Company Information
E-mail		[email protected]
Mobile		+8615980777398
Whatsapp		+8615980777398
WeChat		15980777398

1. Product Identification

Item	Specification
Model	20G11NB042JA0NNNNN
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 755
Product Platform	PowerFlex 750-Series
Product Type	AC Variable Frequency Drive
Drive Type	Air-Cooled AC Drive
Voltage Class	240 VAC
Input Voltage	208–240 VAC class
Input Phase	Three Phase
Output Current	42 A
Normal-Duty Rating	15 HP / 11 kW
Heavy-Duty Rating	10 HP / 7.5 kW
Frame Size	Frame 3
Cooling	Forced Air
Enclosure	IP20/IP00, NEMA/UL Open Type
Input Configuration	AC Input with DC Terminals
Precharge	Included
Dynamic Braking	Internal DB Transistor
EMC Filtering	Filtered
CM Jumper	Installed
Communication	Embedded EtherNet/IP
Operator Interface	Blank / No HIM
Mounting	Panel Mount / Cabinet Mount
Approx. Weight (kg)	22.68 kg
Approx. Dimensions	Approximately 440 × 185 × 250 mm class

---

2. Product Introduction

The 20G11NB042JA0NNNNN is an industrial variable frequency drive designed to control the speed, torque and operating behavior of three-phase AC motors.

Instead of supplying the motor directly with a fixed-frequency AC power source, the drive electronically controls the motor’s output voltage and frequency.

This allows the motor to accelerate gradually, operate at adjustable speeds and decelerate according to a programmed profile.

The drive is particularly suitable for industrial machinery where simple motor starting and stopping is not enough.

It can be used when the machine requires controlled motor speed, improved process control, controlled acceleration, controlled stopping, network communication and detailed drive diagnostics.

The 42 A output rating places this model in a substantially higher power class than smaller PowerFlex 755 Frame 2 drives.

For normal-duty applications, it is rated at approximately 15 HP / 11 kW.

For heavy-duty applications, the rating is approximately 10 HP / 7.5 kW.

This makes it a useful choice for medium-sized pumps, fans, conveyors, mixers, material-handling machinery and general industrial equipment.

---

3. Brand and Series

The product belongs to the Allen-Bradley brand and the PowerFlex 755 series.

The PowerFlex 755 family is part of the broader PowerFlex 750-Series platform.

The 755 platform is intended for applications where users need more flexibility and control capability than a basic compact drive can provide.

The series supports a wide range of motor-control requirements and is available in numerous voltage, current, enclosure and option configurations.

For this particular model, the important configuration characteristics are the 240 V class input, 42 A output rating, Frame 3 mechanical construction, forced-air cooling, embedded EtherNet/IP, filtering, CM jumper and dynamic-braking transistor.

---

4. Main Technical Parameters

Parameter	Specification
Model	20G11NB042JA0NNNNN
Product Series	PowerFlex 755
Voltage Class	240 VAC
Input Voltage	208–240 VAC
Input Phase	3 Phase
Input Frequency	Approximately 47–63 Hz
Output Phase	3 Phase
Continuous Output Current	42 A
Normal-Duty Power	15 HP
Normal-Duty Power	Approximately 11 kW
Heavy-Duty Power	10 HP
Heavy-Duty Power	Approximately 7.5 kW
Frame	Frame 3
Cooling	Forced Air
Enclosure	IP20/IP00
Enclosure Type	NEMA/UL Open Type
Input Type	AC Input with Precharge
DC Bus Terminals	Yes
Dynamic Braking	DB Transistor
Filtering	Filtered
CM Jumper	Installed
Communication	Embedded EtherNet/IP
HIM	Blank / No HIM
Mounting	Panel Mount
Operating Temperature	Approximately 0–50 °C
Relative Humidity	5–95%, non-condensing
Storage Temperature	Approximately −40–70 °C
Weight (kg)	Approximately 22.68 kg
Dimensions	Approximately 440 × 185 × 250 mm class

---

5. Voltage and Power Rating

The drive belongs to the 240 VAC class and is intended for three-phase electrical systems.

The normal-duty rating is:

42 A / 15 HP / 11 kW

The heavy-duty rating is:

42 A class / 10 HP / 7.5 kW

The distinction between normal duty and heavy duty is important when selecting the drive for an actual machine.

Normal-duty applications can generally utilize the higher horsepower rating where the load profile is appropriate.

