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Product Overview

The Allen Bradley 20F1ANC456JN0NNNNN PowerFlex 753 AC Drive is a high-power, air-cooled variable frequency drive designed for controlling large three-phase AC motors in industrial automation systems. It is part of the PowerFlex 753 family and is configured for 400 VAC three-phase input, 456 A output current, 250 kW normal-duty operation, and 200 kW heavy-duty operation. The drive uses a Frame 7 construction and forced-air cooling.

The exact catalog number 20F1ANC456JN0NNNNN includes embedded I/O, standard protection, AC input with precharge, no DC terminals, filtered input, CM jumper installed, no dynamic-braking transistor, and no HIM. Its enclosure designation is IP20/IP00, NEMA/UL Open Type.

For physical installation, the supplied product dimensions are 881.5 × 349.6 × 430 mm, with a supplied weight of 48 kg. Technical data for this configuration lists the physical dimensions as approximately 881.5 mm high, 430 mm wide, and 349.6 mm deep, with a 48 kg weight.

This drive is particularly suitable for large conveyors, pumps, fans, blowers, processing machinery, material-handling systems, and other industrial equipment where high motor power and adjustable-speed control are required.

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Product Identification

Parameter	Specification
Manufacturer	Allen Bradley / Rockwell Automation
Product Family	PowerFlex 753
Catalog Number	20F1ANC456JN0NNNNN
Product Type	PowerFlex 753 AC Drive
Cooling	Forced Air
Input Voltage	400 VAC
Input Phase	3 Phase
Output Current	456 A
Normal-Duty Rating	250 kW
Heavy-Duty Rating	200 kW
Frame Size	Frame 7
Input Type	AC Input with Precharge
DC Terminals	None
Dynamic Braking	None
Filtering	Filtered
CM Jumper	Installed
Embedded I/O	Yes
HIM	Blank / No HIM
Enclosure	IP20/IP00, NEMA/UL Open Type
Dimensions	881.5 × 349.6 × 430 mm
Weight	48 kg

Rockwell Automation identifies 20F1ANC456JN0NNNNN as an active PowerFlex 753 configuration with 456 A output, 250 kW normal-duty capacity, 200 kW heavy-duty capacity, 400 VAC three-phase input, Frame 7 construction, forced-air cooling, embedded I/O, filtered input, and no dynamic-braking transistor.

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Technical Specifications

Technical Item	Specification
Brand	Allen Bradley
Series	PowerFlex 753
Model	20F1ANC456JN0NNNNN
Drive Category	Variable Frequency AC Drive
Input Voltage	400 VAC
Input Phase	Three Phase
Output Current	456 A
Normal Duty Power	250 kW
Heavy Duty Power	200 kW
Frame	7
Cooling	Forced Air
Input Configuration	AC Input with Precharge
DC Terminals	No
Dynamic Braking Transistor	No
EMC / Filtering	Filtered
CM Jumper	Installed
Embedded I/O	Yes
HIM	No HIM
Enclosure	IP20/IP00, NEMA/UL Open Type
Height	881.5 mm
Width	430 mm
Depth	349.6 mm
Weight	48 kg
Operating Temperature	-20 to 60 °C
Storage Temperature	-40 to 70 °C

The published technical data identifies the 400 V, 456 A, 250 kW normal-duty and 200 kW heavy-duty configuration, Frame 7, IP20, 48 kg weight, and the environmental temperature ranges shown above.

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What Is the Allen Bradley 20F1ANC456JN0NNNNN?

The 20F1ANC456JN0NNNNN is a high-capacity PowerFlex 753 AC drive designed to regulate the speed and torque of large industrial AC motors.

A typical system can be represented as:

Three-Phase AC Supply

↓

PowerFlex 753 Drive

↓

Variable-Frequency AC Output

↓

Industrial AC Motor

↓

Mechanical Load

The drive serves as the electrical interface between the industrial power supply and the motor. Instead of operating the motor only at the fixed frequency of the incoming supply, the drive provides controlled motor operation according to the configured speed, torque, acceleration, and process requirements.

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How the Drive Works

The basic power-conversion process can be simplified into three major stages:

1. AC Input

The drive receives three-phase AC power at the specified input voltage.

2. DC Bus

The incoming AC is converted into an internal DC-link voltage.

