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Allen-Bradley 20G1AJE355AN0NNNNN PowerFlex 755 AC Drive

1. Product Overview

The Allen-Bradley 20G1AJE355AN0NNNNN is a high-power PowerFlex 755 AC drive designed for large industrial motor-control applications.

It is a 600 VAC, three-phase, 355 A, Frame 8 air-cooled packaged drive intended for large motors and heavy industrial machinery where adjustable speed, controlled acceleration, process regulation, overload capability, and networked automation are required.

The drive provides three principal duty classifications:

• 400 HP Light Duty
• 350 HP Normal Duty
• 300 HP Heavy Duty

This makes the 20G1AJE355AN0NNNNN suitable for a broad range of high-power industrial applications, including large pumps, fans, blowers, conveyors, water-treatment equipment, mining machinery, cement equipment, material-handling systems, and process-production machinery.

The model uses an IP54 / NEMA Type 12, 800 mm deep MCC-style package and is designed around a large Frame 8 mechanical and electrical architecture.

The drive includes embedded EtherNet/IP, allowing it to participate in a PLC-based automation system without requiring a separate basic network interface for standard Ethernet communication.

The specified configuration also includes an EMC filter, AC input with precharge, no DC terminals, CM jumper removed, no internal dynamic braking, and a blank/no-HIM configuration.

The no-HIM arrangement is particularly useful when the drive is intended to be operated and monitored through a centralized PLC, HMI, SCADA, or engineering system rather than through a permanent local keypad.

The original catalog number is now a discontinued configuration, with 20G1AJE355JN0NNNNN identified as the direct replacement configuration. For installed equipment, however, the original catalog number remains important for identification, maintenance, spare-parts management, and retrofit documentation.

2. Brand and Series

Item	Specification
Brand	Allen-Bradley
Series	PowerFlex 755
Product Family	PowerFlex 755 AC Drive
Product Type	High-Power AC Variable Frequency Drive
Catalog Number	20G1AJE355AN0NNNNN
Configuration	AN0
Voltage Class	600 VAC
Input Phase	Three Phase
Frame Size	Frame 8
Cooling	Air Cooled / Forced Air
Enclosure	IP54 / NEMA Type 12
Cabinet Style	800 mm Deep MCC Style
Communication	Embedded EtherNet/IP
Local HIM	Blank / No HIM
Input Configuration	AC Input with Precharge
DC Terminals	None
EMC Filter	Yes
CM Jumper	Removed
Dynamic Braking	None

3. Main Product Specifications

Parameter	Specification
Model	20G1AJE355AN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Drive Type	Air-Cooled AC Drive
Input Voltage	600 VAC
Input Phase	3 Phase
Normal-Duty Output Current	355 A
Light-Duty Output Current	395 A
Heavy-Duty Output Current	295 A
Light-Duty Horsepower	400 HP
Normal-Duty Horsepower	350 HP
Heavy-Duty Horsepower	300 HP
Light-Duty 1-Minute Current	435 A
Normal-Duty 1-Minute Current	391 A
Normal-Duty 3-Second Current	533 A
Heavy-Duty 1-Minute Current	443 A
Heavy-Duty 3-Second Current	533 A
Frame	Frame 8
Enclosure	IP54
NEMA Rating	Type 12
Cabinet Style	800 mm Deep MCC Style
Cooling	Forced Air
Communication	Embedded EtherNet/IP
HIM	Blank / No HIM
Input	AC Input with Precharge
DC Terminals	No
EMC Filter	Yes
CM Jumper	Removed
Dynamic Braking	None
Approximate Height	Approx. 2100–2500 mm
Approximate Width	Approx. 600 mm
Approximate Depth	Approx. 800 mm
Approximate Weight	Approx. 600–650 kg
Installation	MCC / Floor-Standing Industrial Installation
Main Application	Large Industrial Motor Control

4. Electrical Ratings

The electrical rating is one of the most important characteristics of the 20G1AJE355AN0NNNNN.

The model is designed for a 600 VAC three-phase power system and provides a normal-duty continuous output current of 355 A.

The three duty classifications allow the same basic drive platform to be considered for different types of mechanical loads.

Duty Classification	Continuous Current	1-Minute Current	3-Second Current	Horsepower
Light Duty	395 A	435 A	N/A	400 HP
Normal Duty	355 A	391 A	533 A	350 HP
Heavy Duty	295 A	443 A	533 A	300 HP

The 350 HP Normal-Duty rating is a useful general reference for the model.