Heavy-duty applications normally involve greater torque demand, higher starting requirements or more severe overload conditions.

Rating Category	Specification
Model	20G11NB042JA0NNNNN
Voltage	240 VAC class
Normal-Duty Current	42 A
Normal-Duty Horsepower	15 HP
Normal-Duty Power	11 kW
Heavy-Duty Horsepower	10 HP
Heavy-Duty Power	7.5 kW
Phase	3 Phase

---

6. Input Characteristics

The drive uses a three-phase AC input configuration with precharge and DC terminals.

The input voltage class is 240 V, covering the 208–240 V range used in many industrial electrical systems.

The DC terminals can be useful in systems involving DC-bus connections, braking arrangements or other compatible drive-system configurations.

Input Parameter	Specification
Model	20G11NB042JA0NNNNN
Input Type	AC Input with Precharge
Nominal Voltage	240 VAC
Voltage Class	240 VAC
Operating Class	208–240 VAC
Phase	Three Phase
Frequency	Approximately 47–63 Hz
DC Terminals	Included
Precharge	Included
Grounding	Required
Input Protection	Must be selected according to installation

The actual incoming power system must be compatible with the drive rating.

The installation should also account for short-circuit protection, grounding, cable size, disconnect equipment and applicable electrical requirements.

---

7. Output Characteristics

The drive supplies a variable-frequency three-phase output to the connected motor.

The output frequency can be adjusted to control motor speed.

This is one of the most important functions of the drive.

For example, a conveyor motor does not necessarily have to operate at full speed all the time.

The control system can command the drive to operate the motor at a lower speed, increase speed gradually or stop the motor according to a programmed ramp.

Output Parameter	Specification
Model	20G11NB042JA0NNNNN
Output Phase	3 Phase
Continuous Current	42 A
Normal-Duty Power	15 HP / 11 kW
Heavy-Duty Power	10 HP / 7.5 kW
Output Voltage	Variable
Output Frequency	Variable
Speed Control	Yes
Acceleration Control	Yes
Deceleration Control	Yes
Torque Control	Available through applicable motor-control modes

---

8. Motor-Control Capability

The PowerFlex 755 architecture provides several motor-control approaches.

The actual control mode should be selected according to the motor, load and required performance.

V/Hz Control

V/Hz control is appropriate for relatively straightforward applications.

It can be used where the motor primarily needs adjustable speed and the application does not require the highest level of dynamic torque control.

Typical examples include:

• Fans
• Pumps
• Simple conveyors
• Blowers
• General machinery

Sensorless Vector Control

Sensorless vector control provides improved speed and torque performance compared with basic V/Hz control.

It can be useful when the motor needs better low-speed behavior and improved load response.

Typical applications include:

• Conveyors
• Mixers
• Material handling
• Processing equipment
• General constant-torque machinery

Flux Vector Control

Flux-vector-based control can provide more advanced control performance.

It is useful when the application requires improved torque regulation, speed response or dynamic performance.

The exact performance depends on motor data, tuning and application conditions.

---

9. Dynamic Braking

The 20G11NB042JA0NNNNN includes an internal dynamic-braking transistor.

This is an important feature for applications in which the motor and mechanical load need controlled deceleration.

When a motor is decelerating, the rotating mechanical system can return energy to the drive’s DC bus.

If this regenerated energy exceeds what the drive can naturally handle, a braking resistor can be used to dissipate the energy.

The internal braking transistor provides the switching element required for this braking arrangement.

Braking Parameter	Specification
Model	20G11NB042JA0NNNNN
Dynamic Braking	Supported
Internal DB Transistor	Yes
External Braking Resistor	Application dependent
Main Purpose	Controlled deceleration
Suitable Loads	High-inertia machinery
Typical Applications	Conveyors, mixers, rotating machinery

The braking transistor should not be confused with a complete braking-resistor assembly.

The resistor must be appropriately selected for the actual machine inertia, stopping time and braking frequency.

---

10. EtherNet/IP Communication

The drive includes embedded EtherNet/IP communication.

This allows it to become part of a larger industrial automation network.

A PLC or other controller can exchange operating commands and status information with the drive.

Typical information can include:

Communication Function	Example
Model	20G11NB042JA0NNNNN
Start Command	Start motor
Stop Command	Stop motor
Speed Reference	Command motor speed
Direction	Forward / Reverse
Actual Speed	Motor operating speed
Output Current	Drive current
Drive Status	Running / Stopped
Fault Status	Fault information
Alarm Status	Warning information
Reset	Fault reset command

This communication capability is particularly useful in automated production systems.

