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Allen-Bradley 20G14NF020JN0NNNNN PowerFlex 755 AC Drive – Detailed Product Introduction, Technical Parameters, Applications, Advantages, and Related Models

1. Product Overview

The Allen-Bradley 20G14NF020JN0NNNNN is a PowerFlex 755 AC drive designed for industrial motor control applications where a common DC bus architecture is required. It belongs to the PowerFlex 755 family and is configured as a DC-input, air-cooled, open-type drive with a nominal 932 VDC input system.

The model is rated at 20 A for Normal Duty operation and provides a 15 kW Normal Duty motor rating. Under Heavy Duty conditions, the continuous output rating is 15 A with an 11 kW motor rating. The drive is assigned to Frame 6 and is intended for installation within an appropriate industrial control cabinet or electrical enclosure.

Unlike a conventional standalone AC-input drive, the 20G14NF020JN0NNNNN is part of the PowerFlex 755 common-bus configuration. This makes it particularly suitable for systems in which several drives share a centralized DC power architecture, regenerative power can be redistributed between drives, or the machine designer wants greater flexibility in DC-bus power management.

The “JN” configuration is important when identifying the exact product. The filtering/common-mode capacitor jumper configuration is installed, while the internal dynamic-braking transistor is not included. The distinction between the JN and JA versions is therefore significant when replacing equipment or designing a new system.

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2. Brand and Series Information

Parameter	Description
Brand	Allen-Bradley
Product Family	PowerFlex
Series	PowerFlex 755
Product Type	AC Drive / Variable Frequency Drive
Configuration	Common DC Bus Drive
Input Architecture	DC Input with Precharge
Nominal DC Bus Voltage	932 VDC
AC Motor Output	Variable-frequency three-phase motor output
Frame Size	Frame 6
Cooling Method	Air Cooled
Enclosure Style	Open Type
Dynamic Braking	None – internal dynamic braking transistor not included
Filtering / CM Jumper	Filtered, CM jumper installed
Operator Interface	Blank / No HIM
Primary Model	20G14NF020JN0NNNNN

The product belongs specifically to the PowerFlex 755 platform. The 20G14 family designation identifies a common-bus version of the PowerFlex 755, while the remaining characters define voltage class, current rating, frame, filtering configuration, dynamic-braking configuration, and other product selections.

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3. Detailed Technical Parameters

The following table summarizes the principal parameters associated with the 20G14NF020JN0NNNNN configuration.

Technical Parameter	Specification
Model Number	20G14NF020JN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Type	AC Drive
Drive Configuration	Common DC Bus
Nominal DC Input	932 VDC
Input Type	DC Input with Precharge
Output Current – Normal Duty	20 A continuous
Normal Duty 1-Minute Current	22 A
Normal Duty 3-Second Current	30 A
Normal Duty Motor Rating	15 kW
Heavy Duty Continuous Current	15 A
Heavy Duty 1-Minute Current	22.5 A
Heavy Duty 3-Second Current	30 A
Heavy Duty Motor Rating	11 kW
Frame Size	Frame 6
Cooling	Air Cooled
Enclosure	Open Type
Filtering	Filtered
Common-Mode Capacitor Jumper	Installed
Internal Dynamic Braking Transistor	None
Operator Interface	Blank / No HIM
Mounting Concept	Cabinet / Panel Mount
Typical Application	Industrial motor control
Approximate Dimensions	665.5 × 308 × 346.4 mm H × W × D
Approximate Weight	38.6 kg
Intended Power Architecture	High-voltage common DC bus
Motor Output	Three-phase variable-frequency output

The published selection information lists the 20 A version with 15 kW Normal Duty and 11 kW Heavy Duty capability, with 22 A and 30 A available for the specified Normal Duty overload levels. The same table identifies the model as Frame 6.

Dimension and weight note: the dimensions and 38.6 kg figure should be treated as an engineering reference for the Frame 6 configuration rather than a substitute for the exact mechanical drawing or shipping documentation for an individual unit. Actual shipping weight can differ depending on packaging and supplied accessories.

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4. Understanding the Model Number

The model number 20G14NF020JN0NNNNN contains useful information about the drive configuration.

