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The Allen-Bradley 20G11TD740JN0NNNNN is a high-power PowerFlex 755 AC Drive designed for large industrial motor-control systems where high current capacity, dependable speed regulation, network communication, and flexible drive control are required.
This model is part of the PowerFlex 755 series and is configured for 480 VAC, three-phase power systems.
It has a 740 A Normal Duty output rating, with approximately 700 HP Light Duty, 650 HP Normal Duty, and 500 HP Heavy Duty motor capability.
The drive uses a large Frame 8 construction and forced-air cooling. It is intended for substantial industrial installations rather than compact machinery.
Applications can include large conveyors, pumps, fans, blowers, compressors, crushers, material-handling equipment, mining machinery, cement equipment, steel-processing systems, and other large process machines.
A major feature of this model is its embedded EtherNet/IP communication. This allows the drive to be integrated into a plant automation network and exchange operating commands, speed references, status information, alarms, faults, and diagnostic information with compatible control systems.
The 20G11TD740JN0NNNNN is also configured with filtered input and the CM jumper installed, which distinguishes it from the closely related AN configuration.
| Item | Description |
|---|---|
| Brand | Allen-Bradley |
| Product Family | PowerFlex |
| Series | PowerFlex 755 |
| Product Type | High-Power AC Variable Frequency Drive |
| Catalog Number | 20G11TD740JN0NNNNN |
| Drive Architecture | PowerFlex 755 |
| Cooling Type | Forced Air |
| Mechanical Frame | Frame 8 |
| Voltage Class | 480 VAC |
| Phase | Three Phase |
| Communication | Embedded EtherNet/IP |
| Installation Category | Large Industrial Drive |
| Typical Application | Large Motor and Process Control |
The PowerFlex 755 series is positioned for industrial applications where the drive needs to provide more than basic frequency control.
It is intended for applications requiring advanced motor control, flexible configuration, industrial networking, diagnostics, and integration with larger automation systems.
| Parameter | Specification |
|---|---|
| Model | 20G11TD740JN0NNNNN |
| Brand | Allen-Bradley |
| Series | PowerFlex 755 |
| Product Type | Air-Cooled AC Drive |
| Rated Voltage | 480 VAC |
| Input Phase | 3 Phase |
| Output Current | 740 A |
| Light Duty Rating | 700 HP |
| Normal Duty Rating | 650 HP |
| Heavy Duty Rating | 500 HP |
| Approx. Light Duty Power | 522 kW |
| Approx. Normal Duty Power | 485 kW |
| Approx. Heavy Duty Power | 373 kW |
| Frame Size | Frame 8 |
| Enclosure / Construction | Open Type |
| Cooling | Forced Air |
| Input Type | AC Input with Precharge |
| DC Terminals | Included |
| EMC Filtering | Filtered |
| CM Jumper | Installed |
| CM Jumper Configuration | Preferred / Installed |
| Dynamic Braking | None |
| HIM | Blank / No HIM |
| Network | Embedded EtherNet/IP |
| Installation | Floor-Mount / Large Industrial Installation |
| Approx. Width | 720 mm |
| Approx. Height | 2,185 mm |
| Approx. Depth | 650 mm |
| Approx. Weight | 335 kg |
The 740 A rating makes this one of the larger standard Frame 8 configurations within the PowerFlex 755 floor-mount range.
The model is intended for large motors and high-power industrial machinery where current capacity is a primary design consideration.
The drive has three important application ratings.
| Duty Classification | Output Current | Motor Rating | Approx. Power |
|---|---|---|---|
| Light Duty | 800 A class | 700 HP | 522 kW |
| Normal Duty | 740 A | 650 HP | 485 kW |
| Heavy Duty | 617 A class | 500 HP | 373 kW |
The 650 HP Normal Duty rating is particularly important when evaluating this model for continuous industrial applications.
The drive can support a larger horsepower rating under Light Duty conditions, while the Heavy Duty rating is lower because heavy-duty operation can impose higher thermal and overload demands.