For centrifugal loads such as large pumps and fans, the Light-Duty rating can provide a higher available horsepower capability.

For high-torque applications, the Heavy-Duty rating should be considered based on the actual motor current and mechanical load.

5. Light-Duty Rating

The Light-Duty configuration provides approximately 395 A continuous output and a 400 HP rating.

This rating is particularly useful for loads where the torque requirement follows a relatively favorable speed relationship.

Typical examples include:

• Centrifugal pumps
• Centrifugal fans
• Large blowers
• Cooling systems
• Ventilation equipment

For these applications, the mechanical power requirement can vary substantially with speed.

A variable-frequency drive can therefore provide useful process control while allowing the motor to operate below full speed when full output is not required.

6. Normal-Duty Rating

The Normal-Duty rating is 355 A continuous and 350 HP.

This represents the primary current rating associated with the catalog number.

Normal-duty applications can include:

• General industrial pumps
• Large fans
• Conveyors with moderate load variation
• Material-handling equipment
• Process machinery
• Industrial blowers
• Large auxiliary machinery

The normal-duty rating provides a practical balance between continuous current capability and short-duration overload performance.

7. Heavy-Duty Rating

The Heavy-Duty classification provides approximately 295 A continuous current and a 300 HP rating.

Although the continuous current is lower than the Light-Duty and Normal-Duty ratings, the drive is capable of higher short-duration overload current.

This makes Heavy-Duty sizing more appropriate for applications with greater torque demand.

Examples can include:

• High-inertia conveyors
• Material feeders
• Heavy process equipment
• Certain crushers
• Heavy material-handling machinery
• High-torque starting applications

The correct selection should always be based on actual motor current and mechanical load rather than horsepower alone.

8. 600 VAC Three-Phase Architecture

The 600 VAC rating makes this drive particularly useful in industrial facilities using 575/600 V-class motor systems.

Large industrial facilities often use higher motor voltage to reduce current for high-power equipment.

This can be advantageous for:

• Large motors
• Long feeder systems
• Large process equipment
• Mining equipment
• Water infrastructure
• Heavy industrial machinery

The 600 VAC class is therefore a major distinguishing feature of the 20G1AJE355AN0NNNNN compared with many smaller drives in the PowerFlex product range.

9. PowerFlex 755 Platform

The PowerFlex 755 platform is designed for applications requiring more than basic motor speed control.

The 20G1AJE355AN0NNNNN can form part of a larger industrial automation architecture.

A typical system may contain:

• PLC
• HMI
• Industrial Ethernet
• Drive
• Motor
• Process sensors
• Pressure sensors
• Flow sensors
• Temperature sensors
• Safety equipment
• Supervisory control

The drive performs the power conversion and motor-control functions while the automation system manages production logic and process coordination.

10. Embedded EtherNet/IP

Embedded EtherNet/IP is one of the important features of the 20G1AJE355AN0NNNNN.

It allows the drive to exchange operating information with a networked industrial control system.

Typical information can include:

• Start command
• Stop command
• Speed reference
• Frequency reference
• Drive status
• Motor current
• Output frequency
• Fault status
• Alarm information
• Diagnostic information
• Parameter information
• Operating conditions

This is especially useful when several large drives are installed in the same facility.

Instead of providing separate hardwired circuits for every control function, the drive can exchange many operating commands and status values through the industrial network.

11. No-HIM Configuration

The AN0 configuration is supplied with a blank/no-HIM arrangement.

This means the drive does not rely on a permanently mounted local operator keypad for normal operation.

The configuration is well suited to installations where the drive is controlled through:

• PLC
• HMI
• SCADA
• Engineering workstation
• Industrial Ethernet
• Centralized control panel

This approach is common in large plants where multiple drives are installed in a dedicated electrical room and operators control the equipment from a centralized station.

12. AN0 Configuration

The catalog number 20G1AJE355AN0NNNNN identifies several important configuration characteristics.

The AN0 configuration indicates:

• High-power PowerFlex 755 drive
• 600 VAC class
• 355 A normal-duty class
• EMC-filtered configuration
• CM jumper removed
• No internal dynamic braking transistor
• Blank/no HIM configuration

This is important when replacing an existing drive.

