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Allen-Bradley 20G11BC1K1JN2NNNNN — Detailed Product Specifications, Product Introduction, Applications, Advantages and Related Model Recommendations

1. Product Overview

The 20G11BC1K1JN2NNNNN is a high-power Allen-Bradley PowerFlex 755 AC drive designed for large industrial motor-control applications.

It is an air-cooled, three-phase variable frequency drive for the 400 VAC class, with a rated output current of approximately 1,090 A.

The drive provides approximately 710 kW Low Duty, 630 kW Normal Duty and 500 kW Heavy Duty capability, placing it in the high-power end of the PowerFlex 755 family.

This model is particularly suitable for large pumps, fans, blowers, conveyors, compressors, process machinery, cooling systems, mining equipment and other large rotating industrial machines.

The drive uses a Frame 9, 600 mm deep MCC-style configuration with forced-air cooling.

The configuration includes AC input with precharge, DC terminals, EMC filtering and a CM jumper installed.

One of the most important differences between this model and the closely related 20G11BC1K1JN0NNNNN is the operator-interface configuration.

The JN2 version includes an Enhanced LCD, Full Numeric HIM configuration, making it more suitable when local monitoring, parameter adjustment and operator access are required.

The product is listed as an active PowerFlex 755 configuration.

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2. Brand and Product Series

Item	Specification
Brand	Allen-Bradley
Product family	PowerFlex
Series	PowerFlex 755
Product type	High-Power AC Variable Frequency Drive
Catalog number	20G11BC1K1JN2NNNNN
Drive construction	Air cooled
Voltage class	380–480 VAC
Nominal voltage	400 VAC
Input phase	3 phase
Output phase	3 phase
Output current	1,090 A
Low Duty rating	710 kW
Normal Duty rating	630 kW
Heavy Duty rating	500 kW
Frame	Frame 9
Enclosure	IP20 / NEMA Type 1
Cabinet style	600 mm deep MCC style
Cooling	Forced air
Input configuration	AC input with precharge
DC terminals	Yes
EMC filtering	Filtered
CM jumper	Installed
Dynamic braking	None
Internal dynamic-braking transistor	None
HIM	Enhanced LCD, Full Numeric
Communication	Embedded EtherNet/IP
Lifecycle	Active

The product identification confirms the model as a PowerFlex Air Cooled 755 AC Drive, with 400 VAC input, 1,090 A capacity, 600 mm cabinet depth, 630 kW Normal Duty and 500 kW Heavy Duty ratings.

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3. Main Technical Parameters

Parameter	Specification
Model	20G11BC1K1JN2NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product category	Industrial AC Variable Frequency Drive
Input voltage	380–480 VAC class
Nominal input voltage	400 VAC
Input frequency	50/60 Hz
Input phase	3 phase
Output phase	3 phase
Output current	1,090 A
Low Duty	710 kW
Normal Duty	630 kW
Heavy Duty	500 kW
Frame size	Frame 9
Cooling	Forced air / air cooled
Input type	AC input with precharge
DC terminals	Yes
Enclosure	IP20 / NEMA Type 1
Cabinet style	600 mm deep MCC style
EMC filtering	Yes
CM jumper	Installed
Dynamic braking	None
Internal braking transistor	None
HIM	Enhanced LCD, Full Numeric
Network	Embedded EtherNet/IP
Control capability	PID capable
Cabinet depth	600 mm
Overall dimensions	Frame 9; exact H × W configuration should be confirmed from the applicable mechanical drawing
Weight (kg)	Approximately 1,246 kg class
Lifecycle	Active

The official product information confirms the 400 V AC class, 1,090 A rating, 600 mm size/depth designation, 630 kW Normal Duty and 500 kW Heavy Duty ratings.

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4. Product Specification at a Glance

The following table provides a compact overview of the most important specifications.

Specification	Value
Catalog Number	20G11BC1K1JN2NNNNN
Brand	Allen-Bradley
Product Family	PowerFlex
Series	PowerFlex 755
Drive Type	Air-Cooled AC Drive
Input Voltage	380–480 VAC class
Nominal Voltage	400 VAC
Input	3 phase
Output	3 phase
Output Current	1,090 A
Low Duty	710 kW
Normal Duty	630 kW
Heavy Duty	500 kW
Frame	9
Enclosure	IP20 / NEMA Type 1
Cabinet Style	600 mm Deep MCC Style
Cooling	Forced Air
Input Type	AC Input with Precharge
DC Terminals	Yes
Filter	Included
CM Jumper	Installed
Dynamic Braking	None
HIM	Enhanced LCD, Full Numeric
Communication	Embedded EtherNet/IP
Dimensions	Frame 9 / 600 mm deep; exact H × W dependent on final cabinet arrangement
Weight (kg)	Approximately 1,246 kg
Lifecycle	Active

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5. Product Introduction

The 20G11BC1K1JN2NNNNN is designed to provide variable-speed control for very large three-phase AC motors.

Instead of connecting a motor directly to a fixed-frequency electrical supply, the drive controls the electrical power delivered to the motor.

This makes it possible to regulate motor speed and torque according to the requirements of the machine.

For large industrial systems, this type of control can be extremely useful.

A pump may need different flow rates during different production conditions.

A fan may need different airflow depending on temperature or process demand.

A conveyor may need to accelerate gradually and operate at different production speeds.

