SIEMENS 6SL3731-7TE36-4RE0 SINAMICS S120 Cabinet Modules 2 Active Line Module 400kW 635A Right Orientation Air Cooled

The SIEMENS 6SL3731-7KE36-4RE0 SINAMICS S120 Cabinet Module stands as a robust and highly efficient solution for demanding industrial applications, offering a 400kW power output and 635A current rating. This air-cooled Active Line Module, in its right-oriented configuration, provides exceptional control and power regeneration capabilities, making it a cornerstone for modern automation systems. Its core advantages lie in its integrated power factor correction, reduced harmonic distortion, and seamless integration within the SINAMICS S120 platform, ensuring superior performance and operational reliability. Key technical parameters include an input voltage range of 400-480V AC, a frequency of 50/60Hz, and advanced thermal management for consistent operation.

Product Specifications

| Feature                 | Specification                                    |

| :---------------------- | :----------------------------------------------- |

| Product Number          | 6SL3731-7KE36-4RE0                               |

| Product Family          | SINAMICS S120 Cabinet Modules                    |

| Type                    | Active Line Module                               |

| Power                   | 400 kW                                           |

| Current Rating          | 635 A                                            |

| Cooling                 | Air Cooled                                       |

| Orientation             | Right Orientation                                |

| Input Voltage           | 400-480 V AC                                     |

| Input Frequency         | 50/60 Hz                                         |

| Protection Class        | IP20                                             |

| Dimensions (H x W x D)  | 1636 mm x 600 mm x 600 mm                        |

| Weight                  | 250 kg                                           |

| Control Options         | Integrated control unit, basic operator panel    |

| Communication Interfaces| PROFINET, PROFIBUS DP                            |

| Regeneration Capability | Yes                                              |

| Harmonic Distortion     | Low                                              |

Core Features & Market Positioning

The SINAMICS S120 Cabinet Module 6SL3731-7KE36-4RE0 distinguishes itself through its Active Line Module technology, which actively feeds reactive power back into the supply network, significantly improving the power factor and reducing energy costs. This regenerative capability is a critical differentiator in energy-intensive industries, setting it apart from conventional drives. Furthermore, its advanced control algorithms and robust construction position it as a premium choice for applications demanding high precision, dynamic response, and long-term reliability. The integration with the broader SINAMICS S120 ecosystem ensures seamless scalability and access to a comprehensive suite of automation functions.

Key Application Scenarios

This SIEMENS 6SL3731-7KE36-4RE0 SINAMICS S120 module is ideally suited for a wide array of heavy-duty industrial applications. It excels in driving large pumps and fans in process industries, such as water treatment and oil & gas, where precise flow control and energy efficiency are paramount. Additionally, its robust performance makes it a prime candidate for material handling systems, including cranes and conveyors, as well as in the manufacturing sector for applications like extruders and mixers that require high torque and continuous operation. The module's ability to handle dynamic load changes also makes it valuable in rolling mills and printing presses.

Practical System Integration Guidance

Integrating the SIEMENS 6SL3731-7KE36-4RE0 requires careful consideration of power supply, control network, and cooling requirements. Ensure the input power supply meets the 400-480V AC, 50/60Hz specifications and that appropriate circuit protection is in place. For control, establish robust communication links via PROFINET or PROFIBUS DP, connecting to a compatible SIMATIC controller. Proper air circulation around the cabinet module is essential for its air-cooled design; maintain adequate clearance as per the installation manual to prevent overheating. Wiring should adhere strictly to local electrical codes and Siemens' guidelines, particularly for the high-current power connections.

Operation and Risk Mitigation

Safe operation of the SIEMENS 6SL3731-7KE36-4RE0 SINAMICS S120 relies on adhering to the operating manual and employing qualified personnel for installation and maintenance. Before energization, verify all connections and settings. During operation, monitor thermal indicators and performance parameters to detect potential issues early. Common fault codes, such as F1, F2, or F11 related to overcurrent, overvoltage, or undervoltage, respectively, typically indicate power supply or load problems that require immediate investigation. Implementing a regular preventive maintenance schedule, including dust removal and connection checks, significantly mitigates risks of unexpected downtime and equipment failure.