The correct duty rating should therefore be selected according to the actual load profile rather than simply matching the drive to the motor nameplate horsepower.
| Electrical Parameter | Specification |
|---|---|
| Catalog Number | 20G11TD740JN0NNNNN |
| Supply Voltage | 480 VAC |
| Supply Phase | Three Phase |
| AC Input | Yes |
| Precharge | Included |
| DC Terminals | Yes |
| Output Current | 740 A class |
| LD Current Class | 800 A |
| ND Current Class | 740 A |
| HD Current Class | 617 A |
| LD Motor Rating | 700 HP |
| ND Motor Rating | 650 HP |
| HD Motor Rating | 500 HP |
| Cooling | Forced Air |
| Input Filtering | Filtered |
| Common-Mode Jumper | Installed |
| Dynamic Braking | None |
| HIM | No HIM / Blank |
| Communication | Embedded EtherNet/IP |
The drive’s AC input section includes precharge.
Precharge is particularly important on large drives because the DC bus contains substantial energy-storage components and the initial energization process needs to be managed properly.
The inclusion of DC terminals also provides additional flexibility for electrical-system architectures where DC-bus connections are required.
The 20G11TD740JN0NNNNN is designed for very large industrial motors.
Its approximate power capability can be summarized as follows:
| Duty | HP | Approx. kW | Typical Load Character |
|---|---|---|---|
| Light Duty | 700 HP | 522 kW | Moderate overload requirement |
| Normal Duty | 650 HP | 485 kW | Continuous industrial operation |
| Heavy Duty | 500 HP | 373 kW | Higher overload / demanding load |
The Normal Duty rating makes the drive particularly useful for large continuous-process equipment.
For applications such as large centrifugal pumps or fans, the Light Duty rating may be more relevant.
For machinery with repeated acceleration, heavy inertia, or high starting torque requirements, the Heavy Duty rating needs to be considered carefully.
The 20G11TD740JN0NNNNN uses a Frame 8 architecture.
Frame 8 is intended for high-power drive applications.
Compared with compact variable-frequency drives, the physical structure is considerably larger because the drive must accommodate:
The larger frame also makes it easier to integrate a high-power drive into a dedicated industrial electrical room or large drive cabinet.
The following dimensions should be regarded as approximate engineering reference values for the Frame 8 configuration.
The final mechanical arrangement can vary depending on the exact installation, accessories, cabinet design, and mounting architecture.
| Mechanical Parameter | Approximate Value |
|---|---|
| Model | 20G11TD740JN0NNNNN |
| Frame | 8 |
| Width | Approx. 720 mm |
| Height | Approx. 2,185 mm |
| Depth | Approx. 650 mm |
| Weight | Approx. 335 kg |
| Mounting | Floor Mount |
| Construction | Open Type |
| Cooling | Forced Air |
| Installation Space | Large Electrical Room / Drive Cabinet |
| Handling | Mechanical Lifting Equipment Required |
A weight of approximately 335 kg means that the drive should be handled as heavy industrial equipment.
The installation plan should include appropriate lifting equipment and sufficient floor-loading capacity.
The drive should also have adequate clearance for cooling airflow and maintenance access.
For final mechanical design, cabinet fabrication, transportation, and installation, the exact product dimension drawing should take precedence over these approximate reference values.
The drive uses forced-air cooling.
High-power drives generate substantial heat during operation, so thermal management is one of the most important installation considerations.
The cooling system requires:
Dust and contamination can gradually restrict airflow and reduce cooling performance.
For this reason, the cooling system should be included in the plant’s preventive-maintenance program.
The 20G11TD740JN0NNNNN includes embedded EtherNet/IP communication.
This allows the drive to become part of a larger automation system.
Typical communication functions can include:
In a large plant, this can reduce the need for separate hardwired control signals for every drive function.
The drive can communicate directly with the plant automation system, allowing operators and maintenance personnel to obtain drive information from the central control environment.
One of the defining configuration characteristics of this model is:
Filtered, CM Jumper Installed (Preferred).
This is different from the earlier AN configuration.
| Configuration | 20G11TD740AN0NNNNN | 20G11TD740JN0NNNNN |
|---|---|---|
| Series | PowerFlex 755 | PowerFlex 755 |
| Voltage | 480 VAC | 480 VAC |
| Current | 740 A | 740 A |
| Frame | 8 | 8 |
| Cooling | Forced Air | Forced Air |
| Filtering | Filtered | Filtered |
| CM Jumper | Removed | Installed |
| Dynamic Braking | None | None |
| HIM | Blank | Blank |
| DC Terminals | Yes | Yes |
| EtherNet/IP | Embedded | Embedded |
The JN configuration uses the CM jumper installed.