3. Inverter Output

The inverter stage switches the DC energy to produce a controlled three-phase output for the motor.

This allows the drive to regulate motor operation according to application requirements.

The PowerFlex 753 can therefore be integrated into a broader automation architecture where the PLC, HMI, sensors, and drive work together.

---

456 A Output Rating

The exact 20F1ANC456JN0NNNNN configuration is rated at 456 A.

This is a substantial current rating intended for high-power motor applications.

Motor-drive selection should not be based solely on motor horsepower.

Engineers should verify:

• Motor rated current
• Motor voltage
• Motor power
• Duty cycle
• Overload requirement
• Starting torque
• Acceleration time
• Deceleration requirements
• Mechanical inertia
• Ambient temperature
• Installation altitude
• Cooling conditions

The motor’s nameplate current should be compared against the drive’s applicable rating before commissioning.

---

250 kW Normal Duty and 200 kW Heavy Duty

The drive provides two important application ratings:

250 kW Normal Duty

200 kW Heavy Duty

The distinction between normal-duty and heavy-duty operation is important when selecting a drive for a particular machine.

A motor application with significant overload demand, high starting torque, frequent acceleration, or demanding mechanical loading may need to be evaluated according to the heavy-duty rating.

The final selection should therefore consider both:

Motor Power

and

Motor Current / Load Profile

rather than relying on the kW value alone.

---

Frame 7 Construction

The 20F1ANC456JN0NNNNN uses a Frame 7 design.

The supplied physical dimensions are:

881.5 × 349.6 × 430 mm

and the supplied weight is:

48 kg.

Technical data lists the physical dimensions as approximately:

• Height: 881.5 mm
• Width: 430 mm
• Depth: 349.6 mm
• Weight: 48 kg

This is a large industrial drive, so cabinet layout and handling should be planned before installation.

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Industrial Applications

Conveyor Systems

The PowerFlex 753 can be applied to high-power conveyor systems where controlled acceleration and adjustable motor speed are required.

Typical applications include:

• Bulk material conveyors
• Mining conveyors
• Production conveyors
• Transfer systems
• Heavy-duty material handling
• Processing conveyors

---

Pumps

Large industrial pumps can use variable-speed control to match motor operation to changing process requirements.

Potential applications include:

• Process pumps
• Cooling-water pumps
• Circulation pumps
• Industrial water systems
• Fluid-transfer systems

---

Fans and Blowers

Large fans and blowers often require variable-speed operation.

The drive can adjust motor speed according to the required airflow or process condition.

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Material Handling

High-power motor control is commonly required in:

• Heavy conveyors
• Transfer machinery
• Processing systems
• Large lifting equipment
• Industrial transport systems

The drive can provide controlled motor acceleration and operating speed.

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Manufacturing Equipment

The PowerFlex 753 can be integrated into production equipment where motor speed must be coordinated with a PLC-controlled machine sequence.

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Process Machinery

Large process machines may require continuous motor-speed regulation.

The drive can operate as the motor-control layer between the automation controller and the machine.

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Integration with Industrial Automation

A typical architecture can be arranged as:

HMI

↓

PLC

↓

Industrial Network / I/O

↓

PowerFlex 753

↓

AC Motor

↓

Mechanical Process

The PLC can manage:

• Machine sequence
• Start/stop commands
• Speed references
• Interlocks
• Process conditions
• Production logic

The PowerFlex drive handles motor-control functions such as:

• Speed regulation
• Acceleration
• Deceleration
• Motor protection
• Drive diagnostics
• Motor operating status

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Installation Guide

1. Verify the Exact Catalog Number

Before installation, confirm:

20F1ANC456JN0NNNNN

Do not replace it with another PowerFlex 753 configuration solely because the replacement has the same frame size.

Check:

• Voltage
• Current
• Power rating
• Duty rating
• Braking configuration
• Filtering
• Cooling
• I/O
• HIM configuration

---

2. Inspect the Drive

Before mounting, inspect the drive for:

• Physical damage
• Damaged terminals
• Cracks
• Corrosion
• Moisture
• Contamination
• Loose hardware
• Signs of overheating

The drive should be inspected before it is connected to the electrical system.

