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Allen-Bradley 20G11BC1K2JN4NNNNN — Detailed Product Specifications, Introduction, Applications, Advantages, Series Information and Recommended Models

1. Product Overview

The 20G11BC1K2JN4NNNNN is a high-power Allen-Bradley PowerFlex 755 AC Drive designed for large industrial motor-control applications.

It belongs to the PowerFlex 755 series and the 755 AC Packaged Drive family. This configuration is an air-cooled, high-current drive intended for large three-phase AC motors used in demanding industrial processes.

The drive is rated for the 400 V AC three-phase class, with a published output current of 1,175 A. Its principal published power ratings are 710 kW Normal Duty and 560 kW Heavy Duty. The corresponding Light Duty rating is approximately 800 kW for this rating class. The unit is a Frame 9 design with a 600 mm deep MCC-style enclosure.

One of the most important characteristics of the JN4 configuration is its local operator-interface arrangement. It is intended for applications where a local enhanced operator interface is required, while the overall drive remains part of a larger industrial automation system.

The product is currently listed as Active.

2. Brand and Product Series

Item	Specification
Model	20G11BC1K2JN4NNNNN
Brand	Allen-Bradley
Product family	PowerFlex
Series	PowerFlex 755
Product category	AC Variable Frequency Drive
Sub-family	755 AC Packaged Drive
Drive type	Air-Cooled AC Drive
Application class	High-power industrial motor control
Frame	Frame 9
Input voltage	400 V AC
Input phase	3 phase
Output current	1,175 A
Normal Duty	710 kW
Heavy Duty	560 kW
Light Duty	Approximately 800 kW
Enclosure	IP20 / Type 1
Cabinet style	600 mm Deep MCC Style
Cooling	Air cooled
Input configuration	AC Input with Precharge
DC terminals	Included in the applicable input configuration
EMC/filter configuration	Filtered
CM jumper	Installed
Dynamic braking	None
Local operator interface	Enhanced LCD / Full Numeric HIM
Communication	Embedded EtherNet/IP
Product status	Active

3. Complete Technical Parameter Table

Parameter	Specification
Model	20G11BC1K2JN4NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product family	PowerFlex 750-Series
Product type	PowerFlex 755 AC Packaged Drive
Construction	Air cooled
Input voltage	400 VAC class
Input phase	3 phase
Input frequency	50/60 Hz class
Output phase	3 phase
Rated output current	1,175 A
Light Duty power	Approximately 800 kW
Normal Duty power	710 kW
Heavy Duty power	560 kW
Frame size	Frame 9
Enclosure	IP20 / Type 1
Cabinet style	600 mm Deep MCC Style
Cooling	Forced air / air cooled
Input type	AC Input with Precharge
EMC filtering	Filtered
CM configuration	Jumper Installed
Dynamic braking	None
Local operator interface	Enhanced LCD / Full Numeric HIM
Communication	Embedded EtherNet/IP
Application	Large industrial motor control
Depth	600 mm
Overall dimensions	Frame 9 MCC-style configuration; exact height and width depend on the applicable mechanical drawing
Weight (kg)	Approximately 1,246 kg class
Product status	Active

4. Electrical Rating

The 20G11BC1K2JN4NNNNN is a very large industrial AC drive.

Its most important electrical specification is the 1,175 A output-current rating.

This places the drive well above the size range normally associated with small machine drives. It is intended for large motors and substantial mechanical loads.

The published 400 V rating class, 1,175 A output and 710 kW Normal Duty / 560 kW Heavy Duty ratings identify this as a Frame 9 high-power configuration.

5. Power Rating

The power rating should be understood together with the load duty.

Duty Category	Approximate Power Rating
Light Duty	Approximately 800 kW
Normal Duty	710 kW
Heavy Duty	560 kW

The Normal Duty rating is particularly important for applications where the motor operates continuously under a relatively stable industrial load.

The Heavy Duty rating is more relevant when the motor experiences greater overload requirements.

The final selection should always be based on motor nameplate current, load torque, overload requirements and actual operating conditions rather than simply comparing motor kW values.

6. 400 V AC Three-Phase Operation

The drive is designed for the 400 V AC three-phase industrial voltage class.

This makes it suitable for industrial installations using the common 380–400 V class power system.

A typical installation can be represented as:

Three-Phase AC Supply → PowerFlex 755 Drive → Large AC Motor → Mechanical Load

The drive regulates the electrical power supplied to the motor, allowing motor speed and operating characteristics to be adjusted according to the process requirement.

7. High-Current 1,175 A Configuration

The 1,175 A rating is one of the strongest reasons to choose this model.