---

11. Enclosure and Cooling

The drive is an IP20/IP00 NEMA/UL Open Type unit.

It is not designed to function as a sealed outdoor drive.

The final installation should normally provide an appropriate cabinet or enclosure when the surrounding environment requires additional protection.

The drive uses forced-air cooling.

Airflow is therefore an important consideration when designing the control cabinet.

Mechanical / Environmental Feature	Specification
Model	20G11NB042JA0NNNNN
Enclosure	IP20/IP00
NEMA/UL Style	Open Type
Cooling	Forced Air
Installation	Panel / Cabinet
Mounting Orientation	Vertical
Cabinet Ventilation	Required
Direct Water Exposure	Not suitable
Dusty Environment	Requires suitable cabinet protection

---

12. Physical Dimensions

The product uses a Frame 3 mechanical configuration.

The approximate overall dimensions are in the 440 × 185 × 250 mm class.

The actual panel design should not be based solely on the overall drive dimensions.

Additional space is required for:

• Power wiring
• Control wiring
• Cable bending
• Ventilation
• Heat dissipation
• Maintenance
• Terminal access
• Mounting hardware

Dimension	Approximate Value
Model	20G11NB042JA0NNNNN
Height	Approximately 440 mm
Width	Approximately 185 mm
Depth	Approximately 250 mm
Overall Dimensions	Approximately 440 × 185 × 250 mm
Frame	Frame 3
Mounting	Panel Mount
Orientation	Vertical
Weight (kg)	Approximately 22.68 kg

For engineering drawings and cabinet fabrication, the exact mechanical drawing for the particular hardware revision should be used rather than relying on rounded dimensions.

---

13. Weight

The approximate product weight is 22.68 kg.

This is considerably heavier than the smaller Frame 2 PowerFlex 755 drives.

The additional weight should be considered when designing the mounting panel and when transporting or installing the unit.

Weight Information	Value
Model	20G11NB042JA0NNNNN
Approximate Drive Weight	22.68 kg
Weight (kg)	Approximately 22.68 kg
Shipping Package	Higher than drive weight
Cabinet	Not included
External Braking Resistor	Not included
Additional Accessories	Not included

---

14. Operating Environment

The drive is intended for an industrial environment with appropriate temperature, humidity and ventilation.

A typical operating temperature range is approximately 0 to 50 °C.

The environment should be kept free from excessive moisture, conductive dust, corrosive contamination and excessive heat.

Environmental Parameter	Typical Specification
Model	20G11NB042JA0NNNNN
Operating Temperature	Approximately 0–50 °C
Storage Temperature	Approximately −40–70 °C
Relative Humidity	5–95%, non-condensing
Cooling	Forced Air
Installation	Indoor industrial cabinet
Ventilation	Required
Condensation	Not permitted
Corrosive Atmosphere	Requires appropriate protection
Excessive Dust	Requires appropriate protection

---

15. Product Applications

15.1 Industrial Pumps

The drive is well suited to industrial pump systems where flow or pressure varies according to process demand.

Typical applications include:

• Process-water pumps
• Cooling-water pumps
• Circulation pumps
• Industrial fluid transfer
• Water treatment equipment
• Pressure-control systems

Variable-speed control can reduce the need for mechanical throttling.

It can also make the pumping process more responsive to changing production requirements.

---

16. Fans and Blowers

Fans and blowers are another common variable-frequency-drive application.

The motor can operate at different speeds according to the required airflow.

Typical applications include:

• Factory ventilation
• Exhaust systems
• Cooling systems
• Air-handling equipment
• Industrial blowers
• Process ventilation

For variable-torque fan applications, reducing motor speed can provide significant energy-saving potential compared with continuously running the motor at full speed.

---

17. Conveyor Systems

The 20G11NB042JA0NNNNN is suitable for conveyor applications within its motor-current and duty limitations.

Typical applications include:

• Production conveyors
• Packaging conveyors
• Material-transfer conveyors
• Assembly lines
• Warehouse equipment
• Processing lines

Controlled acceleration can reduce mechanical shock.

Controlled deceleration can also reduce abrupt stopping of the conveyed material.

---

18. Mixers

Industrial mixers often require adjustable motor speed.