Scalability & Long-Term Value

The SINAMICS S120 platform, and specifically the 6SL3731-7KE36-4RE0 module, offers significant scalability and long-term value. Its modular design allows for easy expansion and adaptation to evolving production needs by adding further drive units or control modules. Compatibility with a wide range of Siemens automation components, including PLCs and HMIs, facilitates seamless integration into existing or new digital factory infrastructures. The inherent support for advanced communication protocols like PROFINET enables straightforward connection to Industrial Internet of Things (IIoT) platforms for enhanced data acquisition, predictive maintenance, and process optimization, ensuring future-proof operation.

Frequently Asked Questions

What is the primary function of the SIEMENS 6SL3731-7KE36-4RE0?

This unit is an Active Line Module for SINAMICS S120 drives. It provides power conversion and regeneration for high-power applications.

It actively feeds energy back to the grid, improving efficiency. It is designed for demanding industrial motor control.

This module ensures stable operation and precise control of motor speed and torque. It supports applications up to 400kW.

How is harmonic distortion managed by this module?

The Active Line Module actively compensates for harmonic currents. This results in significantly lower distortion fed back to the power grid.

It inherently provides a high power factor, reducing grid impact. This compliance helps meet strict industrial power quality standards.

Active harmonic filtering is a core benefit, minimizing electrical noise. This protects other sensitive equipment on the same network.

What are the main advantages of the air-cooled design?

Air-cooled systems are often simpler to install and maintain. They eliminate the need for liquid cooling infrastructure.

This design offers reliable thermal management under normal operating conditions. It is cost-effective for many standard industrial environments.

Reduced complexity and lower operational overhead are key benefits. It ensures consistent performance through efficient heat dissipation.

Can this module be used with different motor types?

Yes, the SINAMICS S120 platform supports various motor technologies. This includes induction and synchronous motors.

The drive's advanced control functions ensure optimal performance for different motor characteristics. Consult the manual for specific motor parameterization.

Its flexibility allows adaptation to asynchronous and synchronous permanent magnet motors. This broad compatibility enhances application versatility.

What communication protocols are supported for system integration?

This module primarily supports PROFINET and PROFIBUS DP. These are industry-standard industrial Ethernet and fieldbus protocols.

These protocols enable seamless integration with SIMATIC PLCs and other automation systems. They facilitate robust data exchange and diagnostics.

Users can choose the protocol best suited for their network architecture. This ensures efficient communication and control.

What is the power regeneration capability of this unit?

The module actively regenerates energy from the motor back to the power supply. This occurs during deceleration or overhauling loads.

This regenerative function significantly improves overall system energy efficiency. It reduces the need for external braking resistors.

Recovered energy can be fed back into the grid or used by other loads on the same network. This optimizes energy consumption.

What are the typical installation considerations for this cabinet module?

Proper ventilation and clearance around the cabinet are crucial for air cooling. Install it in a clean, dry environment.

Ensure the power supply is within the specified voltage and frequency range. Use appropriately sized cabling for power and control connections.

Follow local electrical codes and Siemens' installation guidelines strictly. Correct installation is vital for safety and performance.

What are common troubleshooting steps for issues like F1 or F11 faults?

F1 typically indicates an overcurrent fault. Check for motor or load mechanical issues, and verify motor/drive parameters.

F11 indicates an undervoltage fault. Check the incoming power supply voltage and stability. Inspect power connection integrity.

For any fault, consult the SINAMICS S120 fault code list in the manual. Always disconnect power before performing checks.

How does this module contribute to system scalability?

Its modular design allows for easy integration of additional drive units. This supports expanding system capacity as needs grow.

It connects seamlessly with other SINAMICS S120 components and SIMATIC controllers. This forms a cohesive automation solution.

The communication interfaces enable straightforward upgrades and additions to control or network functions. This ensures long-term system adaptability.

What is the role of the Active Line Module technology?

Active Line Modules actively control the current waveform drawn from the supply. This dramatically reduces harmonic distortion.

They also provide a near-unity power factor, improving grid efficiency. This feature is essential for compliance and cost savings.

Unlike passive filters, they actively inject compensating currents, offering superior performance. This advanced technology ensures cleaner power.