A current rating of this magnitude makes the drive appropriate for large motor-driven equipment such as:

• Large water pumps.
• Cooling-water pumps.
• Large fans.
• Industrial blowers.
• Mining conveyors.
• Cement-plant machinery.
• Large material-handling systems.
• Process equipment.
• High-capacity ventilation systems.
• Certain large compressors.

8. Frame 9 Design

The 20G11BC1K2JN4NNNNN uses a Frame 9 configuration.

Frame 9 is intended for large-power drive applications and provides the physical architecture necessary for high-current power conversion.

The frame accommodates major drive components such as:

• Power conversion assemblies.
• DC-bus components.
• Control electronics.
• Cooling equipment.
• High-current electrical connections.
• Communication and option hardware.

The Frame 9 designation is therefore not just a catalog classification. It also indicates that the physical installation is significantly larger than that of ordinary industrial VFDs.

9. Enclosure and Cabinet Configuration

The published configuration uses a Type 1 / IP20 enclosure arrangement with a 600 mm deep MCC-style cabinet.

This configuration is intended for installation in a suitable industrial electrical environment.

The enclosure should not be treated as an outdoor weatherproof enclosure.

The installation environment should therefore provide suitable protection from:

• Rain.
• Direct water.
• Excessive dust.
• Chemical contamination.
• Condensation.
• Uncontrolled outdoor exposure.

10. Dimensions

The catalog information identifies the configuration as a 600 mm deep MCC-style design.

The 600 mm depth is an important planning dimension for cabinet integration, cable routing and maintenance access.

The exact overall height and width should be taken from the mechanical drawing applicable to the final supplied configuration rather than estimated from the frame number alone.

Mechanical Parameter	Specification
Model	20G11BC1K2JN4NNNNN
Frame	Frame 9
Enclosure	Type 1 / IP20
Cabinet type	MCC style
Depth	600 mm
Overall height	Configuration-dependent
Overall width	Configuration-dependent
Cooling	Forced air
Installation	Industrial electrical room / MCC lineup
Final dimensional reference	Applicable mechanical drawing

This approach is particularly important for projects where the drive must fit into an existing electrical room or MCC lineup.

11. Weight

The 20G11BC1K2JN4NNNNN is heavy industrial equipment.

For preliminary engineering and logistics planning, this configuration can be treated as being in the approximately 1,246 kg class, or about 1.25 metric tons.

Weight Parameter	Specification
Model	20G11BC1K2JN4NNNNN
Equipment category	High-power industrial drive
Approximate weight (kg)	1,246 kg class
Approximate metric tons	1.25 t
Transportation	Heavy equipment handling
Floor loading	Must be checked
Lifting equipment	Required
Final shipping weight	Confirm from equipment documentation

The approximate weight should be used for preliminary planning.

For crane selection, floor-loading calculations, transportation and final mechanical engineering, the actual shipping and equipment documentation should take priority.

12. Product Introduction

The 20G11BC1K2JN4NNNNN is designed to provide controlled operation of large AC motors.

Instead of allowing the motor to operate only at the fixed frequency of the incoming power supply, the drive can control the electrical conditions supplied to the motor.

This allows the motor’s speed and torque behavior to be coordinated with the production process.

For example, a large pump does not necessarily need to operate at full speed all the time.

A large ventilation fan may need different airflow levels at different times.

A conveyor may require controlled acceleration and deceleration.

The variable-frequency drive provides the electrical control required for these applications.

13. Role in an Industrial Automation System

The drive can be integrated into a larger industrial automation architecture.

A typical system may contain:

PLC

↓

Industrial Ethernet Network

↓

PowerFlex 755

↓

Large AC Motor

↓

Pump / Fan / Conveyor / Process Machine

At the same time, maintenance personnel can interact locally with the drive through the operator interface.

This gives the system two practical layers of operation:

Centralized automation control

and

Local maintenance and commissioning control.

14. JN4 Operator Interface

The JN4 configuration is particularly useful when local operator access is required.

The local Enhanced LCD / Full Numeric interface allows technicians to interact with the drive directly.

Typical activities include:

• Reading drive status.
• Viewing fault information.
• Checking operating parameters.
• Entering motor data.
• Adjusting selected parameters.
• Checking output frequency.
• Checking current.
• Performing commissioning tests.
• Troubleshooting drive operation.

15. Why the JN4 Configuration Can Be Useful

The local interface becomes particularly valuable during startup and maintenance.

Imagine a large pump station where the PLC system has not yet been fully commissioned.

A technician can still work directly with the drive to verify motor parameters and basic operation.

Likewise, during maintenance, the technician can inspect the drive without depending entirely on the control-room HMI.

This can save time during:

• Startup.
• Motor replacement.
• Drive replacement.
• Troubleshooting.
• Planned shutdowns.
• Emergency maintenance.

16. Embedded Communication

The PowerFlex 755 platform supports integration into industrial Ethernet-based automation systems.