This is an important catalog-level distinction and should be considered when replacing an older configuration.
A replacement drive should always be evaluated using the complete catalog number.
The drive is well suited to large conveyor systems.
Heavy conveyors can require several hundred horsepower, especially in:
Variable-speed control allows the conveyor to accelerate and decelerate more smoothly.
This can reduce mechanical shock and improve control of material flow.
Mining applications frequently require large motors and high-current drive systems.
Typical applications include:
The Frame 8 design makes the drive appropriate for large fixed mining installations where substantial motor power is required.
Cement manufacturing involves numerous large motor-driven machines.
Potential applications include:
The high current capacity makes the drive suitable for large machines where smaller drives would not have enough output capability.
Large steel and metal-processing plants use high-power motors throughout their production systems.
The drive can be considered for:
The embedded EtherNet/IP interface can also help integrate the drive into centralized production control.
Large pumps are one of the most common applications for high-power AC drives.
Potential applications include:
Variable-speed control can allow the pump motor to operate according to actual process requirements.
For centrifugal-pump applications, reducing motor speed can also reduce energy consumption when the process permits variable-flow operation.
Large industrial fans and blowers can require hundreds of horsepower.
Typical applications include:
The drive allows the motor speed to be adjusted rather than operating continuously at one fixed speed.
Large compressors can also use high-power variable-speed drives.
Possible applications include:
Compressor applications should be evaluated carefully because different compressor designs can have very different torque and operating characteristics.
The drive is appropriate for large material-handling equipment.
Potential applications include:
Where the machinery experiences frequent acceleration or high mechanical inertia, the Heavy Duty rating should be evaluated rather than relying solely on the nominal motor horsepower.
The PowerFlex 755 architecture is also appropriate for continuous-process industries.
Potential industries include:
The ability to integrate the drive into a larger automation network is particularly useful in these environments.
The biggest advantage of the 20G11TD740JN0NNNNN is its high current capability.
A 740 A Normal Duty rating places this drive in the high-power industrial category.
It is intended for large motors where smaller PowerFlex drives cannot provide sufficient output current.
The drive provides approximately:
This gives engineers flexibility when matching the drive to different load profiles.
The PowerFlex 755 series is designed for applications requiring more than basic variable-frequency control.
It can be incorporated into sophisticated industrial systems where speed regulation, diagnostics, feedback, networking, and process integration are important.
Embedded EtherNet/IP provides convenient integration with industrial automation systems.
The drive can exchange data with controllers and provide operational information to HMIs and supervisory systems.
The JN configuration includes the common-mode jumper installed.
This is an important configuration feature when comparing the drive with earlier AN versions.
The filtered configuration supports applications where electromagnetic compatibility is an important consideration.
The filtering should still be combined with proper grounding, shielding, cable routing, and installation practices.
The drive includes DC terminals.
This provides additional flexibility for system architectures involving DC-bus connections.
Forced-air cooling is appropriate for the high-power electrical components used in a Frame 8 drive.
Proper ventilation and regular maintenance remain essential.
The drive is particularly useful where multiple high-power motors need to be integrated into a common automation architecture.
A plant can use related PowerFlex 755 models at different power levels while maintaining a common drive platform.
| Installation Factor | Recommendation |
|---|---|
| Supply | 480 VAC, 3 Phase |
| Grounding | Proper industrial grounding |
| Upstream Protection | Correctly sized protection system |
| Motor Cable | Correctly sized for application |
| EMC | Proper cable routing and shielding |
| Cooling | Adequate forced-air ventilation |
| Cabinet | Large Frame 8-compatible installation |
| Floor Loading | Suitable for approximately 335 kg reference weight |
| Lifting | Mechanical lifting equipment |
| Service Access | Adequate clearance |
| Ambient Environment | Within specified operating conditions |
| Network | EtherNet/IP architecture |
| Maintenance | Regular cooling and electrical inspection |
The following models are closely related to the requested model and are useful when selecting different current and horsepower levels within the same PowerFlex 755 family.