Model Section	Meaning
20G	PowerFlex 755 AC drive family
14	Common-bus / DC-input configuration
NF	Voltage and configuration designation for the 690 V class common-bus family
020	20 A output-current class
J	Filtering and common-mode capacitor jumper installed
N	No internal dynamic braking transistor
0	Product option position
NNNNN	Additional option positions / default selections

The “020” section is particularly important because it identifies the 20 A output-current class. In the same 932 VDC common-bus selection table, the 12 A, 15 A, 20 A, 23 A, 30 A, 34 A, 46 A, 50 A and higher versions are arranged according to their output-current capacity and motor-power rating.

The “J” configuration indicates that filtering is provided and the common-mode capacitor jumper is installed. The “N” dynamic-braking selection indicates that an internal dynamic-braking transistor is not provided.

This distinction matters in applications with significant deceleration energy. A drive without an internal dynamic-braking transistor should not be treated as though it has the same braking hardware as a corresponding “JA” version.

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5. Product Construction and Design

The 20G14NF020JN0NNNNN is an air-cooled PowerFlex 755 drive in an open-type Frame 6 construction.

The open-type design is intended for integration into an industrial electrical enclosure rather than being used as a completely self-contained outdoor device. The cabinet designer therefore needs to provide suitable environmental protection, ventilation, clearance, grounding, wiring, and thermal management.

The Frame 6 form factor provides a practical balance between power capability and cabinet integration. For the 20 A version, the drive occupies substantially more physical space than a small low-power motor drive, but it provides the electrical capacity required for medium-power industrial motors operating from a high-voltage DC bus.

The approximate Frame 6 envelope is about 665.5 mm high × 308 mm wide × 346.4 mm deep. This dimension should be considered during cabinet layout, especially when incoming DC-bus wiring, output motor cables, ventilation paths, and service access are taken into account.

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6. DC Input and Common-Bus Architecture

One of the most important characteristics of the 20G14NF020JN0NNNNN is its DC-input architecture.

Instead of receiving conventional three-phase AC directly at the drive input, the unit is intended for a common DC-bus system. The published selection data identifies this product family as a 932 VDC nominal input common-bus drive.

A common DC bus can be particularly useful in machinery containing multiple motor drives. Instead of treating every drive as an entirely independent power conversion system, the machine can distribute DC power through a shared bus.

This architecture can provide considerable flexibility for systems in which multiple motors operate together. For example, one motor may be accelerating while another is decelerating. Depending on the complete system design, energy associated with one axis can potentially be utilized by another axis rather than being handled entirely by independent drive input sections.

The common-bus arrangement can also simplify certain large machine architectures because the power distribution strategy can be centralized.

However, common-bus systems require careful engineering. DC voltage levels are high, and isolation, precharge, discharge, grounding, protective devices, bus capacitance, cable routing, and maintenance procedures must all be considered as part of the overall installation.

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7. Normal Duty and Heavy Duty Ratings

The 20G14NF020JN0NNNNN has two important motor-rating categories: Normal Duty and Heavy Duty.

For Normal Duty operation, the drive provides a continuous output current of 20 A, with a 1-minute rating of 22 A and a 3-second rating of 30 A. The corresponding Normal Duty motor rating is 15 kW.

For Heavy Duty operation, the continuous output current is 15 A, with 22.5 A available for one minute and 30 A for three seconds. The corresponding Heavy Duty motor rating is 11 kW.

Duty Rating	Continuous Current	1-Minute Current	3-Second Current	Motor Rating
Normal Duty	20 A	22 A	30 A	15 kW
Heavy Duty	15 A	22.5 A	30 A	11 kW

This distinction is important when selecting the drive for the actual machine load.

A conveyor carrying relatively stable material may have a very different current profile from a mixer, crusher, hoist, or machine with frequent acceleration and deceleration. The motor nameplate current and actual load profile should therefore be evaluated rather than selecting the drive solely by motor horsepower or kilowatt value.

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8. Dynamic Braking Configuration

The 20G14NF020JN0NNNNN does not include an internal dynamic-braking transistor.

This is one of the main configuration differences between this model and a corresponding model using the “JA” option. Technical documentation identifies “A” as the internal dynamic-braking transistor installed and “N” as no internal dynamic-braking transistor.

This does not mean that the drive cannot be used in applications involving deceleration. It means that the braking strategy must be designed appropriately for the complete system.

