model intended for approximately 1 HP normal-duty operation.

It is a suitable choice when the motor is smaller than the 2 HP class.

Approximate current: 2.1 A

Normal-duty: 1 HP

Heavy-duty: 0.5 HP

Frame: 1

Approximate weight: 6 kg

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2. 20G11RD3P4JA0NNNNN

This is the closest related configuration to the target model because it maintains the same 3.4 A current class and 2 HP normal-duty rating.

The configuration difference should be considered carefully when replacing an existing drive.

Approximate current: 3.4 A

Normal-duty: 2 HP

Heavy-duty: 1.5 HP

Frame: 1

Approximate weight: 6 kg

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3. 20G11RD5P0AA0NNNNN

This model provides a higher current capacity for approximately 3 HP normal-duty applications.

It is suitable where the target model is too small for the motor.

Approximate current: 5.0 A

Normal-duty: 3 HP

Heavy-duty: 2 HP

Frame: 1

Approximate weight: 6 kg class

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4. 20G11RD8P0AA0NNNNN

This is a higher-capacity configuration for applications around the 5 HP normal-duty class.

It can be considered for larger conveyors, pumps and material-handling machines.

Approximate current: 8.0 A

Normal-duty: 5 HP

Heavy-duty: 3 HP

Frame: 1

Approximate weight: 6 kg class

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5. 20G11RD011AA0NNNNN

This model moves into the approximately 7.5 HP normal-duty range.

It is useful when a machine requires considerably more motor current while retaining the general PowerFlex 755 architecture.

Approximate current: 11 A

Normal-duty: 7.5 HP

Heavy-duty: 5 HP

Frame: 1 class

Approximate weight: 6 kg class

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35. Five Related Popular Models

Model	Series	Voltage	Current	Power Class	Application	Approx. Dimensions	Weight (kg)
25B-D2P3N104	PowerFlex 525	480 VAC class	2.3 A	1 HP class	Small machines	Approx. 200 × 90 × 180 mm	Approx. 2
25B-D4P0N104	PowerFlex 525	480 VAC class	4.0 A	2 HP class	Conveyors / pumps	Approx. 200 × 90 × 180 mm	Approx. 2–3
25B-D6P0N104	PowerFlex 525	480 VAC class	6.0 A	3 HP class	General machinery	Approx. 200 × 90 × 180 mm	Approx. 2–3
25C-D2P3N104	PowerFlex 523	480 VAC class	2.3 A	1 HP class	Basic motor control	Approx. 200 × 90 × 180 mm	Approx. 2
25C-D4P0N104	PowerFlex 523	480 VAC class	4.0 A	2 HP class	Compact equipment	Approx. 200 × 90 × 180 mm	Approx. 2–3

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36. Product Selection Summary

Requirement	Best Choice
Approximately 1 HP motor	20G11RD2P1AA0NNNNN
Approximately 2 HP motor	20G11RD3P4AA0NNNNN
Same current with alternative configuration	20G11RD3P4JA0NNNNN
Approximately 3 HP motor	20G11RD5P0AA0NNNNN
Approximately 5 HP motor	20G11RD8P0AA0NNNNN
Approximately 7.5 HP motor	20G11RD011AA0NNNNN
Compact 1 HP-class drive	25B-D2P3N104
Compact 2 HP-class drive	25B-D4P0N104
Compact 3 HP-class drive	25B-D6P0N104
Basic small-motor control	25C-D2P3N104

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37. Complete Technical Specification Summary

Parameter	20G11RD3P4AA0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product family	PowerFlex 750-Series
Product type	AC Variable Frequency Drive
Voltage	480 VAC class
Input voltage	380–480 VAC class
Input	3-phase
Output	3-phase
Continuous current	3.4 A
1-minute current	Approx. 3.7 A
3-second current	Approx. 5.1 A
Normal-duty	2 HP
Normal-duty power	Approx. 1.5 kW
Heavy-duty	1.5 HP
Heavy-duty power	Approx. 1.1 kW
Frame	Frame 1
Enclosure	IP20
Enclosure style	Open Type
Cooling	Forced air
EtherNet/IP	Embedded
HIM	Blank / No HIM
Dynamic braking transistor	Yes
EMC filter	Yes
CM jumper	Removed
DC terminals	Yes
PID	Supported
Approx. height	400 mm
Approx. width	190 mm
Approx. depth	211.1 mm
Approx. dimensions	400 × 190 × 211.1 mm
Approx. weight (kg)	6 kg
Operating temperature	Approx. -20 to +60 °C class
Storage temperature	Approx. -40 to +70 °C class
Typical applications	Conveyors, pumps, fans, feeders, packaging, material handling
Installation	Protected electrical cabinet

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38. Overall Advantages

The 20G11RD3P4AA0NNNNN is a strong choice for industrial equipment requiring a relatively small motor drive but a more capable automation platform.

Its main advantages can be summarized as follows:

Advantage	Description
2 HP normal-duty rating	Suitable for many small industrial motors
3.4 A continuous output	Appropriate for the 2 HP class
480 VAC class	Suitable for common industrial three-phase systems
Frame 1	Compact mechanical format
IP20	Suitable for protected cabinet installation
Embedded EtherNet/IP	Convenient network integration
Dynamic braking transistor	Supports controlled motor deceleration
PID capability	Useful for pressure and flow applications
EMC filtering	Helps manage electrical interference
No HIM	Good for centralized control architectures
Air cooling	Suitable for industrial cabinet applications
Flexible control	Suitable for automated machine systems
Diagnostics	Useful for maintenance and troubleshooting
Expandable platform	Appropriate for more advanced automation requirements

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39. Final Product Assessment

The 20G11RD3P4AA0NNNNN is a PowerFlex 755, 480 VAC, three-phase AC variable frequency drive with a 3.4 A continuous output rating and a 2 HP normal-duty rating.

Its approximately 1.5 HP heavy-duty rating makes it suitable for moderately demanding small-motor applications, while the Frame 1 mechanical design keeps the package relatively compact.

The integrated EtherNet/IP interface is one of its most important advantages for automated machinery. It allows the drive to operate as part of a networked control system rather than as an isolated motor controller.

The internal dynamic-braking transistor provides additional flexibility for applications requiring controlled deceleration.

The integrated EMC filtering, PID capability, DC terminals, and advanced drive architecture further expand its application range.

With approximate dimensions of 400 × 190 × 211.1 mm and an approximate weight of 6 kg, it is well suited to cabinet-based industrial installations where space, communication and control functionality all need to be considered.

For a motor around 2 HP, this model is a particularly appropriate PowerFlex 755 configuration.

For smaller motors, 20G11RD2P1AA0NNNNN can be considered.

For a directly related configuration with the same 3.4 A current class, 20G11RD3P4JA0NNNNN can be considered.

For larger motors, 20G11RD5P0AA0NNNNN, 20G11RD8P0AA0NNNNN, and 20G11RD011AA0NNNNN provide progressively higher current and horsepower capabilities.

For simpler and more compact machinery, the PowerFlex 525 or PowerFlex 523 related models can be considered when the advanced PowerFlex 755 architecture is not required.

Overall, the 20G11RD3P4AA0NNNNN is best suited to small and medium-duty industrial automation equipment that requires reliable variable-speed motor control, network communication, controlled acceleration and deceleration, process-control capability, braking functionality and centralized machine diagnostics.