| Model | Voltage | Frame | LD Current | ND Current | HD Current | LD HP | ND HP | HD HP |
|---|---|---|---|---|---|---|---|---|
| 20G11TD430JN0NNNNN | 480 VAC, 3 PH | 8 | 485 A | 430 A | 370 A | 400 HP | 350 HP | 300 HP |
| 20G11TD485JN0NNNNN | 480 VAC, 3 PH | 8 | 545 A | 485 A | 414 A | 450 HP | 400 HP | 350 HP |
| 20G11TD545JN0NNNNN | 480 VAC, 3 PH | 8 | 590 A | 545 A | 454 A | 500 HP | 450 HP | 350 HP |
| 20G11TD617JN0NNNNN | 480 VAC, 3 PH | 8 | 710 A | 617 A | 485 A | 600 HP | 500 HP | 400 HP |
| 20G11TD710JN0NNNNN | 480 VAC, 3 PH | 8 | 765 A | 710 A | 545 A | 650 HP | 600 HP | 450 HP |
These models form a practical sizing progression.
The 20G11TD617JN0NNNNN is suitable for applications around the 500 HP Normal Duty range.
The 20G11TD710JN0NNNNN moves into the approximately 600 HP Normal Duty class.
The requested 20G11TD740JN0NNNNN increases the Normal Duty capability to approximately 650 HP.
| Model | LD Current | ND Current | HD Current | LD HP | ND HP | HD HP | Frame |
|---|---|---|---|---|---|---|---|
| 20G11TD430JN0NNNNN | 485 A | 430 A | 370 A | 400 | 350 | 300 | 8 |
| 20G11TD485JN0NNNNN | 545 A | 485 A | 414 A | 450 | 400 | 350 | 8 |
| 20G11TD545JN0NNNNN | 590 A | 545 A | 454 A | 500 | 450 | 350 | 8 |
| 20G11TD617JN0NNNNN | 710 A | 617 A | 485 A | 600 | 500 | 400 | 8 |
| 20G11TD710JN0NNNNN | 765 A | 710 A | 545 A | 650 | 600 | 450 | 8 |
| 20G11TD740JN0NNNNN | 800 A | 740 A | 617 A | 700 | 650 | 500 | 8 |
This progression is useful when standardizing large-drive installations.
Instead of selecting unrelated drive families for every motor, a plant can use a consistent PowerFlex 755 architecture and select the current rating according to the motor and process.
The following models belong to other PowerFlex families and can be considered for smaller or different applications.
They are not direct replacements for the 20G11TD740JN0NNNNN.
| Model | Series | Voltage Class | Phase | Current Class | Approx. Application Size | Typical Application |
|---|---|---|---|---|---|---|
| 25B-D024N114 | PowerFlex 525 | 480 VAC | 3 PH | 24 A class | Small / Medium | General machinery |
| 25B-D6P0N114 | PowerFlex 525 | 480 VAC | 3 PH | 6 A class | Small | Pumps, fans, conveyors |
| 20F11NC3P4JA0NNNNN | PowerFlex 753 | 480 VAC | 3 PH | 3.4 A class | Small | Machine and process control |
| 20F11ND077AA0NNNNN | PowerFlex 753 | 480 VAC | 3 PH | 77 A class | Medium | Industrial machinery |
| 25C-D043N114 | PowerFlex 523 | 480 VAC | 3 PH | 43 A class | Medium | General-purpose motor control |
These models occupy very different power ranges.
The PowerFlex 523 and PowerFlex 525 families are generally better suited to compact machines and smaller motors.
The PowerFlex 753 family provides a more advanced industrial-drive option for applications that do not require the very large current capacity of the PowerFlex 755 Frame 8.