A replacement should match not only the current rating but also the HIM configuration, grounding arrangement, EMC configuration, braking requirements, and mechanical package.

13. EMC Filter

The drive includes an EMC filter.

The purpose of the filter is to help manage electromagnetic interference generated by the switching operation of the inverter.

This is particularly useful in large industrial environments containing many electrical and electronic systems.

Potentially sensitive equipment can include:

• PLCs
• Analog instrumentation
• Communication systems
• Industrial Ethernet
• Sensors
• Measurement systems
• Other variable-frequency drives

The filter is only one part of the complete EMC system.

Correct motor-cable selection, grounding, shielding, cabinet bonding, and cable routing are equally important.

14. CM Jumper Removed

The CM jumper removed configuration is an important electrical characteristic of the AN0 model.

Common-mode configuration affects the relationship between the drive, motor, grounding system, and electrical distribution system.

This should be considered during:

• New installations
• Retrofit projects
• Drive replacements
• Motor replacement
• Grounding modifications

The common-mode configuration should be compatible with the overall electrical system.

It should not be changed casually simply because another PowerFlex 755 model has a different jumper configuration.

15. AC Input with Precharge

The 20G1AJE355AN0NNNNN uses AC input with precharge.

Precharge is particularly important for large drives because the DC bus contains substantial energy-storage components.

When the drive is energized, the precharge arrangement manages the initial charging process of the DC bus.

The specified configuration does not provide external DC terminals.

Therefore, system designers should use the intended AC-input architecture when designing the incoming power system.

16. Dynamic Braking Configuration

The catalog configuration specifies no internal dynamic braking transistor.

This is an important point when evaluating applications involving high-inertia loads or frequent deceleration.

If the application requires rapid stopping or substantial regenerative energy management, the complete braking strategy must be evaluated separately.

Potential considerations include:

• Mechanical brake
• Controlled deceleration
• External braking equipment
• Regenerative architecture
• Process-driven stopping
• Load inertia

The drive should not be selected for a high-inertia deceleration application without first reviewing the required stopping performance.

17. Enclosure

The 20G1AJE355AN0NNNNN uses an IP54 / NEMA Type 12 packaged enclosure.

This makes it suitable for industrial electrical environments where protection against normal dust and industrial contamination is required.

The enclosure is significantly more substantial than the compact enclosures used by small machine-level drives.

Mechanical / Environmental Parameter	Specification
Enclosure Rating	IP54
NEMA Rating	Type 12
Cabinet Style	800 mm Deep MCC Style
Frame Size	8
Cooling	Air Cooled
Installation	Industrial Electrical Room / MCC
Package	High-Power Packaged Drive
Typical Environment	Industrial

18. Dimensions and Weight

The 20G1AJE355AN0NNNNN is a large Frame 8 packaged drive.

For preliminary equipment planning, an approximate physical envelope of:

2100–2500 mm height × 600 mm width × 800 mm depth

can be used.

A planning weight of approximately:

600–650 kg

is reasonable for preliminary mechanical evaluation.

These values should be regarded as planning values rather than fabrication dimensions.

The final cabinet, foundation, transport fixture, and lifting arrangement should be designed from the applicable mechanical drawing for the exact configuration.

Mechanical Parameter	Approximate Value
Height	Approx. 2100–2500 mm
Width	Approx. 600 mm
Depth	Approx. 800 mm
Weight	Approx. 600–650 kg
Frame	Frame 8
Cabinet Depth	800 mm
Mounting Style	MCC / Floor Standing
Handling	Heavy Equipment Handling Required

The substantial weight is associated with the high-current power section, enclosure, bus structure, cooling system, EMC components, protection equipment, and associated packaged-drive hardware.

19. Cooling System

The drive uses forced-air cooling.

At this power level, thermal management is an important part of system reliability.

The installation should provide sufficient:

• Air intake
• Air exhaust
• Cabinet ventilation
• Clearance
• Cooling-air circulation
• Maintenance access

Regular maintenance should include checking:

• Cooling fans
• Air passages
• Cabinet ventilation
• Dust accumulation
• Abnormal temperature rise

A blocked or restricted cooling path can increase semiconductor temperature and reduce long-term drive reliability.

20. Main Product Applications

20.1 Large Pumping Systems

The 20G1AJE355AN0NNNNN is particularly suitable for large centrifugal pumps.