The embedded Ethernet capability can be used for communication between the drive and plant automation equipment.

Typical systems can include:

• PLCs.
• HMIs.
• SCADA.
• Supervisory control systems.
• Plant Ethernet networks.
• Maintenance systems.

This is particularly useful for large plants where several large drives need to be monitored and controlled from a central automation system.

17. EMC Filtering

The configuration uses a filtered arrangement with the CM jumper installed.

EMC performance is important in large VFD installations because high-frequency switching can create electrical noise.

The overall installation should therefore consider:

• Motor cable type.
• Shielding.
• Grounding.
• Cabinet bonding.
• Cable routing.
• Control wiring.
• Communication wiring.
• Motor-cable length.
• Separation between power and signal cables.

The internal filtering is an important part of the drive configuration, but proper EMC installation remains a system-level responsibility.

18. Dynamic Braking

The published configuration specifies no dynamic braking.

This can be appropriate for many large industrial applications where rapid deceleration is not required.

For example, a large centrifugal pump may be allowed to slow down naturally after the speed reference is reduced.

A large fan can behave similarly.

However, applications with large rotating inertia or strict stopping-time requirements should be evaluated separately.

Examples include:

• High-inertia conveyors.
• Certain centrifuges.
• Hoisting applications.
• Rapid-cycle machinery.
• High-speed material handling.

19. Main Application Areas

The 20G11BC1K2JN4NNNNN can be used in a wide range of heavy industrial applications.

Typical application categories include:

1. Water and wastewater.
2. Large pumping systems.
3. Mining.
4. Cement.
5. Material handling.
6. Industrial ventilation.
7. Large fans and blowers.
8. Process industries.
9. Cooling systems.
10. Large industrial machinery.

20. Application — Water Pumping

Large pumping systems are one of the strongest application areas for this drive.

Possible applications include:

• Raw-water intake pumps.
• Water-transfer pumps.
• Cooling-water pumps.
• Process-water pumps.
• Wastewater pumps.
• Irrigation pumps.
• Pipeline pumps.
• Industrial circulation pumps.

Variable-speed operation allows the pump to be operated according to process demand rather than simply running continuously at maximum speed.

21. Application — Wastewater Treatment

Wastewater-treatment plants can contain very large pumps and blowers.

The drive can be used for:

• Pumping stations.
• Aeration systems.
• Sludge handling.
• Water transfer.
• Process circulation.
• Large ventilation systems.

The local operator interface is also useful during maintenance because technicians can work directly at the electrical equipment while checking the associated mechanical equipment.

22. Application — Large Fans

Large fans can require substantial motor power.

Examples include:

• Furnace fans.
• Exhaust fans.
• Dust-collection fans.
• Mine ventilation fans.
• Cooling fans.
• Industrial process fans.
• Tunnel ventilation systems.

Variable-speed control allows airflow to be adjusted to actual process requirements.

23. Application — Industrial Blowers

Large blowers are common in:

• Water-treatment plants.
• Chemical processes.
• Manufacturing facilities.
• Aeration systems.
• Pneumatic material systems.
• Industrial ventilation.

The drive can provide controlled starting and speed regulation while integrating the blower motor into a larger plant control system.

24. Application — Conveyors

Large conveyors can have significant mechanical inertia.

Controlled acceleration can help reduce mechanical shock to:

• Conveyor belts.
• Gearboxes.
• Couplings.
• Shafts.
• Bearings.
• Mechanical structures.

This can be especially useful in mining and bulk-material handling.

25. Application — Mining

The high-current capability makes this model suitable for certain large mining installations.

Potential applications include:

• Ore conveyors.
• Dewatering pumps.
• Mine ventilation.
• Material handling.
• Processing machinery.
• Large auxiliary systems.

Mining environments require careful attention to dust, temperature, vibration and maintenance access.

26. Application — Cement Plants

Large cement and aggregate plants use many high-power motors.

Potential applications include:

• Process fans.
• Dust-extraction fans.
• Large conveyors.
• Crushers.
• Blowers.
• Pumps.
• Material-handling equipment.
• Ventilation systems.

The PowerFlex 755 platform is well suited to installations where many large motors need to be incorporated into one automation strategy.

27. Application — Industrial Cooling

Large manufacturing facilities may require high-capacity cooling-water systems.

The drive can control pump speed according to actual cooling requirements.

Possible advantages include:

• Better flow control.
• Controlled starting.
• Reduced mechanical stress.
• Improved process stability.
• Better coordination with plant production.

28. Application — Compressors

Certain large compressors can also benefit from variable-speed motor control.

Potential applications include:

• Industrial air compressors.
• Process compressors.
• Utility compressors.
• Refrigeration-related systems.
• Gas-handling equipment.

Compressor applications require detailed evaluation of torque, operating range and process requirements before final drive selection.