For applications with modest deceleration requirements, the absence of an internal braking transistor may be perfectly acceptable.

For applications with frequent stopping, high inertia, rapid deceleration, vertical loads, or substantial regenerative energy, the braking arrangement requires more careful engineering.

The correct braking solution depends on the motor, reflected inertia, speed, stopping time, duty cycle, DC-bus architecture, and required braking performance.

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9. Filtering and Common-Mode Capacitor Jumper

The 20G14NF020JN0NNNNN is configured with filtering and the common-mode capacitor jumper installed.

This configuration is useful where the electrical installation requires attention to conducted electrical noise and common-mode behavior.

Filtering can be particularly valuable in industrial environments containing multiple variable-speed drives, sensitive control equipment, long motor cables, instrumentation, and other electrical loads.

The filter and common-mode configuration should nevertheless be considered together with the grounding and cable installation method. A drive’s EMC performance is not determined by the drive alone; cabinet construction, grounding, cable shielding, motor connection, routing, and installation practices all contribute to the final system performance.

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10. Operator Interface Configuration

The 20G14NF020JN0NNNNN is specified with a blank / no HIM configuration.

This means the drive is not supplied with a door-mounted human interface module as part of this catalog configuration.

For an automated machine, this can be an advantage because the drive can be controlled and monitored through the machine’s control architecture rather than requiring a permanently mounted local operator panel.

For commissioning and maintenance, however, the system designer should provide an appropriate method for parameter access, diagnostics, fault handling, and service operations.

The absence of a factory-mounted HIM also gives the panel designer more freedom regarding the physical arrangement of the control cabinet.

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11. Main Product Advantages

11.1 Designed for Common DC-Bus Systems

The strongest advantage of the 20G14NF020JN0NNNNN is its common-bus architecture.

It is intended for systems where several drives may share a high-voltage DC power system. This can be beneficial in large machines containing multiple coordinated motor axes.

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11.2 15 kW Normal Duty Capacity

The 20 A Normal Duty rating supports a 15 kW motor rating, providing useful capacity for medium-power industrial machinery.

This makes the model appropriate for applications that require more capacity than small machine drives but do not require a much larger Frame 6 or Frame 7 power class.

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11.3 Heavy Duty Capability

The unit also provides an 11 kW Heavy Duty rating with a 15 A continuous output current and short-duration overload capability.

This allows the same drive class to be evaluated for applications where the load has greater starting torque or intermittent overload requirements.

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11.4 Integrated Precharge Concept

The DC-input configuration incorporates a precharge arrangement as part of the drive architecture.

Precharge is particularly important in high-voltage DC-bus systems because the drive contains substantial DC-link capacitance. Controlled charging helps manage the initial energization of the DC bus.

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11.5 Air-Cooled Construction

Air cooling provides a familiar thermal-management method for industrial control cabinets.

Proper cabinet ventilation remains essential. The actual installation must account for heat dissipation, ambient temperature, airflow, spacing, and the thermal characteristics of other equipment installed nearby.

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11.6 Filtered Configuration

The factory configuration includes filtering and a common-mode capacitor jumper arrangement.

This makes the drive well suited to installations where electrical noise management is an important design consideration.

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11.7 No Internal Braking Transistor

Although this is technically an option rather than an advantage in every application, the absence of an internal dynamic-braking transistor can be useful where regenerative braking is handled elsewhere in the system or where external braking hardware is intentionally selected.

It also gives the system designer a clear distinction between the power-conversion drive and the braking architecture.

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12. Typical Industrial Applications

12.1 Conveyor Systems

The 20G14NF020JN0NNNNN can be considered for medium-power conveyor applications, particularly in systems where multiple conveyor sections are controlled from a common DC-bus architecture.

Conveyors often require controlled acceleration and deceleration, stable motor speed, and reliable operation over long periods.

A common DC bus can be particularly attractive for machines containing several interconnected conveyor motors.

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12.2 Material Handling Machinery

Material handling systems frequently contain several motors operating in a coordinated manner.

The PowerFlex 755 platform is suitable for applications where motor speed and torque must be managed as part of a larger machine-control system.

The 20 A current class provides a practical option for medium-sized motors while retaining the common-bus architecture.