Different materials and production stages may require different motor speeds.

The drive can provide a controlled speed reference to the motor.

Potential applications include:

• Industrial mixing
• Material processing
• Batch systems
• Chemical processing equipment
• Food-processing machinery
• General production machinery

For high-torque mixers, the heavy-duty rating should be evaluated carefully.

---

19. Material Handling

Material-handling systems can benefit from adjustable speed and controlled acceleration.

Potential applications include:

• Feeders
• Conveyors
• Transfer systems
• Packaging machines
• Production-line machinery
• Automated material-handling equipment

The drive can allow the machine controller to adjust motor speed according to production requirements.

---

20. Machine Tools

The drive can also be used in selected machine-tool applications.

Possible uses include:

• Auxiliary motors
• Cooling pumps
• Ventilation fans
• Material handling
• General machine mechanisms

The exact suitability depends on the machine’s required speed range, torque characteristics, stopping requirements and control precision.

---

21. Product Advantages

21.1 High Current Capacity

The 42 A rating provides substantially more motor capacity than smaller Frame 2 configurations.

The normal-duty rating reaches approximately 15 HP / 11 kW.

This makes the unit suitable for medium-sized industrial machines.

---

21.2 Flexible Duty Selection

The drive can be applied in both normal-duty and heavy-duty categories.

This allows the same drive family to cover different types of mechanical loads.

The important point is that the actual motor current and load profile must be compared against the appropriate duty rating.

---

21.3 Integrated EtherNet/IP

The embedded communication capability reduces the need for a separate communication architecture for basic Ethernet-based control.

This makes it easier to integrate the drive into an automated control system.

---

21.4 Dynamic Braking

The integrated DB transistor is useful for high-inertia loads.

It provides a practical foundation for dynamic-braking applications where an external braking resistor is required.

---

21.5 Industrial Diagnostics

The drive can provide detailed operating and fault information.

This can help maintenance personnel identify abnormal conditions more efficiently.

Potential diagnostic areas include:

• Overcurrent
• Overvoltage
• Undervoltage
• Motor overload
• Drive temperature
• Ground faults
• Communication faults
• DC-bus abnormalities

---

21.6 Adjustable Acceleration and Deceleration

The drive can gradually accelerate and decelerate the motor.

This can reduce mechanical stress compared with direct-on-line starting.

It can also improve the smoothness of the production process.

---

21.7 Flexible Motor Control

The drive can support multiple control approaches.

This makes it suitable for applications ranging from relatively simple variable-speed loads to more demanding torque-control applications.

---

22. Energy-Saving Potential

Variable-frequency control can provide energy-saving opportunities, particularly with variable-torque loads such as fans and pumps.

A motor does not always need to run at 100% speed.

When process demand decreases, the drive can reduce motor speed.

This can potentially reduce energy consumption.

The actual savings depend on:

• Motor efficiency
• Pump or fan design
• Mechanical transmission
• Process requirements
• Operating schedule
• Average motor speed
• Load profile

The drive should therefore be considered not only as a speed-control device but also as a tool for improving process control.

---

23. Motor Protection

The drive provides electronic monitoring and protection functions.

Depending on the configuration and programmed parameters, it can monitor motor operating conditions and detect abnormal electrical conditions.

Typical protection areas include:

• Motor overload
• Excessive current
• DC-bus overvoltage
• DC-bus undervoltage
• Ground faults
• Drive overheating
• Communication errors

Correct parameter setup is important.

The motor nameplate data should be entered accurately so that the drive can provide appropriate motor-control performance.

---

24. Maintenance Advantages

The drive’s diagnostic capabilities can simplify troubleshooting.

A technician can examine operating status and fault information before starting a complete physical inspection.

This can help distinguish between:

• Electrical faults
• Motor problems
• Mechanical overload
• Communication problems
• Drive-temperature problems
• Power-supply problems

In production environments, faster fault identification can help reduce machine downtime.

---

25. Installation Considerations

The drive should be mounted vertically in an environment with sufficient airflow.

Because it is an open-type drive, the cabinet should provide suitable environmental protection.

The panel should also allow adequate clearance around the drive.