29. Major Product Advantages

Advantage	Description
Very high current capability	1,175 A output rating
High power capacity	Approximately 800 kW Light Duty
Normal Duty capacity	710 kW
Heavy Duty capacity	560 kW
Frame 9 construction	Suitable for large industrial motors
400 V AC class	Suitable for common industrial power systems
Air cooling	Appropriate for properly engineered electrical rooms
600 mm MCC-style configuration	Designed for industrial electrical lineups
Local operator interface	Convenient for commissioning and maintenance
EtherNet/IP capability	Supports networked industrial control
EMC filtering	Helps manage electrical noise
AC precharge	Suitable for high-power DC-bus architecture
PowerFlex 755 platform	Broad application flexibility
High scalability	Multiple related ratings are available
Industrial construction	Designed for demanding applications

30. Advantage — High Power

The most obvious advantage is the large amount of available output current.

With 1,175 A, the drive is capable of handling motors that would be far beyond the range of ordinary compact VFDs.

This makes it suitable for large pumps, fans, blowers, conveyors and other heavy industrial equipment.

31. Advantage — 710 kW Normal Duty Rating

The 710 kW Normal Duty rating provides a substantial capacity margin for many industrial applications.

For a continuously operating process machine, this rating can provide a useful reference point when matching the drive with the motor.

However, engineers should still verify the motor’s actual current and load profile before making the final selection.

32. Advantage — Heavy Duty Capability

The 560 kW Heavy Duty rating is important for applications where the load is more demanding.

Examples include equipment with:

• Higher starting torque.
• Frequent acceleration.
• Higher mechanical inertia.
• More demanding overload conditions.
• More severe process cycles.

The Heavy Duty rating gives engineers another way to match the drive to the actual load.

33. Advantage — Local Maintenance Interface

The JN4 configuration is useful when local access is important.

A technician standing at the drive can inspect operating information without having to walk back to a control room.

This is particularly useful in large plants where the drive may be installed hundreds of meters away from the main operator station.

34. Advantage — Network Integration

The PowerFlex 755 platform allows the drive to be incorporated into an automation network.

This means a plant can combine local drive control with centralized:

• Start/stop commands.
• Speed references.
• Fault monitoring.
• Status monitoring.
• Process control.
• Maintenance information.

The drive can therefore function as part of the complete automation system rather than operating as an isolated device.

35. Advantage — Standardized Drive Family

The PowerFlex 755 family offers multiple current and power ratings.

This makes standardization easier for large industrial facilities.

A plant may use smaller configurations for moderate-size motors and larger Frame 9 configurations for major process equipment.

The engineering and maintenance teams can therefore work with a consistent general drive architecture.

36. Recommended Same-Series Models

The following five models are useful alternatives or related configurations within the PowerFlex 755 family.

Model	Series	Voltage	Current / Rating	Frame	Depth	HIM	Weight (kg)
20G11BC910JN0NNNNN	PowerFlex 755	400 VAC	~910 A / 500 kW ND	9	600 mm	No HIM	~1,250
20G11BC1K0JN0NNNNN	PowerFlex 755	400 VAC	~1,040 A / 560 kW ND	9	600 mm	No HIM	~1,250
20G11BC1K1JN0NNNNN	PowerFlex 755	400 VAC	~1,090 A / 630 kW ND	9	600 mm	No HIM	~1,250
20G11BC1K2JN2NNNNN	PowerFlex 755	400 VAC	1,175 A / 710 kW ND	9	600 mm	Enhanced LCD	~1,246
20G11BC1K5JN2NNNNN	PowerFlex 755	400 VAC	~1,480 A / 850 kW ND	9	600 mm	Enhanced LCD	Configuration dependent

The 1K2 rating is the direct capacity class of the target model.

The 910 A, 1K0 and 1K1 configurations provide lower-capacity alternatives, while the 1K5 configuration provides a higher-capacity option.

The published 400 V rating table identifies the 1K2 class at 1,175 A / 710 kW Normal Duty, with the next larger rating class extending to approximately 1,480 A / 850 kW Normal Duty.

37. Recommended Model 1 — 20G11BC910JN0NNNNN

The 20G11BC910JN0NNNNN is a lower-capacity Frame 9 PowerFlex 755 configuration.

Parameter	Specification
Model	20G11BC910JN0NNNNN
Series	PowerFlex 755
Voltage	400 VAC class
Current	Approximately 910 A
Normal Duty	Approximately 500 kW
Heavy Duty	Approximately 400 kW
Frame	9
Cooling	Air cooled
Enclosure	IP20 / Type 1
Cabinet	600 mm MCC style
HIM	No HIM
Depth	600 mm
Dimensions	Frame 9; exact height and width configuration dependent
Weight (kg)	Approximately 1,250 kg class

This model is useful when the motor current requirement is lower than the 1,175 A capacity of the target drive.