---

3. Confirm Cabinet Dimensions

The supplied dimensions are:

881.5 × 349.6 × 430 mm

Cabinet planning should include additional space for:

• Power wiring
• Motor wiring
• Control wiring
• Communication
• Grounding
• Cooling
• Maintenance
• Component removal

Do not install the drive in a space that only matches the physical dimensions of the enclosure.

---

4. Consider the 48 kg Weight

The supplied product weight is:

48 kg

The mounting structure must be strong enough to support the drive.

During installation, suitable lifting and handling procedures should be used.

Do not use electrical cables to support or position the drive.

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5. Prepare the Cooling System

The exact configuration uses forced-air cooling.

Cooling is therefore a critical installation consideration.

Check:

• Cabinet ventilation
• Fan operation
• Airflow
• Ambient temperature
• Air passages
• Dust accumulation
• Nearby heat sources

High-power drives can generate substantial heat, so the cabinet thermal design should consider the total heat generated by all installed equipment.

---

6. Verify Grounding

Connect protective grounding according to the approved electrical design.

Grounding is important for:

• Personnel safety
• Equipment protection
• Electrical noise management
• Stable drive operation

Inspect the ground connection before energization.

---

7. Verify Incoming Power

The exact model is configured for:

400 VAC, Three Phase.

Before energization, verify:

• Supply voltage
• Phase configuration
• Frequency
• Disconnect
• Protective devices
• Power cables
• Grounding
• Terminal connections

---

8. Connect the Motor

Connect the motor according to the approved electrical drawing.

Verify:

• Motor phases
• Motor grounding
• Cable insulation
• Terminal connections
• Cable routing
• Motor condition

Incorrect motor connections can result in abnormal current, incorrect rotation, protective trips, or motor damage.

---

9. Connect Control Wiring

Depending on the automation design, control connections can include:

• Start
• Stop
• Enable
• Digital inputs
• Digital outputs
• Analog signals
• Interlocks
• PLC signals
• Fault feedback

All control wiring should be verified against the machine electrical documentation.

---

10. Connect Communication

If the drive is connected to a PLC or industrial network, verify:

• Network wiring
• Communication hardware
• Device addressing
• Configuration
• PLC setup
• Data mapping
• Status feedback
• Fault information

---

11. Separate Power and Control Wiring

Where possible, separate high-power motor and input cables from low-level control and communication wiring.

This can help reduce electrical interference and improve signal reliability.

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Pre-Commissioning Checklist

Inspection Item	Required Check
Catalog Number	20F1ANC456JN0NNNNN
Input Voltage	400 VAC
Input Phase	3 Phase
Output Current	456 A
Normal Duty	250 kW
Heavy Duty	200 kW
Frame	7
Cooling	Forced Air
Dimensions	881.5 × 349.6 × 430 mm
Weight	48 kg
Grounding	Verified
Power Wiring	Verified
Motor Wiring	Verified
Control Wiring	Verified
Communication	Verified
Cabinet Cooling	Verified
Protective Equipment	Verified

---

Commissioning Procedure

Step 1 — Perform Final Inspection

Check all:

• Power connections
• Motor connections
• Grounding
• Control wiring
• Communication
• Cabinet cooling
• Mechanical mounting

Remove tools and foreign materials from the enclosure.

---

Step 2 — Record Motor Nameplate Information

Record:

• Rated voltage
• Rated current
• Frequency
• Motor power
• Rated speed
• Connection type

---

Step 3 — Configure Motor Data

Enter the correct motor information into the drive.

Incorrect motor data can cause:

• High current
• Poor acceleration
• Motor heating
• Unstable operation
• Protective trips

---

Step 4 — Configure the Command Source

Determine whether the drive receives commands from:

• PLC
• Hardwired I/O
• Communication network
• Local control
• Machine controller

---

Step 5 — Configure Speed Reference

Verify:

• Reference source
• Scaling
• Minimum speed
• Maximum speed
• PLC mapping
• Network mapping

---

Step 6 — Configure Acceleration

Set acceleration according to the motor and mechanical load.

An acceleration time that is too short may produce excessive current.

---

Step 7 — Configure Deceleration

Set deceleration according to:

• Load inertia
• Stopping requirements
• Process requirements
• Regenerative energy

This is especially important for high-inertia equipment.