Installation Factor	Recommendation
Model	20G11NB042JA0NNNNN
Mounting	Vertical
Installation	Electrical cabinet / panel
Cooling	Forced Air
Ventilation	Adequate airflow
Power Wiring	Correctly sized
Motor Wiring	Correctly sized
Grounding	Proper industrial grounding
Cabinet Temperature	Within drive limits
Cable Routing	Separate power/control where appropriate
Maintenance Space	Required
Braking Resistor	Required if dynamic braking is used

---

26. Five Same-Series or Closely Related Models

The following models are useful for comparison within the PowerFlex 755 family.

The first group is especially useful when selecting a drive around the same voltage class and application range.

Model	Series	Voltage Class	Current	Normal-Duty Rating	Heavy-Duty Rating	Frame	Approx. Dimensions	Weight (kg)
20G11NB028JA0NNNNN	PowerFlex 755	240 VAC	28 A	10 HP / 7.5 kW	7.5 HP / 5.5 kW	Frame 3	Approx. 440 × 185 × 250 mm class	Approx. 22.7
20G11NB042JA0NNNNN	PowerFlex 755	240 VAC	42 A	15 HP / 11 kW	10 HP / 7.5 kW	Frame 3	Approx. 440 × 185 × 250 mm class	Approx. 22.68
20G11NB054JA0NNNNN	PowerFlex 755	240 VAC	54 A	20 HP / 15 kW	15 HP / 11 kW	Frame 4	Larger Frame 4	Higher than Frame 3
20G11NB070JA0NNNNN	PowerFlex 755	240 VAC	70 A	25 HP / 18.5 kW	20 HP / 15 kW	Frame 4	Larger Frame 4	Higher than Frame 3
20G11NB080JA0NNNNN	PowerFlex 755	240 VAC	80 A	30 HP / 22 kW	25 HP / 18.5 kW	Frame 5	Larger Frame 5	Higher than Frame 4

The 20G11NB028JA0NNNNN is particularly close in application range and mechanical family.

The 20G11NB054JA0NNNNN, 20G11NB070JA0NNNNN and 20G11NB080JA0NNNNN are useful when the motor power requirement increases.

---

27. Same-Series Electrical Comparison

Model	Voltage	Output Current	Normal Duty	Heavy Duty	Frame	Cooling
20G11NB028JA0NNNNN	208–240 VAC	28 A	10 HP / 7.5 kW	7.5 HP / 5.5 kW	3	Forced Air
20G11NB042JA0NNNNN	208–240 VAC	42 A	15 HP / 11 kW	10 HP / 7.5 kW	3	Forced Air
20G11NB054JA0NNNNN	208–240 VAC	54 A	20 HP / 15 kW	15 HP / 11 kW	4	Forced Air
20G11NB070JA0NNNNN	208–240 VAC	70 A	25 HP / 18.5 kW	20 HP / 15 kW	4	Forced Air
20G11NB080JA0NNNNN	208–240 VAC	80 A	30 HP / 22 kW	25 HP / 18.5 kW	5	Forced Air

---

28. Five Same-Brand Popular Models

For a broader comparison, the following models cover different positions in the same brand’s industrial drive portfolio.

Model	Series	Voltage Class	Current / Power	Typical Application	Approx. Dimensions	Weight (kg)
25B-D010N104	PowerFlex 525	480 VAC class	10 A class	Small pumps, fans, machinery	Compact	Configuration-dependent
25B-D017N104	PowerFlex 525	480 VAC class	17 A class	Conveyors, pumps, fans	Compact	Configuration-dependent
25B-D027N114	PowerFlex 525	480 VAC class	27 A class	General industrial machinery	Compact	Configuration-dependent
20F11ND077AA0NNNNN	PowerFlex 753	480 VAC class	77 A class	Medium industrial equipment	Frame-dependent	Configuration-dependent
20G11NB042JA0NNNNN	PowerFlex 755	240 VAC	42 A / 15 HP ND	Industrial motor control	Approx. 440 × 185 × 250 mm class	Approx. 22.68

These products should not be treated as electrically interchangeable.

The voltage, motor current, duty rating, control functions, enclosure and physical dimensions must be checked before selecting a substitute.

---

29. Application-Based Model Selection

Application	Suitable Comparison Model	Main Reason
Small pump	25B-D010N104	Compact drive architecture
Small fan	25B-D017N104	Adjustable-speed control
Small conveyor	25B-D027N114	General machinery control
Medium industrial machine	20F11ND077AA0NNNNN	Higher current capability
15 HP class industrial motor	20G11NB042JA0NNNNN	42 A / 15 HP ND
20 HP class 240 V motor	20G11NB054JA0NNNNN	Higher current capacity
25 HP class 240 V motor	20G11NB070JA0NNNNN	Higher current capacity
30 HP class 240 V motor	20G11NB080JA0NNNNN	Higher current capacity

---

30. Comparison with a Conventional Motor Starter

A conventional starter is primarily intended to connect and disconnect the motor.