A compressor may need to respond to changing process requirements.

The drive provides the electrical control layer that allows the motor to respond to those requirements.

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6. Product Positioning

The 20G11BC1K1JN2NNNNN is a large-frame, high-current PowerFlex 755 drive.

Its 1,090 A output rating puts it firmly into the high-power industrial category.

It is not intended for small machines or ordinary low-power motor applications.

Instead, it is designed for large equipment where motor power can reach several hundred kilowatts.

The three primary power ratings are:

710 kW Low Duty

630 kW Normal Duty

500 kW Heavy Duty

These ratings allow the same drive platform to be applied to different types of industrial loads.

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7. Low Duty, Normal Duty and Heavy Duty Ratings

The three duty ratings are important when selecting the drive.

Duty Classification	Power Rating	Typical Load
Low Duty	710 kW	Variable-torque / less demanding applications
Normal Duty	630 kW	General industrial loads
Heavy Duty	500 kW	High-torque and higher-overload applications

The 710 kW Low Duty rating provides the highest published power capacity.

The 630 kW Normal Duty rating is more appropriate for many general industrial applications.

The 500 kW Heavy Duty rating should be considered when the machine requires higher torque or greater overload capability.

The correct rating should be determined using the motor current and actual load characteristics.

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8. 1,090 A Output Capability

The 1,090 A output current is one of the most significant specifications of this model.

At this current level, the drive can control very large motors.

Motor selection should not be based solely on horsepower or kilowatts.

The motor nameplate current should be checked carefully.

Important motor parameters include:

• Rated voltage.
• Rated current.
• Rated frequency.
• Rated speed.
• Power factor.
• Efficiency.
• Starting torque.
• Continuous torque.
• Overload requirements.
• Duty cycle.

The actual motor full-load current should remain within the applicable drive rating.

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9. 400 VAC Industrial Voltage Class

The model is designed around the 380–480 VAC industrial voltage range, with 400 VAC as the nominal voltage.

This is a common industrial power class.

The three-phase input provides the electrical source for the drive’s power-conversion system.

The drive then produces controlled variable-frequency output for the motor.

This allows the motor to operate at adjustable speeds instead of being restricted to the fixed frequency of the incoming utility supply.

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10. Frame 9 Construction

The drive uses Frame 9 construction.

Frame 9 is intended for large industrial applications.

The large physical structure provides room for:

• High-current power assemblies.
• Power semiconductor components.
• DC-bus components.
• Cooling equipment.
• Control electronics.
• High-current cable connections.
• Protection equipment.
• Maintenance access.

The physical scale of the equipment should be considered during project planning.

This is a floor-mounted industrial power system rather than a compact wall-mounted drive.

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11. 600 mm Deep MCC-Style Configuration

The product is identified with a 600 mm size/depth designation.

The MCC-style construction makes it suitable for integration into large electrical lineups.

The cabinet must provide enough room for:

• Power cabling.
• Control wiring.
• Ventilation.
• Service access.
• Grounding.
• High-current connections.

The 600 mm depth is an important mechanical parameter when designing the electrical room.

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12. Dimensions and Weight

The mechanical size of a Frame 9 high-power drive is considerably larger than that of a conventional small or medium industrial VFD.

The product configuration identifies the enclosure as 600 mm deep MCC style.

For detailed installation, the exact height and width should be taken from the mechanical drawing for the selected packaged configuration.

The approximate weight is around 1,246 kg, making lifting and transportation a major part of the installation plan.

Mechanical Parameter	Specification
Frame	Frame 9
Enclosure	IP20 / NEMA Type 1
Cabinet style	MCC style
Cabinet depth	600 mm
Cooling	Forced air
Mounting	Floor-mounted
Height	Configuration dependent
Width	Configuration dependent
Depth	600 mm
Dimensions H × W × D	Exact H × W to be confirmed from the applicable Frame 9 drawing; D = 600 mm
Weight (kg)	Approximately 1,246 kg

The 600 mm cabinet dimension is directly identified for this product configuration.

For transportation purposes, approximately 1.25 metric tons should be treated as a serious equipment-handling requirement.

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13. IP20 / NEMA Type 1 Enclosure

The main drive enclosure uses IP20 / NEMA Type 1 protection.

This type of enclosure is intended for a protected industrial environment.

It should not be treated as a weatherproof outdoor cabinet.

The installation should protect the drive against:

• Rain.
• Direct water.
• Condensation.
• Conductive dust.
• Corrosive gases.
• Excessive oil.
• Foreign objects.
• Severe vibration.
• Uncontrolled temperature.

A properly designed electrical room is generally the preferred installation environment.

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14. Air-Cooled Design

The drive uses forced-air cooling.

A drive operating at more than 1,000 A and several hundred kilowatts produces substantial heat.

The cooling system therefore has a direct influence on operating reliability.

The electrical room should provide:

• Adequate ventilation.
• Clean cooling air.
• Sufficient airflow.
• Proper cabinet clearances.
• Suitable ambient temperature.
• Regular fan inspection.

Dust accumulation can restrict airflow and increase thermal stress.

For that reason, cooling maintenance should be part of the normal preventive-maintenance program.

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15. EMC Filtering

The model uses a filtered configuration.

Filtering helps control electrical noise generated by high-frequency switching within the drive.

This is particularly important in facilities containing sensitive electrical and electronic equipment.