Typical applications include:

• Raw-water pumps
• Process-water pumps
• Cooling-water pumps
• High-lift pumps
• Industrial circulation pumps
• Water-transfer pumps
• Wastewater pumps
• Utility pumps

Variable-speed operation allows the pumping system to respond to changing demand.

Instead of operating the motor at full speed continuously, the drive can regulate speed according to required process flow or pressure.

20.2 Large Fans

Large fans can require hundreds of horsepower.

The drive’s 600 VAC class and high current capacity make it suitable for:

• Furnace fans
• Boiler fans
• Exhaust fans
• Ventilation fans
• Cooling fans
• Process-air fans
• Dust-collection fans
• Large HVAC systems

For centrifugal fans, variable-speed operation can provide substantial process-control flexibility.

20.3 Industrial Blowers

Large blowers are another suitable application.

Typical applications include:

• Aeration
• Combustion air
• Industrial ventilation
• Process air
• Pneumatic conveying
• Furnace air systems

The drive can regulate blower speed according to airflow or pressure requirements.

20.4 Heavy Conveyors

Large conveyors can require high starting torque and controlled acceleration.

The drive can help manage:

• Starting current
• Acceleration
• Deceleration
• Belt stress
• Mechanical shock
• Conveyor synchronization

Applications include:

• Mining conveyors
• Cement conveyors
• Aggregate conveyors
• Bulk-material conveyors
• Port handling
• Industrial material handling

20.5 Mining

Mining operations frequently use large motors in demanding environments.

Potential applications include:

• Conveyors
• Dewatering pumps
• Ventilation fans
• Material-handling equipment
• Processing machinery
• Auxiliary systems

For severe high-torque mining loads, the Heavy-Duty rating should be evaluated carefully against the actual motor current and load profile.

20.6 Cement and Aggregate

Cement and aggregate facilities contain many high-power motor loads.

The drive can be used for:

• Process fans
• Conveyors
• Feeders
• Pumps
• Blowers
• Material-handling systems
• Dust-control systems

The network interface also allows the drive to participate in a centralized production-control system.

20.7 Water and Wastewater

Large water infrastructure frequently requires variable-speed control.

Applications can include:

• Intake pumps
• Distribution pumps
• High-lift pumps
• Wastewater pumps
• Aeration equipment
• Sludge systems
• Industrial wastewater systems

The embedded communication interface can be useful when the drive must be monitored by a centralized control system.

20.8 Material Handling

The drive is suitable for large material-handling systems where acceleration and deceleration must be controlled.

Potential equipment includes:

• Belt conveyors
• Feed conveyors
• Transfer systems
• Large feeders
• Bulk-material equipment
• Production conveyors

20.9 Process Manufacturing

Large process facilities frequently use variable-speed motors for:

• Pumps
• Fans
• Blowers
• Feeders
• Mixers
• Conveyors
• Cooling equipment
• Material-handling equipment

The drive can provide both motor-speed control and networked status information.

21. Product Advantages

21.1 High Current Capacity

The 355 A normal-duty rating gives the drive substantial motor-control capability.

It is suitable for applications where smaller variable-frequency drives cannot provide sufficient current.

This makes it particularly useful for large industrial motors.

21.2 600 VAC Operation

The 600 VAC class makes the drive suitable for higher-voltage industrial motor systems.

This is an important advantage for facilities using 575/600 V-class motor distribution.

21.3 Multiple Duty Ratings

The three duty classifications provide application flexibility.

The same basic drive can be considered for:

• 400 HP Light Duty
• 350 HP Normal Duty
• 300 HP Heavy Duty

The final rating should always be based on the actual motor and mechanical load.

21.4 Embedded EtherNet/IP

Network integration is one of the most useful features for automated facilities.

The drive can communicate operating and diagnostic information to the control system, reducing the need for extensive point-to-point wiring.

21.5 Industrial Enclosure

The IP54 / NEMA Type 12 enclosure provides a rugged packaged solution for industrial electrical rooms.

It eliminates the need to treat the drive as a bare open-frame electronic assembly.

21.6 EMC Filtering

The EMC filter helps reduce conducted electromagnetic interference.

This is useful in large plants where multiple electronic systems share the same electrical environment.

21.7 Air-Cooled Architecture

Forced-air cooling is a familiar technology for industrial maintenance personnel.