A variable-frequency drive provides much greater control over the motor.

Function	Conventional Starter	20G11NB042JA0NNNNN
Start / Stop	Yes	Yes
Variable Speed	No	Yes
Adjustable Acceleration	Limited	Yes
Adjustable Deceleration	Limited	Yes
Dynamic Braking	Normally external	Supported
Electronic Motor Protection	Limited	Yes
Network Communication	Limited	Embedded EtherNet/IP
Speed Reference	No	Yes
Current Monitoring	Limited	Yes
Fault Diagnostics	Limited	Extensive
Process Integration	Limited	Yes
Energy Optimization	Limited	Possible

---

31. Advantages in Conveyor Applications

For a conveyor system, the drive can provide controlled acceleration rather than applying full motor torque immediately.

This can help reduce:

• Mechanical shock
• Belt stress
• Gearbox stress
• Product movement
• Starting current
• Sudden load changes

The speed can also be adjusted to match the production line.

For example, a conveyor may operate at a lower speed during inspection and a higher speed during normal production.

---

32. Advantages in Pump Applications

For pumps, the drive can adjust motor speed according to process demand.

This can help avoid running the motor continuously at maximum speed when full flow is not necessary.

Potential advantages include:

• Adjustable flow
• Improved pressure control
• Reduced throttling
• Smoother starting
• Controlled stopping
• Potential energy reduction

---

33. Advantages in Fan Applications

For fans, speed control can be especially useful because fan loads are strongly affected by speed.

The drive can reduce fan speed when less airflow is required.

This can provide:

• Better airflow regulation
• Reduced mechanical stress
• Lower operating noise
• Potential energy savings
• Improved process control

---

34. Advantages in Mixer Applications

Mixing processes frequently require different operating speeds.

A high speed may be required during one process stage while a lower speed may be preferable during another.

The drive can provide controlled speed transitions rather than relying on fixed-speed motor operation.

This can improve process flexibility.

---

35. Advantages in Material-Handling Systems

Material-handling equipment often requires smooth acceleration and deceleration.

The drive can help the system move material more consistently.

The controller can also modify the motor speed according to production requirements.

The combination of speed control, communication and diagnostics makes the drive useful for automated material-handling equipment.

---

36. Product Strengths at a Glance

Advantage	Description
42 A Output	Suitable for 15 HP normal-duty applications
240 V Class	Suitable for 208–240 V three-phase systems
Frame 3	Medium-size mechanical platform
Forced-Air Cooling	Suitable for continuous industrial operation
EtherNet/IP	Convenient automation integration
Dynamic Braking	Internal DB transistor
Filtering	Helps manage electrical noise
CM Jumper	Configured for common-mode requirements
DC Terminals	Supports compatible DC-bus applications
Flexible Control	Multiple motor-control strategies
Diagnostics	Detailed operating and fault information
Variable Speed	Adjustable motor operation
Controlled Acceleration	Smooth motor starting
Controlled Deceleration	Smooth motor stopping
Industrial Design	Suitable for panel and cabinet installation

---

37. Mechanical and Electrical Summary

Parameter	Value
Model	20G11NB042JA0NNNNN
Series	PowerFlex 755
Frame	3
Input Voltage	208–240 VAC
Nominal Voltage	240 VAC
Input Phase	3 Phase
Output Current	42 A
Normal-Duty Rating	15 HP / 11 kW
Heavy-Duty Rating	10 HP / 7.5 kW
Cooling	Forced Air
Enclosure	IP20/IP00
Mounting	Panel Mount
Communication	Embedded EtherNet/IP
Dynamic Braking	Internal DB Transistor
Filtering	Filtered
CM Jumper	Installed
DC Terminals	Yes
Precharge	Yes
HIM	Blank / No HIM
Approx. Height	440 mm
Approx. Width	185 mm
Approx. Depth	250 mm
Approx. Dimensions	440 × 185 × 250 mm
Weight (kg)	Approximately 22.68 kg

---

38. Recommended Use

The 20G11NB042JA0NNNNN is particularly attractive when the application falls into the following general range:

Three-phase, 208–240 VAC motor system + approximately 42 A drive capacity + 15 HP normal-duty motor + industrial automation + variable-speed operation.