Examples include:

• PLCs.
• HMIs.
• Sensors.
• Industrial computers.
• Communication equipment.
• Measurement systems.
• Instrumentation.
• Other variable frequency drives.

Filtering is only one part of the EMC design.

Grounding, shielding, cable routing and installation practices remain important.

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16. CM Jumper Installed

The JN configuration indicates the filtered configuration with the CM jumper installed.

This is an important detail when comparing the model with similar catalog numbers.

For example, the older AN configuration uses a different common-mode jumper arrangement.

The complete catalog number should therefore be checked when selecting a replacement.

This is especially important when replacing an existing high-power drive.

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17. No Internal Dynamic-Braking Transistor

The 20G11BC1K1JN2NNNNN does not include an internal dynamic-braking transistor.

For many applications this is acceptable.

Large pumps and fans often do not require aggressive braking.

They can be allowed to decelerate gradually.

However, high-inertia applications may require a separate braking solution.

Potential examples include:

• Large conveyors.
• Crushers.
• Centrifuges.
• Large drums.
• Certain hoists.
• High-inertia fans.
• Heavy material-handling systems.

The actual braking requirement should be calculated from the machine’s inertia, speed and deceleration requirements.

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18. Enhanced LCD Full Numeric HIM

The JN2 configuration is particularly notable because it includes an Enhanced LCD, Full Numeric HIM.

This is one of the most important differences between the JN2 and JN0 configurations.

The local HIM can be useful for:

• Parameter configuration.
• Local status monitoring.
• Fault investigation.
• Drive commissioning.
• Maintenance.
• Local operation.
• Diagnostic work.

This makes the JN2 configuration attractive when technicians need direct access to the drive.

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19. Why the HIM Matters

A large industrial drive can be integrated into a PLC and HMI system, but local access remains useful.

During commissioning, technicians may need to verify:

• Motor parameters.
• Current.
• Frequency.
• Speed.
• Fault codes.
• Drive status.
• Acceleration.
• Deceleration.

A local HIM can make these tasks more convenient.

This is particularly useful during installation before the plant control system is fully commissioned.

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20. JN0 vs JN2

Feature	20G11BC1K1JN0NNNNN	20G11BC1K1JN2NNNNN
Series	PowerFlex 755	PowerFlex 755
Voltage	400 VAC	400 VAC
Output current	1,090 A	1,090 A
Low Duty	710 kW	710 kW
Normal Duty	630 kW	630 kW
Heavy Duty	500 kW	500 kW
Frame	9	9
Cooling	Air cooled	Air cooled
Filtering	Filtered	Filtered
CM jumper	Installed	Installed
Dynamic braking	None	None
HIM	None	Enhanced LCD, Full Numeric
Cabinet depth	600 mm	600 mm
Approx. weight	1,246 kg class	1,246 kg class
Main advantage	Centralized control	Local + centralized control

The two models are electrically very similar.

The major practical difference is the operator-interface configuration.

For a plant that wants local maintenance and operator access, the JN2 is generally more convenient.

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21. Embedded EtherNet/IP

The PowerFlex 755 platform supports embedded EtherNet/IP communication.

This allows the drive to become part of the plant automation network.

Typical information can include:

• Start commands.
• Stop commands.
• Speed reference.
• Actual speed.
• Output current.
• Output frequency.
• Drive status.
• Fault status.
• Alarm information.
• Diagnostic information.

For large industrial plants, this can provide a convenient method of integrating high-power motor control into the main automation system.

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22. Centralized Automation

The JN2 configuration can combine local operation with centralized automation.

This is often an excellent arrangement for large industrial facilities.

The local HIM can be used by maintenance personnel.

The PLC can control the drive during normal production.

The plant HMI can provide the operator interface.

EtherNet/IP can provide the communication link.

This creates a layered control architecture:

Drive → PLC → HMI / SCADA → Operator

while the local HIM remains available for maintenance and commissioning.

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23. Application — Large Water Pumps

Large water pumps are one of the strongest application areas for this drive.

A pumping system rarely needs exactly the same flow all day.

The drive can adjust motor speed according to:

• Flow requirement.
• Pressure requirement.
• Tank level.
• Process demand.
• Water consumption.

Potential benefits include:

• Better flow control.
• Better pressure control.
• Reduced throttling.
• Smoother acceleration.
• Reduced mechanical stress.
• Potential energy savings.

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24. Application — Process Pumps

Industrial process plants often use large pumps to move liquids between different process stages.

Potential applications include:

• Process-water pumps.
• Feed pumps.
• Transfer pumps.
• Circulation pumps.
• Cooling-water pumps.
• Large chemical-process pumps.

The drive can provide variable-speed operation while the automation system controls the process.

The local HIM is useful for commissioning and maintenance.

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25. Application — Cooling-Water Pumps

Large cooling systems frequently use high-power pumps.

The drive can adjust pump speed according to the thermal load.

Applications include:

• Industrial cooling.
• Furnace cooling.
• Cooling towers.
• Heat exchangers.
• Process plants.
• Large HVAC systems.

The ability to reduce motor speed during periods of lower cooling demand can provide process and energy-management benefits.

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26. Application — Large Fans

Large fans can require hundreds of kilowatts.

The drive can adjust airflow by changing motor speed.

Potential applications include:

• Industrial ventilation.
• Furnace fans.
• Mine ventilation.
• Exhaust systems.
• Dust collection.
• Process cooling.
• Large HVAC installations.