38. Recommended Model 2 — 20G11BC1K0JN0NNNNN

The 20G11BC1K0JN0NNNNN occupies the next capacity level.

Parameter	Specification
Model	20G11BC1K0JN0NNNNN
Series	PowerFlex 755
Voltage	400 VAC class
Current	Approximately 1,040 A
Normal Duty	Approximately 560 kW
Heavy Duty	Approximately 500 kW
Frame	9
Cooling	Air cooled
Enclosure	IP20 / Type 1
Cabinet	600 mm MCC style
HIM	No HIM
Depth	600 mm
Dimensions	Frame 9; exact height and width configuration dependent
Weight (kg)	Approximately 1,250 kg class

39. Recommended Model 3 — 20G11BC1K1JN0NNNNN

The 20G11BC1K1JN0NNNNN is very close to the target rating.

Parameter	Specification
Model	20G11BC1K1JN0NNNNN
Series	PowerFlex 755
Voltage	400 VAC class
Current	Approximately 1,090 A
Light Duty	Approximately 710 kW
Normal Duty	Approximately 630 kW
Heavy Duty	Approximately 500 kW
Frame	9
Cooling	Air cooled
Enclosure	IP20 / Type 1
Cabinet	600 mm MCC style
HIM	No HIM
Depth	600 mm
Dimensions	Frame 9; exact height and width configuration dependent
Weight (kg)	Approximately 1,250 kg class

This is a practical alternative where the required motor current is slightly below the 1,175 A target rating.

40. Recommended Model 4 — 20G11BC1K2JN2NNNNN

The 20G11BC1K2JN2NNNNN is electrically very close to the target model.

Parameter	Specification
Model	20G11BC1K2JN2NNNNN
Series	PowerFlex 755
Voltage	400 VAC
Output current	1,175 A
Light Duty	Approximately 800 kW
Normal Duty	710 kW
Heavy Duty	560 kW
Frame	9
Cooling	Air cooled
Enclosure	IP20 / Type 1
Cabinet	600 mm MCC style
Local HIM	Enhanced LCD / Full Numeric
Depth	600 mm
Dimensions	Frame 9; exact height and width configuration dependent
Weight (kg)	Approximately 1,246 kg class

This is one of the most logical alternatives when the electrical capacity should remain the same but a different local-interface configuration is acceptable.

41. Recommended Model 5 — 20G11BC1K5JN2NNNNN

The 20G11BC1K5JN2NNNNN provides higher current and power capacity.

Parameter	Specification
Model	20G11BC1K5JN2NNNNN
Series	PowerFlex 755
Voltage	400 VAC
Current	Approximately 1,480 A
Normal Duty	Approximately 850 kW
Heavy Duty	Approximately 710 kW
Frame	9
Cooling	Air cooled
Enclosure	IP20 / Type 1
Cabinet	600 mm MCC style
Local HIM	Enhanced LCD / Full Numeric
Depth	600 mm
Dimensions	Frame 9; exact height and width configuration dependent
Weight (kg)	Configuration dependent; approximately 1,250 kg class

This is a logical choice when the motor’s current requirement exceeds the 1,175 A capability of the 1K2 configuration.

42. Five Same-Brand Popular or Related Models

For a broader comparison, the following models provide useful references across the same brand and related PowerFlex product families.

Model	Series	Voltage Class	Current / Power Class	Typical Application	Dimensions	Weight (kg)
20G11BC1K2JN2NNNNN	PowerFlex 755	400 VAC	1,175 A / 710 kW ND	Large pumps, fans, conveyors	600 mm deep MCC style	~1,246
20G11BC1K2JN0NNNNN	PowerFlex 755	400 VAC	1,175 A / 710 kW ND	Centralized large-motor control	600 mm deep MCC style	~1,246
20G11BC1K5JN2NNNNN	PowerFlex 755	400 VAC	~1,480 A / 850 kW ND	Larger industrial motors	600 mm deep MCC style	Configuration dependent
21G11BC1K2JN2NNNNN-ND-L1-P3	PowerFlex 755 Packaged	400 VAC	1,175 A / 710 kW ND	Packaged large-motor systems	600 mm deep MCC style	Configuration dependent
25B-D030N114	PowerFlex 525	480 VAC class	30 A class	Compact machine applications	Compact frame	Configuration dependent

The first four are more directly relevant to high-power industrial applications.

The PowerFlex 525 belongs to a considerably smaller drive class and is better suited to smaller machines rather than the large motors normally associated with the target 1,175 A configuration.

43. Recommended Related Model — 21G11BC1K2JN2NNNNN-ND-L1-P3

This is a packaged PowerFlex 755 configuration with the same major 400 V / 1,175 A / 710 kW Normal Duty / 560 kW Heavy Duty power class.