---

Step 8 — Perform a Controlled Start

Start the motor under controlled conditions.

Observe:

• Rotation
• Current
• Speed
• Vibration
• Noise
• Drive status

---

Step 9 — Increase Speed Gradually

Increase speed while monitoring drive and motor behavior.

---

Step 10 — Apply Mechanical Load

Introduce the process load gradually.

Monitor:

• Motor current
• Motor temperature
• Drive status
• Vibration
• Process response

---

Step 11 — Test PLC Operation

Verify:

• Start
• Stop
• Speed reference
• Drive status
• Fault feedback
• Communication
• Interlocks

---

Step 12 — Back Up the Final Configuration

After successful commissioning, save the validated drive parameters.

A current backup can significantly reduce downtime during future maintenance or drive replacement.

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Troubleshooting Guide

Drive Does Not Power Up

Possible causes include:

• No incoming power
• Open disconnect
• Protective device trip
• Incorrect wiring
• Power-system problem
• Internal drive fault

Check the system in this order:

Power Source → Protection → Disconnect → Wiring → Drive

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Motor Does Not Start

Check:

• Start command
• Command source
• Enable signal
• Active fault
• Interlock
• Speed reference
• Motor wiring

If the drive is powered but the motor does not start, determine whether the drive is actually receiving the required command.

---

Overcurrent During Acceleration

Possible causes:

• Acceleration time too short
• Excessive mechanical load
• High inertia
• Mechanical obstruction
• Incorrect motor parameters
• Motor fault

Compare current during no-load and loaded operation.

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Overcurrent During Normal Operation

Possible causes:

• Excessive process load
• Mechanical friction
• Motor problem
• Incorrect motor parameters
• Mechanical obstruction

Inspect both the electrical and mechanical systems.

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Overvoltage During Deceleration

Possible causes include:

• Excessive regenerative energy
• Deceleration time too short
• High-inertia load
• Braking-system limitations

The exact 20F1ANC456JN0NNNNN configuration is listed with no dynamic-braking transistor.

Therefore, applications with large inertia or frequent rapid stopping should be evaluated carefully during system design.

---

Drive Overheating

Possible causes:

• Poor ventilation
• Blocked airflow
• Cooling fan failure
• High ambient temperature
• Dust
• Continuous overload
• Cabinet heat accumulation

Check the entire enclosure rather than inspecting the drive alone.

---

Motor Runs Below the Expected Speed

Check:

• Speed reference
• Reference scaling
• Maximum speed setting
• Motor parameters
• PLC output
• Communication data
• Control source

Compare the commanded reference with the actual reference received by the drive.

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Motor Speed Fluctuates

Possible causes:

• Unstable reference signal
• Communication problem
• Incorrect configuration
• Variable mechanical load
• Feedback-related problem

Trace the complete signal path:

Command → Drive → Motor → Mechanical Load

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Excessive Motor Vibration

Possible causes include:

• Motor imbalance
• Bearing wear
• Coupling problem
• Misalignment
• Mechanical resonance
• Installation problems

A vibration problem should not automatically be attributed to the AC drive.

---

Communication Failure

Check:

• Communication cable
• Connectors
• Device address
• PLC configuration
• Network configuration
• Network hardware
• Electrical interference

Start with physical connections before investigating software configuration.

---

PLC Cannot Control the Drive

Check:

• Command source
• PLC logic
• Communication configuration
• Enable status
• Interlocks
• Speed reference

If local operation works but PLC operation does not, the problem is likely within the control architecture or communication configuration.

---

Drive Trips When Mechanical Load Is Applied

Possible causes:

• Excessive load
• Motor overload
• Mechanical obstruction
• Insufficient acceleration time
• Incorrect motor data
• Mechanical transmission problem

Compare motor current before and after the load is introduced.

---

Drive Trips After Long Operation

Possible causes:

• Thermal accumulation
• Insufficient cooling
• Cooling fan degradation
• Continuous overload
• High ambient temperature
• Motor overheating

Record temperature, current, load, and cooling conditions before the trip.

---

Preventive Maintenance

Cooling Inspection

Because the drive uses forced-air cooling, cooling-system maintenance is important.