A properly maintained fan and airflow system provides a practical thermal-management method for a high-power drive.

21.8 MCC-Style Construction

The 800 mm deep MCC-style architecture is well suited to centralized motor-control installations.

Multiple high-power motor-control sections can be organized into a structured electrical system.

21.9 No-HIM Configuration

The blank/no-HIM arrangement is useful where the drive is controlled from a centralized automation system.

This can reduce unnecessary local operator hardware when local keypad operation is not required.

21.10 High-Power Industrial Platform

The PowerFlex 755 architecture provides a suitable foundation for applications that require more sophisticated motor control than a basic general-purpose inverter.

It can be integrated into larger automation, diagnostic, and production-control systems.

22. Five Recommended Same-Series or Related Models

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

Model	Voltage	Current Class	Light Duty	Normal Duty	Heavy Duty	Main Difference
20G1AJE295AN0NNNNN	600 VAC	295 A ND	350 HP	300 HP	250 HP	Lower-current Frame 8
20G1AJE355AN0NNNNN	600 VAC	355 A ND	400 HP	350 HP	300 HP	Reference model
20G1AJE395AN0NNNNN	600 VAC	395 A ND	450 HP	400 HP	350 HP	Higher-current option
20G1AJE435AN0NNNNN	600 VAC	435 A ND	500 HP	450 HP	350 HP	Higher-power option
20G1AJE460AN0NNNNN	600 VAC	460 A ND	500 HP	500 HP	400 HP	Higher-current Frame 8

These models provide a practical progression when selecting a high-power 600 VAC drive.

The 295 A model is appropriate when the motor current falls within its range.

The 395 A, 435 A, and 460 A models provide progressively greater current capacity for larger motors or more demanding load conditions.

23. Additional Related Configurations

The same electrical family is available with different HIM and CM-jumper configurations.

Model	Current	Voltage	HIM	CM Jumper	General Configuration
20G1AJE355AN0NNNNN	355 A ND	600 VAC	No HIM	Removed	Reference AN0 configuration
20G1AJE355AN4NNNNN	355 A ND	600 VAC	Enhanced LCD HIM	Removed	Local-HIM version
20G1AJE355JN0NNNNN	355 A ND	600 VAC	No HIM	Installed	Replacement configuration
20G1AJE355JN4NNNNN	355 A ND	600 VAC	Enhanced LCD HIM	Installed	Local-HIM replacement configuration

This distinction is important for replacement projects.

A drive with the same current and horsepower rating may still have a different installation requirement because of the HIM or common-mode configuration.

24. Five Popular Allen-Bradley Models for Comparison

The following models provide useful reference points across different PowerFlex applications and power ranges.

Model	Series	Voltage Class	Current Class	Approximate Power Class	Typical Application
25B-D030N114	PowerFlex 525	480 VAC class	30 A class	Approx. 15 HP class	General machine control
25C-D030N114	PowerFlex 527	480 VAC class	30 A class	Approx. 15 HP class	Networked machine control
20G1AGC260JN0NNNNN	PowerFlex 755	480 VAC class	260 A	Large motor	Pumps, fans, conveyors
20G1AGC302JA0NNNNN	PowerFlex 755	480 VAC class	302 A class	Large motor	Heavy industrial equipment
20G1AGE053JA0NNNNN	PowerFlex 755	600 VAC class	High-current class	Large motor	High-power industrial applications

These models are not direct electrical substitutes for the 20G1AJE355AN0NNNNN.

They represent different voltage classes, current levels, mechanical packages, and application ranges.

25. Application Selection Table

Application	Suitability	Important Selection Point
Large centrifugal pump	Excellent	Light-Duty current and HP
Large cooling-water pump	Excellent	Continuous motor current
Industrial process pump	Excellent	Required speed range
Large fan	Excellent	Light-Duty rating
Large blower	Excellent	Torque curve
Conveyor	Excellent	Acceleration torque
Mining conveyor	Excellent	Heavy-Duty sizing
Cement conveyor	Excellent	Starting load
Water-treatment pump	Excellent	Process flow requirements
Wastewater pump	Excellent	Starting and overload requirements
Material-handling system	Excellent	Inertia and acceleration
Compressor	Good	Compressor load profile
Crusher	Good	Heavy-Duty sizing
Small machine motor	Poor	Smaller drive normally preferred

26. Mechanical Installation

The physical size of the 20G1AJE355AN0NNNNN should be considered early in the project.