A variable-speed drive can provide more flexible airflow control than a fixed-speed motor arrangement.

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27. Application — Large Blowers

Large blowers are used in many industrial processes.

Potential applications include:

• Wastewater aeration.
• Combustion air.
• Pneumatic conveying.
• Industrial drying.
• Furnace systems.
• Process air.

The drive can adjust blower speed according to actual process requirements.

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28. Application — Large Conveyors

Large conveyors often require controlled acceleration.

A direct fixed-speed start can create significant mechanical stress.

A variable frequency drive can gradually accelerate the motor.

Potential benefits include:

• Reduced belt shock.
• Reduced gearbox stress.
• Reduced coupling stress.
• Smoother material movement.
• Adjustable production speed.
• Better conveyor coordination.

For high-inertia conveyors, braking requirements must be considered separately.

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29. Application — Mining Equipment

Mining equipment frequently uses large motors.

Potential applications include:

• Long conveyors.
• Crushers.
• Pumps.
• Ventilation systems.
• Material-handling systems.
• Processing equipment.

The high-current capacity of the drive makes it suitable for large mining motors.

However, the electrical room should provide suitable protection from mining-related dust and contamination.

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30. Application — Cement Plants

Cement plants contain many large rotating machines.

Potential applications include:

• Kiln fans.
• Exhaust fans.
• Crushers.
• Conveyors.
• Pumps.
• Blowers.
• Material-handling equipment.

The PowerFlex 755 Frame 9 platform is appropriate for large motors where high current and centralized control are required.

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31. Application — Compressors

Large compressors can use several-hundred-kilowatt motors.

A variable-speed drive allows the motor speed to respond to process demand.

Potential advantages include:

• Adjustable compressor output.
• Controlled acceleration.
• Process matching.
• Reduced mechanical stress.
• Potential energy savings.

Compressor suitability must still be evaluated against the compressor’s torque curve and operating cycle.

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32. Application Suitability Table

Application	Suitability	Main Benefit
Large water pump	Excellent	Flow and pressure control
Process pump	Excellent	Process regulation
Cooling-water pump	Excellent	Variable flow
Large industrial fan	Excellent	Variable airflow
Blower	Excellent	Adjustable process output
Large conveyor	Excellent	Controlled acceleration
Mining conveyor	Excellent	High-power motor control
Crusher	Very Good	High-current capacity
Compressor	Very Good	Variable-speed operation
Cement machinery	Very Good	Large motor control
Cooling-tower fan	Excellent	Variable airflow
Industrial HVAC	Very Good	Variable-speed control
Hoist	Requires detailed evaluation	Braking requirements
Crane	Requires detailed evaluation	Regenerative energy
Centrifuge	Requires detailed evaluation	High-inertia deceleration
Small machine	Not recommended	Excessive capacity

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33. Energy-Management Benefits

Variable-speed control can be particularly valuable for variable-torque loads.

For example, when a pump does not need full flow, the motor speed can be reduced.

Likewise, a fan can reduce speed when less airflow is required.

Potential benefits include:

• Lower energy consumption.
• Better process matching.
• Reduced throttling.
• Reduced mechanical stress.
• Improved process flexibility.

The actual energy savings depend on the application, motor efficiency, load profile and operating hours.

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34. Motor Selection

The drive should be matched to the motor using actual motor nameplate information.

Motor Parameter	Why It Matters
Motor voltage	Must match drive voltage class
Motor current	Primary drive-sizing parameter
Motor power	Must fit duty rating
Motor frequency	Important for speed control
Motor speed	Defines operating range
Motor torque	Determines application suitability
Overload	Determines duty classification
Starting torque	Important for heavy loads
Acceleration	Determines starting requirements
Deceleration	Determines braking requirements
Motor cable length	Important for installation
Motor insulation	Important for VFD operation
Duty cycle	Important for thermal loading

The 1,090 A rating should be compared with the actual motor full-load current rather than using motor kW alone.

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35. Duty Selection Example

Suppose a large pump uses a motor around 600 kW.

If its actual load is variable torque and the operating cycle is relatively moderate, the Normal Duty rating may be appropriate.

For a more demanding conveyor or high-torque machine, the Heavy Duty rating becomes more important.

The same motor power does not necessarily mean the same drive selection.

The load’s mechanical behavior matters.

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36. Electrical Installation

A 1,090 A drive requires a properly engineered electrical system.

Installation Item	Consideration
Incoming voltage	400 VAC class
Input phase	3 phase
Drive output current	1,090 A
Motor current	Must match drive rating
Power conductors	High-current sizing
Busbars	High-current capacity
Protective devices	Proper coordination
Grounding	Properly engineered
EMC	Filtering and cable routing
Short-circuit protection	Must be coordinated
Cooling	Adequate ventilation
Service space	Required
Braking	Evaluate machine inertia
Communication	Integrate with plant network

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37. Power Cable Requirements

The current level of this drive makes the power cable system a major engineering consideration.

The design may involve:

• Parallel conductors.
• High-current cable systems.
• Busbar systems.
• High-current terminations.
• Proper grounding.
• Thermal calculations.
• Short-circuit calculations.
• EMC considerations.

The final cable arrangement should be determined by qualified electrical engineering personnel.

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38. Motor Cable Requirements

The motor cable should also be carefully designed.