Inspect:

• Cooling fans
• Air passages
• Cabinet ventilation
• Dust
• Ambient temperature
• Airflow

A gradual increase in operating temperature can indicate a developing cooling problem.

---

Electrical Inspection

Periodically inspect:

• Input terminals
• Motor terminals
• Grounding
• Control wiring
• Communication wiring

Look for:

• Loose connections
• Discoloration
• Heat damage
• Insulation deterioration
• Mechanical damage

---

Motor Inspection

Monitor:

• Motor current
• Motor temperature
• Vibration
• Noise
• Bearings
• Mechanical loading

A change in motor current can provide an early indication of a developing mechanical or electrical problem.

---

Drive Replacement Procedure

1. Save the Existing Configuration

Back up the existing parameters before removing the drive whenever possible.

Record application-specific settings and motor information.

---

2. Document All Connections

Identify:

• Incoming power
• Motor connections
• Ground
• Control wiring
• Communication
• Feedback
• Auxiliary connections

---

3. Stop the Machine Safely

Bring the machine to a safe operating state.

Follow the site’s approved electrical isolation and machine-safety procedures.

---

4. Isolate Electrical Power

Disconnect the incoming supply using the approved isolation procedure.

Allow the required discharge period and verify the safe electrical condition before accessing the drive.

---

5. Remove the Existing Drive

Disconnect the wiring and remove the drive from its mounting structure.

The 48 kg unit should be handled with suitable mechanical assistance when required.

---

6. Inspect the Installation

Before installing the replacement, inspect:

• Cabinet
• Mounting hardware
• Power cables
• Motor cables
• Grounding
• Cooling
• Adjacent equipment

---

7. Install the Replacement

Secure the replacement drive properly.

Verify that the mounting arrangement can support the Frame 7 drive.

---

8. Reconnect Wiring

Reconnect:

• Input power
• Motor
• Ground
• Control
• Communication
• Feedback where applicable

---

9. Restore the Configuration

Load the validated configuration.

---

10. Verify Motor Parameters

Confirm that the configured motor information matches the actual motor.

---

11. Perform Controlled Testing

Test:

• Start
• Stop
• Direction
• Speed
• Current
• Drive status
• Vibration
• Noise

---

12. Test PLC Integration

Verify:

• Start command
• Stop command
• Speed command
• Status feedback
• Fault feedback
• Communication
• Interlocks

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Compatible System Components

Component	Function
PLC	Machine control and sequencing
HMI	Operator control and monitoring
I/O Modules	Hardwired control and feedback
Communication Interface	Network integration
AC Motor	Mechanical power source
Sensors	Process feedback
Circuit Protection	Electrical protection
Disconnect	Power isolation
Control Cabinet	Equipment mounting and protection
Braking Equipment	Application-specific stopping control

The final component selection depends on the complete machine design and control architecture.

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Recommended Related PowerFlex 753 Models

Model	Product Type	Typical Selection Consideration
20F1ANC260JN0NNNNN	PowerFlex 753 AC Drive	Lower current/power application
20F1ANC302JN0NNNNN	PowerFlex 753 AC Drive	High-power motor application
20F1ANC367JN0NNNNN	PowerFlex 753 AC Drive	367 A / 200 kW-class configuration
20F1ANC456JN0NNNNN	PowerFlex 753 AC Drive	456 A / 250 kW ND configuration
Other PowerFlex 753 Models	PowerFlex 753 AC Drive	Select according to voltage, current, duty and configuration

When selecting a replacement, compare the complete catalog configuration instead of using frame size alone.

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Key Advantages

• Allen Bradley PowerFlex 753 platform
• High-power AC motor control
• 456 A output-current class
• 250 kW normal-duty rating
• 200 kW heavy-duty rating
• 400 VAC three-phase input
• Frame 7 construction
• Forced-air cooling
• Embedded I/O
• AC input with precharge
• No DC terminals
• Filtered input configuration
• CM jumper installed
• No dynamic-braking transistor
• No HIM
• IP20/IP00 open-type enclosure
• Suitable for PLC-based industrial automation
• Suitable for large conveyors
• Suitable for pumps and fans
• Suitable for material-handling systems
• Suitable for large process machinery
• 48 kg supplied weight
• 881.5 × 349.6 × 430 mm supplied dimensions

The exact electrical configuration is documented as 456 A, 250 kW normal duty, 200 kW heavy duty, 400 VAC three-phase, Frame 7, forced air, embedded I/O, filtered, and without an internal dynamic-braking transistor.