This is a large Frame 8 drive and should be treated as substantial electrical equipment.

The installation should provide adequate room for:

• Incoming power connections
• Motor output connections
• Control wiring
• Network cabling
• Airflow
• Cooling
• Maintenance
• Inspection
• Component replacement

The approximate 600–650 kg weight also requires suitable lifting and transportation provisions.

27. Electrical Installation

Before installation, the following should be checked:

• Supply voltage
• Supply phase
• Available fault current
• Protective-device coordination
• Grounding system
• Motor voltage
• Motor full-load current
• Motor horsepower
• Motor insulation
• Motor cable
• Cable length
• Control architecture
• Network architecture

The drive should be selected according to actual motor current rather than relying only on horsepower.

This is especially important for applications with high starting torque or severe load variation.

28. Motor Cable Requirements

High-power variable-frequency drives produce high-frequency switching components.

Motor-cable design should therefore consider:

• Cable insulation
• Ampacity
• Shielding
• Grounding
• Cable length
• Routing
• Motor-frame bonding
• Separation from instrumentation
• Separation from network cables

Long motor cables may require additional evaluation because cable capacitance and reflected-wave effects can become increasingly significant.

29. Grounding

Grounding is critical for a high-power drive.

The installation should provide an effective protective-earth path between:

• Drive enclosure
• Motor
• Electrical cabinet
• Motor cable
• Cable shield
• Plant grounding system

The AN0 configuration has the CM jumper removed, so the common-mode configuration should be considered as part of the overall grounding design.

A poor grounding arrangement can contribute to:

• Electrical noise
• Communication problems
• Nuisance faults
• Bearing currents
• EMC problems
• Measurement instability

30. Network Integration

The embedded EtherNet/IP interface allows the drive to become part of a larger industrial communication system.

A typical architecture can be structured as:

PLC → Industrial Ethernet → PowerFlex 755 → Large AC Motor

Additional devices can include:

HMI → PLC → Drive

and:

Sensors → PLC → Drive

This architecture allows the process controller to determine motor speed while the drive performs the actual power conversion and motor-control function.

31. Local Versus Centralized Operation

Because this model is configured without a HIM, it is particularly suitable for centralized control.

A typical installation may place the drive inside an electrical room while the operator interface is located in a control room.

The PLC can provide:

• Start
• Stop
• Speed reference
• Operating mode
• Fault reset
• Status monitoring

The drive can return:

• Running status
• Actual speed
• Motor current
• Fault code
• Alarm information
• Operating status

32. Maintenance

Routine maintenance should include inspection of:

Maintenance Item	Inspection Focus
Cooling Fans	Noise, airflow, bearing condition
Air Passages	Dust and obstruction
Electrical Terminals	Tightness and heat damage
Grounding	Continuity and mechanical integrity
Motor Cable	Insulation and termination
Network Cable	Communication quality
Enclosure	Dust, moisture and damage
Internal Components	Signs of overheating
Fault History	Repeated faults
Operating Temperature	Abnormal temperature rise
Cabinet Ventilation	Airflow
EMC Connections	Shielding and bonding

Preventive maintenance is especially important for large drives because cooling or connection problems can develop gradually before causing a major trip.

33. Advantages for Industrial Automation

The 20G1AJE355AN0NNNNN is valuable in automated plants because it combines three important functions:

Power conversion

It provides the electrical power conversion necessary to control a large AC motor.

Motor control

It regulates motor speed and provides controlled acceleration and deceleration.

Industrial communication

It communicates operating and diagnostic information to the automation system.

This combination allows the drive to function as an integrated part of the production system rather than as an isolated motor controller.

34. Advantages for Pump Applications

For pump applications, the drive can provide:

• Adjustable flow
• Adjustable pressure
• Controlled acceleration
• Controlled stopping
• Reduced mechanical shock
• Process synchronization
• Network monitoring

This is particularly useful when pump demand changes during normal operation.

35. Advantages for Conveyor Applications

For conveyors, the major benefits include:

• Controlled starting
• Controlled acceleration
• Adjustable speed
• Reduced mechanical stress
• Reduced belt shock
• Better process coordination
• Centralized control

The Heavy-Duty rating should be evaluated carefully when the conveyor has substantial starting inertia or frequent overload conditions.