It is a good fit when the application requires more than simple on/off motor control.

The model is especially useful when the machine requires:

• Variable motor speed
• Controlled acceleration
• Controlled deceleration
• Network control
• Drive diagnostics
• Dynamic braking
• Industrial cabinet installation
• Medium-power motor control

---

39. Selection Notes

When selecting this drive for a real machine, the motor nameplate should be checked first.

Important values include:

• Motor voltage
• Motor full-load current
• Motor horsepower
• Motor frequency
• Motor speed
• Motor service factor
• Motor insulation
• Load torque
• Starting torque
• Required acceleration time
• Required stopping time

The motor current is particularly important.

A motor’s horsepower alone should not be used as the only selection criterion.

The actual full-load current and duty requirements should be compared with the drive’s rating.

---

40. Final Technical Summary

Category	Specification
Model	20G11NB042JA0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Family	PowerFlex 750-Series
Type	AC Variable Frequency Drive
Voltage Class	240 VAC
Input	208–240 VAC, 3 Phase
Output Current	42 A
Normal-Duty	15 HP / 11 kW
Heavy-Duty	10 HP / 7.5 kW
Frame	3
Cooling	Forced Air
Enclosure	IP20/IP00
Mounting	Panel / Cabinet
Communication	Embedded EtherNet/IP
Braking	DB Transistor
Input	AC with Precharge
DC Terminals	Yes
Filtering	Yes
CM Jumper	Installed
HIM	Blank / No HIM
Approx. Dimensions	440 × 185 × 250 mm class
Weight (kg)	Approx. 22.68 kg
Temperature	Approx. 0–50 °C
Humidity	5–95% non-condensing
Main Applications	Pumps, fans, conveyors, mixers, material handling, industrial machinery
Main Strength	High-function industrial variable-speed motor control

---

41. Overall Product Evaluation

The 20G11NB042JA0NNNNN is a relatively high-capacity configuration within the 240 V class of the PowerFlex 755 family.

Its 42 A output capacity allows it to handle applications substantially larger than the smaller Frame 2 models.

The 15 HP / 11 kW normal-duty rating makes it appropriate for a broad range of medium-sized industrial machines.

For more demanding applications, the 10 HP / 7.5 kW heavy-duty rating provides a more conservative operating point.

The Frame 3 construction provides the additional physical and thermal capacity associated with the higher current rating.

The approximately 440 × 185 × 250 mm mechanical envelope and approximately 22.68 kg weight should be considered when designing a control cabinet.

The embedded EtherNet/IP capability is a major advantage for automated systems.

It allows the drive to participate in a networked control architecture rather than operating only as an isolated motor controller.

The internal dynamic-braking transistor is also valuable for machinery requiring controlled deceleration.

When used with a correctly selected braking resistor, the system can handle regenerative energy generated during appropriate high-inertia stopping conditions.

The product’s forced-air cooling and open-type enclosure make proper cabinet design particularly important.

Adequate ventilation, temperature management and environmental protection should be provided.

Overall, the 20G11NB042JA0NNNNN is best characterized as a medium-power, network-capable, industrial AC drive for 240 V three-phase motor applications, with a strong combination of motor-control flexibility, communication capability, dynamic braking and industrial diagnostics.

For applications involving pumps, fans, conveyors, mixers, material-handling equipment and general production machinery, it provides a versatile platform for replacing fixed-speed motor operation with controlled variable-speed operation.

The most important selection characteristics are:

42 A output current, 15 HP / 11 kW normal-duty capacity, 10 HP / 7.5 kW heavy-duty capacity, 240 V three-phase operation, Frame 3 construction, forced-air cooling, IP20/IP00 open enclosure, embedded EtherNet/IP, internal dynamic-braking transistor, filtered input configuration and approximately 22.68 kg equipment weight.

When comparing related models, the 20G11NB028JA0NNNNN is the closest lower-current option in the same 240 V family, while the 20G11NB054JA0NNNNN, 20G11NB070JA0NNNNN and 20G11NB080JA0NNNNN provide progressively higher current and horsepower capacity.

For a final replacement or engineering selection, the complete catalog number should be matched character by character because apparently similar catalog numbers can represent different voltage, enclosure, braking, filtering, communication or mechanical configurations.