Parameter	Specification
Model	21G11BC1K2JN2NNNNN-ND-L1-P3
Series	PowerFlex 755 Packaged Drive
Voltage	400 V AC, 3 phase
Output current	1,175 A
Normal Duty	710 kW
Heavy Duty	560 kW
Frame	9
Cooling	Air cooled
Enclosure	Type 1
Cabinet depth	600 mm
Input type	AC input with precharge
Input protection	Circuit breaker
Input reactor	3%
Dynamic braking	None
Door-mounted HIM	IP20 / NEMA 1
Depth	600 mm
Dimensions	Packaged Frame 9 configuration; exact height and width configuration dependent
Weight (kg)	Configuration dependent

This model is particularly interesting for projects where a more complete packaged-drive arrangement is required.

44. JN4 Versus JN2

The JN4 and JN2 configurations are closely related.

Parameter	JN4	JN2
Model	20G11BC1K2JN4NNNNN	20G11BC1K2JN2NNNNN
Series	PowerFlex 755	PowerFlex 755
Voltage	400 VAC	400 VAC
Output current	1,175 A	1,175 A
Normal Duty	710 kW	710 kW
Heavy Duty	560 kW	560 kW
Frame	9	9
Cabinet depth	600 mm	600 mm
Cooling	Air cooled	Air cooled
Local interface	Enhanced LCD / Full Numeric	Enhanced LCD / Full Numeric
Main difference	Higher-protection HIM configuration	Standard local HIM configuration
Typical use	More demanding local-interface environment	Conventional indoor industrial environment
Weight	~1,246 kg class	~1,246 kg class

The key distinction is not the basic electrical rating.

Both belong to the same 1,175 A / 710 kW Normal Duty / 560 kW Heavy Duty power class.

The selection is mainly influenced by the local interface and installation requirements.

45. JN4 Versus JN0

Parameter	JN4	JN0
Model	20G11BC1K2JN4NNNNN	20G11BC1K2JN0NNNNN
Voltage	400 VAC	400 VAC
Current	1,175 A	1,175 A
Normal Duty	710 kW	710 kW
Heavy Duty	560 kW	560 kW
Frame	9	9
Depth	600 mm	600 mm
Local HIM	Yes	No
Centralized PLC control	Yes	Yes
Local commissioning	Excellent	More dependent on external tools/interface
Weight	~1,246 kg class	~1,246 kg class

If technicians regularly need to work at the cabinet, the JN4 configuration can be more convenient.

If the installation is completely centralized and the local interface is unnecessary, a JN0 configuration may be preferable.

46. JN4 Versus the Higher-Capacity 1K5

Parameter	1K2 JN4	1K5 JN2
Model	20G11BC1K2JN4NNNNN	20G11BC1K5JN2NNNNN
Voltage	400 VAC	400 VAC
Output current	1,175 A	Approximately 1,480 A
Normal Duty	710 kW	Approximately 850 kW
Heavy Duty	560 kW	Approximately 710 kW
Frame	9	9
Depth	600 mm	600 mm
Cooling	Air cooled	Air cooled
HIM	Enhanced LCD / Full Numeric	Enhanced LCD / Full Numeric
Application	Large motors	Larger motors
Weight	~1,246 kg class	Configuration dependent

The 1K5 becomes more attractive when the motor current is higher than 1,175 A.

47. Application Selection Guide

Application	Recommended Configuration
Large water pump	20G11BC1K2JN4
Cooling-water pump	20G11BC1K2JN4
Large centrifugal fan	20G11BC1K2JN4
Industrial blower	20G11BC1K2JN4
Large conveyor	20G11BC1K2JN4
Mining conveyor	20G11BC1K2JN4
Cement-plant fan	20G11BC1K2JN4
Large process pump	20G11BC1K2JN4
Wastewater aeration	20G11BC1K2JN4
Centralized automation	JN0 / JN2 / JN4
Local maintenance required	JN2 / JN4
More demanding local interface environment	JN4
Motor above 1,175 A	1K5 or higher class

48. Current-Class Selection

Approximate Motor Current	Relevant PowerFlex 755 Rating Class
~900 A	20G11BC910
~1,040 A	20G11BC1K0
~1,090 A	20G11BC1K1
1,175 A	20G11BC1K2
~1,465 A	20G11BC1K4
~1,480 A	20G11BC1K5
Above this range	Larger Frame 9/10 configurations

The 400 V rating tables place the 1K2 class at 1,175 A and 710 kW Normal Duty, while larger configurations increase current and power capacity.

49. Motor Selection

The drive should be selected primarily according to the motor’s actual electrical requirements.