36. Advantages for Fan Applications

For fans and blowers, the drive can regulate speed according to process requirements.

Typical control variables include:

• Pressure
• Temperature
• Airflow
• Production rate
• Ventilation demand

This allows the motor to operate at an appropriate speed rather than running continuously at maximum speed.

37. Advantages for Water Treatment

Large water-treatment systems can use several high-power drives.

A networked drive architecture can provide a central control system with information from multiple pumps and motors.

This can simplify:

• Monitoring
• Alarm management
• Process control
• Maintenance
• Production reporting

38. Replacement Considerations

The original 20G1AJE355AN0NNNNN is discontinued.

The identified direct replacement is:

20G1AJE355JN0NNNNN

However, a replacement should not be selected based only on the 355 A rating.

The following items should be checked:

1. Input voltage.
2. Motor voltage.
3. Motor full-load current.
4. Motor horsepower.
5. Duty rating.
6. Enclosure.
7. Frame size.
8. HIM requirements.
9. Common-mode jumper configuration.
10. EMC requirements.
11. Dynamic-braking requirements.
12. Motor-cable configuration.
13. Cabinet dimensions.
14. Cooling arrangement.
15. Network architecture.
16. Control-system compatibility.

39. AN0 Versus JN0

The original AN0 and replacement JN0 configurations have the same general current and horsepower class but differ in the common-mode jumper configuration.

Feature	AN0	JN0
Voltage Class	600 VAC	600 VAC
Normal-Duty Current	355 A	355 A
Light-Duty Rating	400 HP	400 HP
Normal-Duty Rating	350 HP	350 HP
Heavy-Duty Rating	300 HP	300 HP
HIM	No HIM	No HIM
EMC Filter	Yes	Yes
CM Jumper	Removed	Installed
Dynamic Braking	None	None
EtherNet/IP	Embedded	Embedded
Enclosure	IP54 / NEMA Type 12	IP54 / NEMA Type 12
Frame	8	8

The difference is therefore primarily configuration-related rather than a change in basic motor-power capacity.

40. AN0 Versus AN4

The AN0 and AN4 versions have the same basic electrical family but differ in local operator-interface configuration.

Feature	AN0	AN4
Current Class	355 A	355 A
Voltage	600 VAC	600 VAC
Light Duty	400 HP	400 HP
Normal Duty	350 HP	350 HP
Heavy Duty	300 HP	300 HP
HIM	No HIM	Enhanced LCD Full Numeric HIM
CM Jumper	Removed	Removed
EMC Filter	Yes	Yes
Frame	8	8
Enclosure	IP54 / NEMA Type 12	IP54 / NEMA Type 12

The AN4 version is generally more attractive when local commissioning and maintenance access are important.

41. Engineering Selection Advice

When selecting this drive for a real installation, the following order is recommended:

Step 1 — Confirm Motor Voltage

The motor should be compatible with the 600 VAC-class drive.

Step 2 — Confirm Motor Current

The motor full-load current should be compared against the appropriate duty rating.

Step 3 — Determine Load Type

Identify whether the application is:

• Variable torque
• Constant torque
• High inertia
• High starting torque
• Frequent acceleration/deceleration

Step 4 — Select Duty

Determine whether Light Duty, Normal Duty, or Heavy Duty is appropriate.

Step 5 — Check Enclosure

Verify that IP54 / NEMA Type 12 is appropriate for the installation.

Step 6 — Check Mechanical Space

Verify height, width, depth, access, and lifting requirements.

Step 7 — Check Communication

Confirm that embedded EtherNet/IP matches the automation architecture.

Step 8 — Check Braking

If the machine must decelerate rapidly, verify the braking strategy because this configuration does not include an internal dynamic-braking transistor.

Step 9 — Check Grounding

Verify the CM jumper configuration against the electrical distribution and grounding system.

Step 10 — Confirm Replacement Configuration

For an existing installation, compare the complete catalog number rather than only current and horsepower.

42. Product Positioning

The 20G1AJE355AN0NNNNN sits in the high-power section of the PowerFlex 755 product family.