The 20G11TD740JN0NNNNN is intended for substantially larger industrial motors.
| Model | Series | Voltage | Phase | Current Class | General Size | Main Application |
|---|---|---|---|---|---|---|
| 25B-D024N114 | PowerFlex 525 | 480 VAC | 3 PH | 24 A | Compact | General industrial machinery |
| 25B-D6P0N114 | PowerFlex 525 | 480 VAC | 3 PH | 6 A | Compact | Small motor applications |
| 20F11NC3P4JA0NNNNN | PowerFlex 753 | 480 VAC | 3 PH | 3.4 A | Small | Process and machine control |
| 20F11ND077AA0NNNNN | PowerFlex 753 | 480 VAC | 3 PH | 77 A | Medium | Industrial machinery |
| 25C-D043N114 | PowerFlex 523 | 480 VAC | 3 PH | 43 A | Compact / Medium | General motor control |
The closest configuration comparison is between 20G11TD740AN0NNNNN and 20G11TD740JN0NNNNN.
The electrical power capability is essentially the same, but the CM-jumper configuration differs.
| Parameter | 20G11TD740AN0NNNNN | 20G11TD740JN0NNNNN |
|---|---|---|
| Product Family | PowerFlex 755 | PowerFlex 755 |
| Voltage | 480 VAC | 480 VAC |
| Phase | 3 PH | 3 PH |
| LD Rating | 700 HP | 700 HP |
| ND Rating | 650 HP | 650 HP |
| HD Rating | 500 HP | 500 HP |
| Current Class | 740 A | 740 A |
| Frame | 8 | 8 |
| Cooling | Forced Air | Forced Air |
| Input | AC with Precharge and DC Terminals | AC with Precharge and DC Terminals |
| Filtering | Filtered | Filtered |
| CM Jumper | Removed | Installed |
| Dynamic Braking | None | None |
| HIM | Blank / No HIM | Blank / No HIM |
| EtherNet/IP | Embedded | Embedded |
The JN configuration is the version with the CM jumper installed.
This is an important detail when planning a replacement or comparing two catalog numbers that otherwise appear almost identical.
These two models are also closely related.
| Parameter | 20G11TD710JN0NNNNN | 20G11TD740JN0NNNNN |
|---|---|---|
| Voltage | 480 VAC | 480 VAC |
| Frame | 8 | 8 |
| LD Current | 765 A | 800 A |
| ND Current | 710 A | 740 A |
| HD Current | 545 A | 617 A |
| LD HP | 650 HP | 700 HP |
| ND HP | 600 HP | 650 HP |
| HD HP | 450 HP | 500 HP |
| Cooling | Forced Air | Forced Air |
| Filtering | Filtered | Filtered |
| CM Jumper | Installed | Installed |
| DC Terminals | Yes | Yes |
| Dynamic Braking | None | None |
| HIM | Blank | Blank |
The 20G11TD740JN0NNNNN provides higher current and horsepower capability.
For a 650 HP Normal Duty application, the 740 A model is the more appropriate member of this pair.
For a 600 HP Normal Duty application, the 710 A model may be more appropriately sized.
Because this is a Frame 8 high-power drive, mechanical installation should be planned at the beginning of the project.
The approximate physical reference dimensions are:
| Mechanical Specification | Approximate Value |
|---|---|
| Model | 20G11TD740JN0NNNNN |
| Width | 720 mm |
| Height | 2,185 mm |
| Depth | 650 mm |
| Weight | 335 kg |
| Frame | 8 |
| Mounting | Floor Mount |
| Cooling | Forced Air |
The height of approximately 2.2 meters means that the installation area needs sufficient vertical clearance.
The approximate 335 kg weight also means that transportation, positioning, and installation require appropriate mechanical handling equipment.
For a large industrial project, the equipment route should be checked before delivery.
Door dimensions, floor conditions, lifting points, cabinet access, and final mounting position should all be considered.
Regular preventive maintenance can help maintain reliable operation.
Typical inspection items include:
The cooling system deserves particular attention.
High-power semiconductor equipment depends heavily on effective thermal management.