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Technical FAQs

What is Allen Bradley 20F1ANC456JN0NNNNN?

It is a PowerFlex 753 AC Drive designed for high-power three-phase industrial motor control.

What is the rated output current?

The exact catalog configuration is rated at 456 A.

What is the normal-duty power rating?

The normal-duty rating is 250 kW.

What is the heavy-duty rating?

The heavy-duty rating is 200 kW.

What input voltage does it use?

The drive is configured for 400 VAC, three-phase input.

What is the frame size?

It is a Frame 7 PowerFlex 753 drive.

What are the dimensions?

The supplied dimensions are:

881.5 × 349.6 × 430 mm

Technical data lists the same physical dimensions with height 881.5 mm, width 430 mm, and depth 349.6 mm.

What is the weight?

The supplied weight is 48 kg, consistent with published technical data for this configuration.

Does it have embedded I/O?

Yes. The exact catalog configuration includes embedded I/O.

Does it use forced-air cooling?

Yes. The catalog description identifies it as a forced-air PowerFlex 753 AC drive.

Does the model have a dynamic-braking transistor?

No. The 20F1ANC456JN0NNNNN configuration is specified with no dynamic-braking transistor.

Does it include a HIM?

No. The catalog configuration is listed as Blank / No HIM.

Does it have DC terminals?

No. It uses AC input with precharge and no DC terminals.

Why is the lack of a dynamic-braking transistor important?

Applications with high-inertia loads or frequent rapid deceleration can generate regenerative energy. Since this configuration does not include an internal dynamic-braking transistor, the braking strategy needs to be considered during application design.

Why does the drive trip during acceleration?

Possible causes include excessive acceleration demand, high mechanical inertia, excessive load, incorrect motor parameters, mechanical obstruction, or motor problems.

Why does it trip during deceleration?

Possible causes include excessive regenerative energy, a short deceleration time, or a high-inertia load.

Why does the drive overheat?

Check cooling fans, cabinet ventilation, airflow, ambient temperature, dust accumulation, and continuous motor loading.

Can it be integrated with a PLC?

Yes. The PowerFlex 753 platform is intended for integration with industrial automation systems using appropriate I/O and communication configurations.

What should be checked before replacing this drive?

Verify:

• Exact catalog number
• Input voltage
• Phase
• Current
• Normal-duty rating
• Heavy-duty rating
• Frame size
• Cooling
• Braking configuration
• Filtering
• Embedded I/O
• HIM configuration
• Enclosure
• Communication requirements

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Conclusion

The Allen Bradley 20F1ANC456JN0NNNNN PowerFlex 753 AC Drive is a high-capacity variable frequency drive for large industrial AC motor applications. Its exact configuration provides 456 A output current, 250 kW normal-duty capacity, 200 kW heavy-duty capacity, 400 VAC three-phase input, Frame 7 construction, forced-air cooling, embedded I/O, filtered input, AC input with precharge, and no internal dynamic-braking transistor.

The physical dimensions supplied for this model are 881.5 × 349.6 × 430 mm, and the supplied weight is 48 kg. Technical documentation likewise lists approximately 881.5 mm height, 430 mm width, 349.6 mm depth, and 48 kg weight.

For installation, special attention should be given to cabinet space, forced-air cooling, grounding, power wiring, motor wiring, and the handling requirements associated with a large Frame 7 drive.

During commissioning, motor nameplate data, command sources, speed references, acceleration, deceleration, PLC communication, and machine interlocks should be verified systematically.

For troubleshooting, a drive fault should be investigated as part of the complete system. Incoming power, drive configuration, PLC commands, communication, motor condition, cooling, and mechanical loading can all contribute to abnormal operation.

Because this particular catalog configuration has no internal dynamic-braking transistor, applications involving high-inertia loads and frequent deceleration require particular attention to regenerative-energy management.

With proper installation, configuration, cooling, preventive maintenance, and systematic troubleshooting, the 20F1ANC456JN0NNNNN PowerFlex 753 provides a high-power motor-control solution for demanding industrial automation and process applications.