Its combination of:

• 600 VAC
• 355 A normal duty
• 400 HP light duty
• 350 HP normal duty
• 300 HP heavy duty
• Frame 8
• IP54 / NEMA Type 12
• 800 mm MCC-style construction
• Embedded EtherNet/IP
• EMC filter
• AC precharge
• CM jumper removed
• No HIM

makes it suitable for large industrial motor systems.

It is not intended to compete with small machine-level variable-frequency drives.

Its natural application range is large process equipment and industrial machinery.

43. Detailed Summary Table

Category	Specification
Brand	Allen-Bradley
Series	PowerFlex 755
Model	20G1AJE355AN0NNNNN
Product Type	High-Power AC Variable Frequency Drive
Input Voltage	600 VAC
Input Phase	3 Phase
Light-Duty Continuous Current	395 A
Normal-Duty Continuous Current	355 A
Heavy-Duty Continuous Current	295 A
Light-Duty Rating	400 HP
Normal-Duty Rating	350 HP
Heavy-Duty Rating	300 HP
Light-Duty 1-Minute Current	435 A
Normal-Duty 1-Minute Current	391 A
Normal-Duty 3-Second Current	533 A
Heavy-Duty 1-Minute Current	443 A
Heavy-Duty 3-Second Current	533 A
Frame	8
Enclosure	IP54
NEMA Rating	Type 12
Cabinet Style	800 mm Deep MCC Style
Cooling	Air Cooled
Network	Embedded EtherNet/IP
HIM	Blank / No HIM
Input	AC Input with Precharge
DC Terminals	None
EMC Filter	Yes
CM Jumper	Removed
Dynamic Braking	None
Approximate Height	2100–2500 mm
Approximate Width	600 mm
Approximate Depth	800 mm
Approximate Weight	600–650 kg
Installation	MCC / Floor Standing
Main Applications	Pumps, fans, blowers, conveyors, mining, cement, water/wastewater, process equipment
Lifecycle	Discontinued
Direct Replacement	20G1AJE355JN0NNNNN

44. Final Product Assessment

The Allen-Bradley 20G1AJE355AN0NNNNN is a high-power PowerFlex 755 AC drive intended for large industrial motor systems operating from a 600 VAC three-phase supply.

Its 355 A normal-duty rating, 400 HP Light-Duty rating, 350 HP Normal-Duty rating, and 300 HP Heavy-Duty rating give it a broad application range.

The Frame 8 mechanical platform provides the physical and thermal infrastructure required for this level of motor power.

The IP54 / NEMA Type 12 enclosure and 800 mm deep MCC-style construction make it suitable for substantial industrial electrical installations.

The embedded EtherNet/IP capability makes it well suited to PLC-based automation systems.

The AN0 configuration, with its blank/no-HIM arrangement, is particularly appropriate for centralized automation systems where the drive is managed through a PLC, HMI, SCADA system, or engineering workstation.

The integrated EMC filter provides additional electromagnetic-noise management, while the AC precharge architecture supports the large DC-bus system.

The CM jumper removed configuration is an important electrical detail and should be considered when matching the drive to the plant grounding and power-distribution system.

The absence of an internal dynamic-braking transistor should also be considered when the application requires rapid deceleration or significant regenerative-energy handling.

The strongest application areas include large pumps, industrial fans, blowers, conveyors, mining machinery, cement equipment, water-treatment systems, wastewater equipment, material-handling systems, and large process machinery.

For purchasing, engineering, or maintenance purposes, the most important specifications to verify are the actual motor full-load current, motor voltage, duty classification, acceleration requirements, overload requirements, ambient temperature, enclosure, mechanical dimensions, cooling requirements, motor-cable arrangement, grounding configuration, network requirements, and braking strategy.

In practical terms, the 20G1AJE355AN0NNNNN can be summarized as a 600 VAC, three-phase, 355 A normal-duty, 350 HP normal-duty-class PowerFlex 755 Frame 8 air-cooled AC packaged drive with IP54/NEMA Type 12 protection, embedded EtherNet/IP, EMC filtering, AC input precharge, no DC terminals, CM jumper removed, no internal dynamic-braking transistor, and blank/no-HIM configuration.

For an existing installation, the original catalog number should be retained in equipment records even though the configuration has been discontinued.

For replacement planning, 20G1AJE355JN0NNNNN is the direct replacement configuration identified for this model, but the complete electrical, mechanical, communication, grounding, HIM, and braking requirements should be checked before the replacement is finalized.