Important considerations include:

• Motor current.
• Cable length.
• Cable installation method.
• Ambient temperature.
• Cable grouping.
• Motor insulation.
• Grounding.
• EMC requirements.

Long motor cables can create additional electrical stresses.

Therefore, the motor cable should be considered as part of the complete drive system.

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39. Cooling Requirements

The drive’s air-cooling system must have sufficient airflow.

The electrical room should account for the heat generated by:

• Power semiconductors.
• DC-bus components.
• Cooling fans.
• Control electronics.
• Other electrical equipment.

Blocked airflow can increase operating temperature.

Cooling fans should therefore be included in preventive maintenance.

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40. Environmental Requirements

The IP20 / NEMA Type 1 enclosure is designed for a protected industrial environment.

The installation should avoid:

• Direct water.
• Rain.
• Condensation.
• Conductive dust.
• Corrosive gases.
• Excessive oil.
• Excessive vibration.
• Uncontrolled temperatures.

For dusty industries such as mining and cement, a properly controlled electrical room is especially important.

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41. Local Operation Advantages

The JN2 version has an important practical advantage over the JN0 version.

It provides a local Enhanced LCD Full Numeric HIM.

This allows maintenance personnel to interact directly with the drive.

Potential uses include:

• Parameter setup.
• Fault diagnosis.
• Local status checks.
• Commissioning.
• Manual testing.
• Maintenance.
• Troubleshooting.

For facilities where maintenance personnel regularly work directly at the drive cabinet, this can be a significant advantage.

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42. Centralized Operation Advantages

The JN2 configuration does not have to be operated locally.

It can also be integrated into a centralized control system.

This gives the plant two levels of access:

Local HIM

and

Remote PLC/HMI control

This is a practical arrangement for large industrial facilities.

Normal production can be controlled from the central system.

Maintenance personnel can use the local HIM when necessary.

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43. Embedded EtherNet/IP Advantages

The network capability allows the drive to exchange information with the control system.

Potential benefits include:

• Remote start/stop.
• Remote speed reference.
• Current monitoring.
• Speed monitoring.
• Fault monitoring.
• Alarm monitoring.
• Drive-status monitoring.
• Centralized diagnostics.

For a plant with multiple high-power drives, network integration can make operation more organized and consistent.

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44. PID Control Applications

PID capability can be useful in process applications.

For example:

A pump can regulate pressure.

A fan can regulate airflow.

A blower can regulate process pressure.

A cooling pump can respond to temperature-related demand.

The drive can adjust motor speed based on the process variable.

This can reduce the need for separate speed-control hardware in some applications.

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45. Advantages of PowerFlex 755

The PowerFlex 755 family is designed for applications requiring advanced motor control.

Major advantages include:

• High-power capability.
• High-current Frame 9 designs.
• Industrial Ethernet integration.
• Flexible control architecture.
• PID capability.
• Diagnostic functions.
• Multiple power ratings.
• Safety-related control options.
• Local HIM options.
• Centralized automation compatibility.

The PowerFlex 755 platform is intended for substantially larger and more sophisticated applications than compact machine drives.

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46. Advantages of 20G11BC1K1JN2NNNNN

Advantage	Practical Benefit
1,090 A output	Supports very large motors
710 kW Low Duty	High variable-torque capacity
630 kW Normal Duty	Strong general industrial capacity
500 kW Heavy Duty	Supports demanding torque loads
400 VAC class	Common industrial voltage
Frame 9	Large high-power platform
600 mm deep MCC style	Suitable for electrical-room installations
Air cooled	Practical high-power cooling
Filtered	Helps control electrical interference
CM jumper installed	Defined common-mode configuration
Enhanced LCD Full Numeric HIM	Local operation and diagnostics
Embedded EtherNet/IP	Automation integration
PID capability	Process-control applications
AC input with precharge	Suitable high-power input configuration
DC terminals	Supports specified input architecture
Centralized + local control	Flexible operating architecture

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47. Main Limitations

The drive’s large power capacity also creates several practical limitations.

First, the physical size is substantial.

A Frame 9, 600 mm deep MCC-style cabinet requires considerable electrical-room space.

Second, the equipment is heavy.

An approximately 1,246 kg installation requires suitable transportation and lifting equipment.

Third, the main enclosure is IP20 / NEMA Type 1.

The drive therefore requires a protected environment.

Fourth, there is no internal dynamic-braking transistor.

Applications requiring rapid deceleration or significant regenerative braking need additional evaluation.

Finally, the drive is far too large for small motors.

Using a 1,090 A drive for a small machine would be economically and technically inefficient.

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48. Maintenance

The JN2 configuration is convenient for maintenance because the local HIM provides direct access to drive information.

Maintenance personnel can check:

• Faults.
• Alarms.
• Motor current.
• Motor speed.
• Frequency.
• Drive status.
• Parameters.
• Operating conditions.

Other maintenance tasks include:

• Cooling fan inspection.
• Air-passage cleaning.
• Power-terminal inspection.
• Grounding inspection.
• Cable inspection.
• Network connection inspection.
• Cabinet inspection.
• Parameter backup.

The local HIM is especially useful when the plant network is unavailable during commissioning or maintenance.