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12.3 Pumps

The drive can also be considered for industrial pumping systems requiring variable-speed motor operation.

Typical applications may include process pumps, circulation systems, transfer pumps, and other variable-speed pumping equipment.

The actual suitability depends on motor current, duty cycle, speed range, and the characteristics of the pump load.

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12.4 Fans and Blowers

Fans and blowers are another possible application.

Variable-speed control can allow the machine designer to adjust airflow according to process demand rather than operating the motor continuously at a fixed speed.

For fan-type loads, the Normal Duty rating can be especially relevant because the current profile can differ substantially from high-torque machinery.

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12.5 Mixers and Process Equipment

Mixers and process machinery can place greater demands on motor torque, particularly during startup or when material viscosity changes.

For these applications, the Heavy Duty rating should be examined carefully.

The 11 kW Heavy Duty rating of this model can make it suitable for certain medium-size process machines, provided that the motor’s nameplate current and overload requirements remain within the drive’s capabilities.

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12.6 Machine Tools

The PowerFlex 755 family can also be considered for machine-tool and production equipment applications requiring controlled motor speed.

The exact suitability depends on spindle or auxiliary motor requirements, acceleration characteristics, speed range, feedback requirements, and the machine’s overall control system.

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12.7 Large Multi-Drive Machines

This is one of the more important application categories for the 20G14NF020JN0NNNNN.

A common-bus drive is naturally suited to machines containing multiple motor drives where the designer wants to establish a centralized DC power architecture.

Examples can include material-processing machinery, production lines, converting equipment, coordinated conveyor systems, and other multi-axis industrial machines.

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13. Installation and Cabinet Considerations

Because the 20G14NF020JN0NNNNN is an open-type Frame 6 drive, cabinet integration is an important part of the overall design.

The approximate physical envelope is:

Mechanical Parameter	Approximate Value
Height	665.5 mm
Width	308 mm
Depth	346.4 mm
Approximate Weight	38.6 kg
Frame	6
Cooling	Air Cooled
Mounting	Panel / Cabinet Integration
Enclosure Style	Open Type

The cabinet must provide adequate physical clearance around the drive and sufficient airflow for heat removal.

The approximately 38.6 kg unit weight should also be considered when designing the mounting structure, particularly where the drive is mounted on a removable panel or where cabinet transportation creates additional mechanical loading.

High-voltage DC wiring should be arranged carefully, with suitable separation from low-level control and communication wiring.

The cabinet design should also provide appropriate grounding and protective measures.

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14. Motor Selection Considerations

The 20G14NF020JN0NNNNN should be selected according to the actual motor current rather than simply matching the motor’s nominal kW rating.

For Normal Duty operation, the reference motor rating is 15 kW at a continuous drive output current of 20 A.

For Heavy Duty operation, the reference motor rating is 11 kW at a continuous drive output current of 15 A.

A motor with a nominal rating close to these values may still require a different drive if its actual full-load current is higher.

The motor’s nameplate voltage, current, frequency, power, speed, overload requirements, and operating environment should all be checked during final selection.

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15. Related PowerFlex 755 Common-Bus Models

The following five models are closely related to the 20G14NF020JN0NNNNN. They use the same general 932 VDC common-bus PowerFlex 755 family and are useful when selecting a lower- or higher-capacity alternative.

Model	Nominal DC Input	Normal Duty Current	Normal Duty kW	Heavy Duty Current	Heavy Duty kW	Frame	Dynamic Braking
20G14NF012JN0NNNNN	932 VDC	12 A	7.5 kW	9 A	5.5 kW	6	None
20G14NF015JN0NNNNN	932 VDC	15 A	11 kW	12 A	7.5 kW	6	None
20G14NF023JN0NNNNN	932 VDC	23 A	18.5 kW	20 A	15 kW	6	None
20G14NF030JN0NNNNN	932 VDC	30 A	22 kW	23 A	18.5 kW	6	None
20G14NF050JN0NNNNN	932 VDC	50 A	45 kW	46 A	37 kW	6	None

The five models above form a useful progression around the 20 A model. The 12 A and 15 A versions are suitable when a smaller motor is involved, while the 23 A, 30 A, and 50 A models provide progressively greater capacity. The published selection table confirms the corresponding current and kW ratings.