Restricted airflow can cause higher internal temperatures and increase thermal stress on electrical components.
| Industry | Typical Application |
|---|---|
| Mining | Conveyors, crushers, fans, pumps |
| Cement | Crushers, fans, conveyors, pumps |
| Steel | Fans, pumps, conveyors, process equipment |
| Water Treatment | Large pumps and blowers |
| Chemical Processing | Pumps, compressors, fans |
| Manufacturing | Large production machinery |
| Utilities | Pumps, fans, auxiliary equipment |
| Bulk Material Handling | Conveyors, feeders, transfer systems |
| Heavy Industry | Large motor-driven equipment |
| Process Industry | Pumps, fans, compressors and conveyors |
Before selecting the 20G11TD740JN0NNNNN, engineers should review the following:
| Selection Parameter | Importance |
|---|---|
| Motor Voltage | Critical |
| Motor Current | Critical |
| Motor Horsepower | Critical |
| Duty Classification | Critical |
| Required Overload | Critical |
| Acceleration Requirement | Important |
| Deceleration Requirement | Important |
| Load Inertia | Important |
| Ambient Temperature | Important |
| Installation Altitude | Important |
| Motor Cable Length | Important |
| EMC Requirements | Important |
| Cooling Arrangement | Critical |
| Cabinet Space | Critical |
| Floor Loading | Important |
| Network Architecture | Important |
| Maintenance Access | Important |
The motor’s rated current should be checked carefully.
A drive should not be selected solely by comparing horsepower numbers.
The actual current requirement, load profile, overload requirement, and operating environment are all important.
| Category | Specification |
|---|---|
| Brand | Allen-Bradley |
| Series | PowerFlex 755 |
| Model | 20G11TD740JN0NNNNN |
| Product Type | High-Power AC Drive |
| Voltage | 480 VAC |
| Phase | Three Phase |
| Current | 740 A |
| Light Duty | 700 HP |
| Normal Duty | 650 HP |
| Heavy Duty | 500 HP |
| Approx. LD Power | 522 kW |
| Approx. ND Power | 485 kW |
| Approx. HD Power | 373 kW |
| Frame | 8 |
| Cooling | Forced Air |
| Construction | Open Type |
| Input | AC Input with Precharge |
| DC Terminals | Yes |
| Filtering | Filtered |
| CM Jumper | Installed |
| Dynamic Braking | None |
| HIM | Blank / No HIM |
| Communication | Embedded EtherNet/IP |
| Approx. Width | 720 mm |
| Approx. Height | 2,185 mm |
| Approx. Depth | 650 mm |
| Approx. Weight | 335 kg |
| Installation | Floor Mount |
| Main Application | Large Industrial Motor Control |
The Allen-Bradley 20G11TD740JN0NNNNN PowerFlex 755 AC Drive is a high-capacity industrial variable-frequency drive designed for large three-phase motor applications.
Its 480 VAC supply, 740 A Normal Duty capacity, 700 HP Light Duty capability, 650 HP Normal Duty capability, and 500 HP Heavy Duty capability make it suitable for large process machinery and heavy industrial equipment.
The Frame 8 construction provides the physical platform required for high-current power conversion, while forced-air cooling provides the thermal management necessary for high-power operation.
The integrated EtherNet/IP interface is another major advantage.
In a modern production plant, the drive can be connected to the control network and provide operating status, speed information, current information, alarms, faults, and other diagnostic data.
The filtered configuration with the CM jumper installed is an important characteristic of the JN version.
This makes the complete catalog number important when selecting a replacement or comparing it with the related AN configuration.
The approximate 720 × 2,185 × 650 mm dimensions and approximately 335 kg weight also place this product firmly in the large industrial equipment category.
It requires proper mechanical handling, floor support, ventilation, service clearance, and electrical installation planning.
For large conveyors, mining equipment, cement machinery, crushers, pumps, fans, blowers, compressors, material-handling equipment, steel-processing machinery, and other high-power industrial systems, this model provides a strong combination of high-current capability and automation integration.
For plant standardization, the closely related PowerFlex 755 Frame 8 models provide a useful range of current ratings.
The 20G11TD617JN0NNNNN, 20G11TD710JN0NNNNN, and 20G11TD740JN0NNNNN, for example, provide progressively higher power capability and can be selected according to the actual motor current and duty requirements.
Overall, the 20G11TD740JN0NNNNN is best suited to large industrial installations where high motor power, robust drive architecture, networked control, flexible duty selection, and long-term maintainability are important.
It is not a compact machine drive and should not be evaluated on physical size alone.
Its real value is in applications where a large motor must be controlled as part of a broader industrial automation system.