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49. Commissioning

A typical commissioning process can include:

1. Verify incoming voltage.
2. Verify motor nameplate data.
3. Confirm motor current.
4. Confirm motor power.
5. Select the appropriate duty rating.
6. Enter motor parameters.
7. Configure control mode.
8. Configure speed reference.
9. Verify motor direction.
10. Test acceleration.
11. Test deceleration.
12. Evaluate braking.
13. Configure EtherNet/IP.
14. Test remote start/stop.
15. Test local HIM operation.
16. Verify alarms.
17. Verify faults.
18. Test the motor under controlled conditions.
19. Test process response.
20. Record final parameters.

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50. Five Recommended Same-Series Models

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

Model	Series	Voltage	Current	Low Duty	Normal Duty	Heavy Duty	Frame	Dimensions / Weight
20G11BC910JN2NNNNN	PowerFlex 755	400 VAC	910 A class	560 kW	500 kW	400 kW	9	600 mm deep MCC style; weight configuration dependent
20G11BC1K0JN2NNNNN	PowerFlex 755	400 VAC	1,040 A	630 kW	560 kW	500 kW	9	600 mm deep MCC style; approx. 1,246 kg class
20G11BC1K1JN0NNNNN	PowerFlex 755	400 VAC	1,090 A	710 kW	630 kW	500 kW	9	600 mm deep MCC style; approx. 1,246 kg class
20G11BC1K2JN2NNNNN	PowerFlex 755	400 VAC	Higher-current Frame 9 class	800 kW	710 kW	560 kW	9	600 mm deep MCC style; configuration dependent
20G11BC1K5JN2NNNNN	PowerFlex 755	400 VAC	1,480 A	900 kW	850 kW	710 kW	9	600 mm deep MCC style; configuration dependent

The progression around the 20G11BC1K1 family provides useful alternatives when the required motor current or power is lower or higher.

For example, the 20G11BC1K0 is a logical lower-capacity option, while the 20G11BC1K2 and 20G11BC1K5 versions move toward higher-power applications.

The 20G11BC1K5 configuration is identified at 1,480 A, 850 kW Normal Duty and 710 kW Heavy Duty.

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51. Five Same-Brand Popular Related Models

Model	Series	Voltage Class	Current / Power	Frame	Typical Application	Dimensions / Weight
20F1ANF263JN0NNNNN	PowerFlex 753	690 VAC	263 A; 250 kW ND / 200 kW HD	7	Large industrial motor control	Approx. 881.5 × 430 × 349.6 mm; approx. 48 kg
20G11BC910JN0NNNNN	PowerFlex 755	400 VAC	910 A; 500/400 kW class	9	Large pumps and fans	600 mm deep MCC style; configuration dependent
20G11BF590JN0NNNNN	PowerFlex 755	690 VAC	590 A class	9	Large 690 VAC motors	Frame 9; configuration dependent
20G11BC1K0JN0NNNNN	PowerFlex 755	400 VAC	1,040 A; 630/560/500 kW	9	Large process equipment	600 mm deep MCC style; approx. 1,246 kg class
25B-D030N114	PowerFlex 525	480 VAC class	Approx. 30 A class	Compact	Machine-level motor control	Compact frame; configuration dependent

These models represent different application levels within the broader Allen-Bradley drive range.

The PowerFlex 753 is a strong choice for general-purpose industrial motor control at lower power levels.

The PowerFlex 755 is more suitable for advanced, high-power motor systems.

The PowerFlex 525 is a compact solution for smaller machines and is not intended to compete directly with a Frame 9 drive.

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52. Comparison with 20G11BC1K0JN2NNNNN

The 20G11BC1K0JN2NNNNN is a useful lower-power alternative.

Feature	20G11BC1K0JN2NNNNN	20G11BC1K1JN2NNNNN
Series	PowerFlex 755	PowerFlex 755
Voltage	400 VAC	400 VAC
Output current	1,040 A	1,090 A
Low Duty	630 kW	710 kW
Normal Duty	560 kW	630 kW
Heavy Duty	500 kW	500 kW
Frame	9	9
Filtering	Filtered	Filtered
CM jumper	Installed	Installed
Dynamic braking	None	None
HIM	Enhanced LCD Full Numeric	Enhanced LCD Full Numeric
Cabinet depth	600 mm	600 mm
Weight	Approx. 1,246 kg class	Approx. 1,246 kg class

The 20G11BC1K1JN2NNNNN provides additional Low Duty and Normal Duty capacity.

The 20G11BC1K0JN2NNNNN may be more economical when the motor current requirement is lower.

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53. Comparison with 20G11BC1K2JN2NNNNN

The 20G11BC1K2JN2NNNNN moves to a higher power class.

Feature	20G11BC1K1JN2NNNNN	20G11BC1K2JN2NNNNN
Series	PowerFlex 755	PowerFlex 755
Voltage	400 VAC	400 VAC
Low Duty	710 kW	800 kW
Normal Duty	630 kW	710 kW
Heavy Duty	500 kW	560 kW
Frame	9	9
HIM	Enhanced LCD Full Numeric	Enhanced LCD Full Numeric
Filtering	Filtered	Filtered
CM jumper	Installed	Installed
Cabinet depth	600 mm	600 mm
Cooling	Air cooled	Air cooled
Weight	Approx. 1,246 kg class	Configuration dependent

The 20G11BC1K2JN2NNNNN is worth considering when the motor operates above the comfortable rating range of the 20G11BC1K1.