For all of these JN configurations, the internal dynamic-braking transistor is not included. This is a key point when comparing them with JA versions.

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16. Five Related Same-Series Models with More Detailed Parameters

Model	DC Input	Normal Duty	Heavy Duty	Frame	Filter / CM Jumper	Dynamic Braking	Approx. Dimensions*	Approx. Weight*
20G14NF012JN0NNNNN	932 VDC	12 A / 7.5 kW	9 A / 5.5 kW	6	Filtered / Installed	None	665.5 × 308 × 346.4 mm	38.6 kg
20G14NF015JN0NNNNN	932 VDC	15 A / 11 kW	12 A / 7.5 kW	6	Filtered / Installed	None	665.5 × 308 × 346.4 mm	38.6 kg
20G14NF023JN0NNNNN	932 VDC	23 A / 18.5 kW	20 A / 15 kW	6	Filtered / Installed	None	665.5 × 308 × 346.4 mm	38.6 kg
20G14NF030JN0NNNNN	932 VDC	30 A / 22 kW	23 A / 18.5 kW	6	Filtered / Installed	None	665.5 × 308 × 346.4 mm	38.6 kg
20G14NF050JN0NNNNN	932 VDC	50 A / 45 kW	46 A / 37 kW	6	Filtered / Installed	None	665.5 × 308 × 346.4 mm	38.6 kg

*The dimensions and weight shown here are engineering references based on the common Frame 6 configuration. The exact mechanical drawing and product-specific documentation should be used for final cabinet and shipping calculations.

The current and power ratings in this table follow the common-bus selection data.

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17. Five Commonly Selected Allen-Bradley PowerFlex 755 Models

The following models are useful alternatives when comparing the 20G14NF020JN0NNNNN with other PowerFlex 755 configurations. They cover different voltage classes and power ranges, making them useful for evaluating a broader selection of the same product family.

Model	Input Voltage Class	Current	Normal Duty Rating	Heavy Duty Rating	Frame	Input Configuration	Dynamic Braking
20G14NF015JA0NNNNN	690 VAC / common-bus class	15 A	11 kW	7.5 kW	6	DC input with precharge	Internal transistor
20G14NF020JA0NNNNN	690 VAC / common-bus class	20 A	15 kW	11 kW	6	DC input with precharge	Internal transistor
20G14NF050JA0NNNNN	690 VAC / common-bus class	50 A	45 kW	37 kW	6	DC input with precharge	Internal transistor
20G14FD077JA0NNNNN	480 VAC	77 A	60 HP	50 HP	5	DC input with precharge	Internal transistor
20G14FC085JA0NNNNN	400 VAC	85 A	45 kW	37 kW	5	DC input with precharge	Internal transistor

These models are particularly useful for comparison because the “JA” configuration incorporates an internal dynamic-braking transistor, whereas the requested 20G14NF020JN0NNNNN uses the “JN” configuration without an internal dynamic-braking transistor.

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18. 20G14NF020JN0NNNNN vs. 20G14NF020JA0NNNNN

The two models can look almost identical when only the main current and power ratings are considered, but their braking configurations are different.

Parameter	20G14NF020JN0NNNNN	20G14NF020JA0NNNNN
Current	20 A	20 A
Normal Duty Power	15 kW	15 kW
Heavy Duty Power	11 kW	11 kW
Frame	6	6
Nominal DC-Bus Class	932 VDC	932 VDC
Filtering	Filtered	Filtered
CM Jumper	Installed	Installed
Dynamic Braking Transistor	None	Installed
Cooling	Air Cooled	Air Cooled
Approx. Dimensions	665.5 × 308 × 346.4 mm	665.5 × 308 × 346.4 mm
Approx. Weight	38.6 kg	38.6 kg

The published technical coding explains that the dynamic-braking selection differentiates these configurations: “A” indicates an internal dynamic-braking transistor, while “N” indicates that the internal transistor is not provided.

Therefore, when replacing a drive, it is not sufficient to match only the voltage, current, and kW rating. The exact catalog number should be checked because the braking configuration can affect the overall machine design.

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19. Why the 20G14NF020JN0NNNNN Can Be a Good Choice

The 20G14NF020JN0NNNNN is especially attractive when the machine already uses, or is being designed around, a high-voltage common DC bus.