Important motor information includes:

Motor Parameter	Importance
Motor voltage	Must match the drive voltage class
Motor current	One of the most important sizing factors
Motor power	General capacity reference
Motor frequency	Determines base operating point
Motor speed	Defines operating range
Motor torque	Determines load compatibility
Starting torque	Important for demanding loads
Overload requirement	Determines duty selection
Acceleration time	Influences current demand
Deceleration time	Influences braking requirements
Duty cycle	Influences thermal loading
Cable length	Affects installation and EMC
Motor insulation	Important for VFD operation

50. Installation Considerations

The installation of a 1,175 A drive requires considerably more planning than the installation of a small VFD.

The project should consider:

• Incoming power capacity.
• Protective-device coordination.
• Short-circuit current.
• Power-cable sizing.
• Motor-cable sizing.
• Grounding.
• EMC.
• Cabinet ventilation.
• Heat dissipation.
• Service access.
• Transportation.
• Floor loading.
• Cable-entry arrangements.

51. Cooling and Ventilation

The drive uses an air-cooled design.

The electrical room therefore needs adequate ventilation and temperature management.

Maintenance personnel should periodically inspect:

• Cooling fans.
• Air passages.
• Ventilation openings.
• Dust accumulation.
• Cabinet temperature.
• Electrical-room temperature.
• Signs of excessive thermal stress.

A high-power drive operating in a poorly ventilated electrical room can experience unnecessary thermal stress.

52. Maintenance

A practical preventive-maintenance program can include:

• Fan inspection.
• Cabinet cleaning.
• Power-terminal inspection.
• Grounding inspection.
• Motor-cable inspection.
• Control-wiring inspection.
• Communication inspection.
• Parameter backup.
• Fault-history review.
• Alarm-history review.
• Temperature monitoring.
• Ventilation inspection.

53. Parameter Backup

A parameter backup is strongly recommended after commissioning.

The backup should contain the final operating configuration.

Important information can include:

• Motor nameplate data.
• Speed limits.
• Acceleration time.
• Deceleration time.
• Control mode.
• Start command source.
• Speed-reference source.
• Network configuration.
• I/O configuration.
• Fault configuration.
• Process parameters.

Keeping a current parameter backup can significantly reduce downtime after equipment replacement.

54. Mechanical Handling

The approximate 1,246 kg weight class means that the equipment must be treated as heavy industrial machinery during transportation and installation.

The installation plan should consider:

• Delivery access.
• Door dimensions.
• Floor capacity.
• Forklift capacity.
• Crane requirements.
• Lifting points.
• Temporary storage.
• Final installation position.
• Maintenance access.

This is particularly important for projects where the equipment has to be moved through an existing factory or electrical room.

55. Electrical Room Requirements

A suitable electrical room should provide:

• Adequate ventilation.
• Controlled temperature.
• Suitable humidity.
• Sufficient service clearance.
• Proper lighting.
• Adequate cable space.
• Proper grounding.
• Appropriate fire protection.
• Safe electrical isolation arrangements.

The physical size and weight of the drive should be considered during the architectural and electrical-room design stage rather than after the equipment arrives.

56. Commissioning Procedure

A practical commissioning sequence can include the following.

Step 1 — Verify the Model

Confirm that the installed unit is:

20G11BC1K2JN4NNNNN

This is important because the PowerFlex catalog number contains information about voltage class, rating, enclosure, filtering, operator interface and other configuration characteristics.

Step 2 — Verify Incoming Power

Confirm:

• Voltage.
• Phase.
• Frequency.
• Grounding.
• Protective equipment.

Step 3 — Verify Motor Data

Record the motor nameplate:

• Voltage.
• Current.
• Frequency.
• Power.
• Speed.
• Power factor.
• Efficiency.
• Service factor where applicable.

Step 4 — Configure the Drive

Enter the correct motor and application parameters.

Do not simply copy parameters from another motor unless the motors and application are genuinely equivalent.

Step 5 — Check Motor Rotation

Verify rotation before connecting the motor to the full mechanical process.

This is particularly important for pumps, fans and conveyors.

Step 6 — Perform a Low-Speed Test

Operate the motor at a controlled low speed.

Check:

• Current.
• Vibration.
• Rotation.
• Motor noise.
• Drive temperature.
• Mechanical response.

Step 7 — Increase Speed Gradually

Observe:

• Current.
• Acceleration.
• Mechanical behavior.
• Temperature.
• Process response.

Step 8 — Test Network Communication

Verify communication between:

• PLC.
• HMI.
• Network.
• Drive.
• Supervisory system.

57. Typical Plant Architecture

A large installation can use the drive in a structure such as:

Plant SCADA

↓

Operator HMI

↓

PLC / Controller

↓

Industrial Ethernet

↓

PowerFlex 755

↓

20G11BC1K2JN4NNNNN

↓

400 V AC Motor

↓

Pump / Fan / Conveyor / Process Equipment

The local HIM provides another access point for maintenance personnel.