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54. Comparison with 20G11BC1K5JN2NNNNN

For applications requiring considerably more capacity, the 20G11BC1K5JN2NNNNN is a higher-rated Frame 9 alternative.

Feature	20G11BC1K1JN2NNNNN	20G11BC1K5JN2NNNNN
Voltage	400 VAC	400 VAC
Current	1,090 A	1,480 A
Low Duty	710 kW	900 kW
Normal Duty	630 kW	850 kW
Heavy Duty	500 kW	710 kW
Frame	9	9
Cabinet depth	600 mm	600 mm
HIM	Enhanced LCD Full Numeric	Enhanced LCD Full Numeric
Filtering	Filtered	Filtered
CM jumper	Installed	Installed
Dynamic braking	None	None

The 20G11BC1K5JN2NNNNN is a substantially higher-capacity alternative and should only be selected when the motor and load actually require the additional current and power capability.

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55. Comparison with 20G11BC1K1JN0NNNNN

This is perhaps the most useful comparison because the two models have nearly the same electrical characteristics.

Feature	20G11BC1K1JN0NNNNN	20G11BC1K1JN2NNNNN
Voltage	400 VAC	400 VAC
Output current	1,090 A	1,090 A
Low Duty	710 kW	710 kW
Normal Duty	630 kW	630 kW
Heavy Duty	500 kW	500 kW
Frame	9	9
Cooling	Air cooled	Air cooled
Filtering	Filtered	Filtered
CM jumper	Installed	Installed
Dynamic braking	None	None
HIM	None	Enhanced LCD Full Numeric
Cabinet depth	600 mm	600 mm
Weight	Approx. 1,246 kg class	Approx. 1,246 kg class
Best use	Centralized control	Local + centralized control

If the electrical ratings are the same, the HIM configuration becomes the major selection factor.

Choose JN0 when local HIM access is unnecessary.

Choose JN2 when local operator or maintenance access is important.

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56. Five Recommended Models — Summary

Model	Main Reason to Consider	Duty / Current Characteristics	Frame	Dimensions / Weight
20G11BC910JN2NNNNN	Lower-capacity alternative	560 / 500 / 400 kW class	9	600 mm deep; weight configuration dependent
20G11BC1K0JN2NNNNN	Slightly lower capacity	630 / 560 / 500 kW	9	600 mm deep; approx. 1,246 kg class
20G11BC1K1JN0NNNNN	Same power, no local HIM	710 / 630 / 500 kW; 1,090 A	9	600 mm deep; approx. 1,246 kg class
20G11BC1K2JN2NNNNN	Higher-capacity alternative	800 / 710 / 560 kW class	9	600 mm deep; configuration dependent
20G11BC1K5JN2NNNNN	Much higher-capacity option	900 / 850 / 710 kW; 1,480 A	9	600 mm deep; configuration dependent

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57. Mechanical Installation Planning

The large physical size of this drive means mechanical planning should begin before the equipment arrives.

Important considerations include:

• Electrical-room dimensions.
• Floor loading.
• Transportation route.
• Door openings.
• Lifting equipment.
• Cabinet alignment.
• Cable-entry location.
• Cable bending radius.
• Front service clearance.
• Cooling airflow.
• Adjacent equipment.

The approximately 1,246 kg weight should be considered during every stage of transportation and installation.

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58. Electrical Room Planning

A high-power Frame 9 drive should normally be installed in a properly designed electrical environment.

The room should have:

• Adequate ventilation.
• Suitable temperature control.
• Low contamination.
• Appropriate electrical clearances.
• Adequate service access.
• Proper grounding.
• Suitable cable routing.
• Adequate floor strength.

The drive should not be squeezed into a space without sufficient airflow or maintenance access.

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59. Why the 20G11BC1K1JN2NNNNN Is Different from Smaller Drives

The main difference is scale.

A compact VFD may be installed inside a machine control panel.

This drive belongs to a completely different class.

It controls a motor system that may require:

• High-current power distribution.
• Large motor cables.
• Large protective devices.
• Dedicated ventilation.
• Floor-mounted cabinets.
• Industrial networking.
• Maintenance access.
• Professional commissioning.

The drive should therefore be treated as a major electrical subsystem.

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60. Practical Advantages in Large Plants

A large industrial plant can benefit from this type of drive in several ways.

The motor speed can be matched to the actual process.

The drive can communicate with the automation system.

Maintenance personnel can access the local HIM.

The drive can provide fault and status information.

The motor can accelerate more smoothly.

Process equipment can operate at different speeds.

The plant can coordinate several large motors through the same automation architecture.

This combination is particularly valuable in large process industries.

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61. Typical System Architecture

A typical installation may look like:

Incoming 400 VAC Power

↓

Protective and Switching Equipment

↓

PowerFlex 755 20G11BC1K1JN2NNNNN

↓

Large Three-Phase Motor

↓

Pump / Fan / Conveyor / Blower / Process Machine

At the control level:

PLC

↓

EtherNet/IP

↓

PowerFlex 755

At the operator level:

HMI / SCADA

↓

PLC

↓

PowerFlex 755

At the local maintenance level:

Enhanced LCD Full Numeric HIM

↓

PowerFlex 755

This arrangement provides both centralized and local access.

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62. Recommended Application Priorities

The drive is particularly attractive when the application requires:

1. High motor power.
2. High output current.
3. Adjustable motor speed.
4. Centralized control.
5. Local maintenance access.
6. Industrial Ethernet communication.
7. Process control.
8. Large-frame construction.
9. High reliability in a controlled electrical environment.
10. Integration into a larger automation system.