Its 20 A Normal Duty rating gives it enough capacity for a 15 kW motor under the specified duty classification, while its 11 kW Heavy Duty rating makes it suitable for a range of more demanding applications when the actual motor current and overload requirements fall within the drive’s limits.

The Frame 6 package provides a standardized physical platform within the 20G14 common-bus family.

The filtered configuration and installed common-mode capacitor jumper make the unit convenient for installations where electrical-noise management is part of the system design.

The absence of an internal dynamic-braking transistor is also a deliberate configuration choice. It can be appropriate for systems where regenerative energy is managed through the common DC bus or through a separately engineered braking arrangement.

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20. Selection Recommendations

When considering the 20G14NF020JN0NNNNN for a new machine, several points should be reviewed before final selection.

First, verify the motor’s actual full-load current.

Second, determine whether the application should be evaluated under Normal Duty or Heavy Duty.

Third, verify the DC-bus voltage and the complete power-distribution architecture.

Fourth, determine whether the application requires dynamic braking.

Fifth, confirm the cabinet dimensions and cooling requirements.

Sixth, consider the communication and control architecture of the complete machine.

Seventh, check whether the absence of a factory-mounted HIM is appropriate for the intended maintenance strategy.

These checks are particularly important in high-voltage common-bus systems because the drive is only one part of the overall power architecture.

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21. Practical Application Matching Guide

Application	Suitability	Main Consideration
Conveyor	Excellent candidate	Starting torque and acceleration
Material handling	Excellent candidate	Load variation and coordinated drives
Pump	Good candidate	Pump load profile and speed range
Fan / blower	Good candidate	Normal Duty current requirements
Mixer	Good candidate	Starting and overload torque
Process machinery	Good candidate	Continuous operation and thermal management
Machine tools	Good candidate	Speed control and machine-cycle requirements
Multi-drive production line	Excellent candidate	Common DC-bus architecture
High-inertia machine	Requires careful review	Regenerative energy and braking
Hoisting / vertical load	Requires detailed engineering	Braking and load-holding requirements

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22. Main Advantages at a Glance

Advantage	Description
Common DC-Bus Design	Suitable for centralized high-voltage DC power architectures
20 A Output Class	Provides 15 kW Normal Duty capacity
Heavy Duty Capability	Provides 11 kW Heavy Duty capacity
Frame 6 Platform	Suitable for medium-power industrial installations
Air Cooling	Familiar and practical cabinet thermal-management method
Filtered Configuration	Helps support electrical-noise management
CM Jumper Installed	Factory configuration for the common-mode capacitor arrangement
No Internal Braking Transistor	Suitable where braking is handled elsewhere
Open-Type Construction	Flexible for cabinet integration
No HIM Configuration	Useful for systems using centralized machine controls
PowerFlex 755 Family	Provides a broad range of closely related ratings

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23. Final Product Summary

The Allen-Bradley 20G14NF020JN0NNNNN is a PowerFlex 755 common-bus AC drive intended for industrial motor-control systems using a high-voltage DC power architecture.

Its key electrical rating is 20 A Normal Duty, corresponding to 15 kW Normal Duty, while the Heavy Duty rating is 15 A continuous with an 11 kW Heavy Duty motor rating. The model is a Frame 6, air-cooled, open-type design intended for cabinet integration.

The drive uses a nominal 932 VDC common-bus input, includes a precharge arrangement, and is configured with filtering and the common-mode capacitor jumper installed.

One of the most important characteristics is that the model has no internal dynamic-braking transistor. This makes it different from the corresponding JA configuration and means that the braking strategy should be considered separately when designing or modifying a machine.

With its 20 A output class, 15 kW Normal Duty capability, Frame 6 construction, filtered configuration, and common DC-bus architecture, the 20G14NF020JN0NNNNN is well suited to medium-power industrial equipment and multi-drive systems.

For applications such as conveyors, material handling, pumps, fans, blowers, mixers, process machinery, machine tools, and larger coordinated production equipment, the model provides a useful combination of power capacity and common-bus flexibility.

For final procurement or replacement, the most important points to verify are the exact catalog number, motor nameplate current, duty classification, DC-bus voltage, braking requirements, cabinet dimensions, cooling arrangement, and required control/interface configuration.