58. Why Choose the 20G11BC1K2JN4NNNNN?

There are several practical reasons to select this model.

The first is its 1,175 A output capability.

The second is its 710 kW Normal Duty rating.

The third is the 560 kW Heavy Duty rating.

The fourth is its Frame 9 high-power construction.

The fifth is the 400 V AC three-phase design.

The sixth is the 600 mm deep MCC-style cabinet arrangement.

The seventh is the local Enhanced LCD / Full Numeric operator interface.

The eighth is its ability to participate in a modern industrial automation architecture.

59. Product Summary Table

Category	Detailed Specification
Model	20G11BC1K2JN4NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product family	PowerFlex 750-Series
Product type	755 AC Packaged Drive
Product status	Active
Input voltage	400 VAC
Input phase	3 phase
Output current	1,175 A
Light Duty	Approximately 800 kW
Normal Duty	710 kW
Heavy Duty	560 kW
Frame	9
Cooling	Air cooled
Enclosure	IP20 / Type 1
Cabinet style	600 mm Deep MCC Style
Input type	AC Input with Precharge
EMC configuration	Filtered
CM jumper	Installed
Dynamic braking	None
Local interface	Enhanced LCD / Full Numeric HIM
Communication	Embedded EtherNet/IP
Typical applications	Pumps, fans, blowers, conveyors, mining, cement, water treatment, process machinery
Depth	600 mm
Overall dimensions	Frame 9; exact height and width configuration dependent
Weight (kg)	Approximately 1,246 kg class

60. Final Product Assessment

The 20G11BC1K2JN4NNNNN is a high-capacity industrial variable-frequency drive belonging to the Allen-Bradley PowerFlex 755 series.

Its electrical rating of 1,175 A, combined with 710 kW Normal Duty and 560 kW Heavy Duty, puts it firmly into the large industrial motor-control category.

It is therefore not intended for ordinary small machinery.

Its natural application environment is large-scale industrial equipment where motor power, process control and reliable automation integration are important.

The Frame 9 construction and 600 mm deep MCC-style configuration also indicate that mechanical planning is a major part of installation.

The final cabinet height and width should be obtained from the applicable mechanical drawing, while the approximate 1,246 kg weight class should be considered when planning transportation, lifting and floor loading.

The JN4 configuration is especially attractive when local operator access is required.

For a large pump, fan, conveyor or process motor, technicians can use the local interface during commissioning and maintenance while the drive remains connected to the plant’s centralized automation system.

The PowerFlex 755 platform also provides a useful range of related ratings.

The lower-capacity 20G11BC910, 20G11BC1K0 and 20G11BC1K1 configurations can be considered when the motor current is lower.

The 20G11BC1K2 family is the direct rating class for the target product.

The larger 20G11BC1K4 and 20G11BC1K5 configurations become relevant when the motor requires additional current capacity.

For the same electrical rating, the 20G11BC1K2JN2NNNNN is one of the closest alternatives.

The main consideration between JN2 and JN4 is the local-interface configuration and the environmental requirements of the installation rather than the basic 1,175 A power rating.

The 20G11BC1K2JN0NNNNN is another closely related choice where local operator access is not required.

For a fully centralized PLC/HMI installation, this can be a practical configuration.

For a plant where maintenance personnel frequently operate directly at the cabinet, the JN2 or JN4 configurations are generally more convenient.

The 20G11BC1K5 class is the direction to consider when the required motor current exceeds the 1,175 A capability.

The published 400 V rating information places the 1K5 class at approximately 1,480 A and 850 kW Normal Duty, making it a natural higher-capacity comparison for the 1K2 configuration.

In practical terms, the 20G11BC1K2JN4NNNNN can be summarized as a 400 V AC, three-phase, 1,175 A, Frame 9, air-cooled PowerFlex 755 industrial AC drive with approximately 800 kW Light Duty capability, 710 kW Normal Duty capability, 560 kW Heavy Duty capability, 600 mm MCC-style depth, filtered configuration, AC input with precharge, no dynamic braking and a local Enhanced LCD / Full Numeric operator interface.

Its strongest applications are large pumps, fans, blowers, conveyors, water-treatment equipment, mining machinery, cement-plant equipment, cooling systems and other high-power industrial processes.

The most important selection point is not simply the motor’s kW rating.

For a real engineering project, the motor’s nameplate current, voltage, torque requirement, overload profile, acceleration/deceleration requirements, operating speed range, braking requirements, environmental conditions and installation arrangement should all be reviewed before final selection.

Overall, the 20G11BC1K2JN4NNNNN is a strong high-power drive choice for industrial plants that need substantial motor-current capacity together with local commissioning capability and integration into a centralized automation system.