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63. Applications Where Additional Engineering Is Required

Some applications require more detailed engineering before selecting this model.

These include:

• Cranes.
• Hoists.
• Elevators.
• Centrifuges.
• High-inertia fans.
• Large regenerative conveyors.
• Rapid-deceleration machinery.
• Applications with frequent acceleration and deceleration.

The absence of an internal dynamic-braking transistor means the braking system should be evaluated separately.

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64. Product Advantages vs Application Requirements

Requirement	20G11BC1K1JN2NNNNN
Large motor	Excellent
High current	Excellent
Variable speed	Excellent
Pump control	Excellent
Fan control	Excellent
Conveyor control	Excellent
Centralized automation	Excellent
Local maintenance	Excellent
EtherNet/IP	Excellent
Process PID	Very Good
Compact installation	Poor
Outdoor installation without protection	Poor
Small motors	Poor
High-regeneration applications	Requires additional design

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65. Key Parameters for Purchasing

When purchasing this model, the following information should be checked carefully:

Purchasing Item	Specification
Model	20G11BC1K1JN2NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Voltage	400 VAC class
Current	1,090 A
Low Duty	710 kW
Normal Duty	630 kW
Heavy Duty	500 kW
Frame	9
Cabinet depth	600 mm
Enclosure	IP20 / NEMA Type 1
Cooling	Air cooled
Filter	Filtered
CM jumper	Installed
Dynamic braking	None
HIM	Enhanced LCD Full Numeric
Network	Embedded EtherNet/IP
Dimensions	Frame 9; exact H × W to be confirmed by configuration drawing; depth 600 mm
Weight (kg)	Approximately 1,246 kg

The catalog number should be checked in full because seemingly small changes in the code can change the HIM, filtering, braking or other configuration characteristics.

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66. Final Technical Summary

The 20G11BC1K1JN2NNNNN is a high-power Allen-Bradley PowerFlex 755 AC drive intended for large industrial motor-control systems.

Its main electrical characteristics are:

400 VAC

Three phase

1,090 A

710 kW Low Duty

630 kW Normal Duty

500 kW Heavy Duty

Frame 9

The mechanical configuration is:

IP20 / NEMA Type 1

600 mm deep MCC style

Air cooled

Approximately 1,246 kg

The exact overall height and width depend on the applicable Frame 9 packaged arrangement and should be confirmed using the final mechanical drawing.

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67. Main Advantages

The most important advantages of the 20G11BC1K1JN2NNNNN are its combination of high current, high power and flexible operator access.

The 1,090 A output rating supports very large industrial motors.

The 710 kW Low Duty rating provides substantial variable-torque capacity.

The 630 kW Normal Duty rating covers many large industrial applications.

The 500 kW Heavy Duty rating provides useful capacity for more demanding torque loads.

The Frame 9 platform provides the physical architecture required for high-power equipment.

The embedded EtherNet/IP capability supports centralized automation.

The Enhanced LCD Full Numeric HIM provides convenient local commissioning and maintenance.

The filtered configuration with CM jumper installed provides a defined EMC/common-mode configuration.

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68. Final Conclusion

The 20G11BC1K1JN2NNNNN is best described as a high-current, high-power Frame 9 PowerFlex 755 AC drive for large industrial motor applications.

Its combination of 1,090 A output current, 710 kW Low Duty, 630 kW Normal Duty and 500 kW Heavy Duty ratings makes it suitable for demanding industrial equipment.

The drive is particularly well suited to:

large water pumps

process pumps

cooling systems

large industrial fans

blowers

large conveyors

mining equipment

cement machinery

compressors

industrial ventilation

material-handling equipment

large process machinery

The JN2 configuration adds an important practical advantage over the JN0 configuration because it provides an Enhanced LCD Full Numeric HIM.

This allows technicians to work directly at the drive during installation, commissioning and maintenance.

At the same time, the drive can remain integrated into a centralized automation system through EtherNet/IP.

That combination of local access plus centralized control makes the JN2 configuration particularly attractive for large industrial plants.

The mechanical side of the installation should not be underestimated.

The Frame 9, 600 mm deep MCC-style configuration is large industrial equipment, and the approximate 1,246 kg weight requires appropriate transportation, lifting and floor-loading planning.

The IP20 / NEMA Type 1 enclosure also means the drive should be installed in a suitable protected electrical environment.

For pumps and fans, the drive can provide flexible speed control and potentially improve process efficiency.

For conveyors, crushers and other high-inertia machines, the braking requirements should be evaluated separately because the model does not contain an internal dynamic-braking transistor.

From a selection perspective, the most useful neighboring models are the 20G11BC1K0JN2NNNNN for a slightly lower power requirement, the 20G11BC1K2JN2NNNNN for higher capacity, and the 20G11BC1K5JN2NNNNN for substantially higher-current applications.

The 20G11BC1K1JN0NNNNN is the closest same-rating alternative when a local HIM is not required.

Overall, the 20G11BC1K1JN2NNNNN is a strong choice when a project requires a large 400 VAC motor drive, approximately 1,090 A output capability, high-power Frame 9 construction, industrial Ethernet integration, filtered operation, and local Enhanced LCD Full Numeric operator access.