SIEMENS 6SL3731-7TE41-2LE0 SINAMICS S120 Cabinet Modules 2 Active Line Module 710kW 1110A Left Side Mount Air Cooled

The SIEMENS 6SL3731-7KE41-2LE0 SINAMICS S120 Cabinet Module stands as a robust, air-cooled Active Line Module engineered for high-performance industrial drive applications. This unit delivers 710kW of power with a 1110A current rating and is designed for left-side mounting within a cabinet. Its advanced active infeed technology ensures a clean, sinusoidal current draw from the mains, significantly reducing harmonic distortion and improving power factor. This inherent capability minimizes the need for external filters, leading to a more compact and cost-effective system design, a critical advantage for engineers and system integrators seeking efficient and compliant motor control solutions.

Product Specifications

| Specification              | Value                                          |

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

| Product Number             | 6SL3731-7KE41-2LE0                             |

| Series                     | SINAMICS S120 Cabinet Modules                  |

| Type                       | Active Line Module                             |

| Power Rating               | 710 kW                                         |

| Current Rating             | 1110 A                                         |

| Cooling                    | Air Cooled                                     |

| Mounting                   | Left Side Mount                                |

| Voltage                    | 400 V                                          |

| Network Connection         | 3-phase AC                                     |

| Control Unit Compatibility | CU320-2 Control Unit                           |

| Protection Class           | IP20                                           |

| Dimensions (approx.)       | 2000 x 600 x 800 mm (H x W x D)      |

| Weight (approx.)           | 450 kg                               |

Core Features & Market Positioning

The SINAMICS S120 series, and specifically the 6SL3731-7KE41-2LE0, excels through its intelligent Active Line Module technology. Unlike passive line filters, this active infeed converts the incoming AC power into DC power, then synthesizes a clean sinusoidal waveform for the motor. This approach not only mitigates harmonics to meet stringent international standards like IEEE 519 but also actively feeds regenerative energy back into the supply grid, enhancing energy efficiency significantly. This regenerative capability is a key differentiator, allowing for reduced overall energy consumption in applications with frequent braking or overhauling operations. The module's robust construction and Siemens' reputation for reliability position it as a premium solution for critical industrial processes where uptime and performance are paramount.

Key Application Scenarios

This SIEMENS 6SL3731-7KE41-2LE0 is ideally suited for demanding applications across various heavy industries. Its high power and current ratings make it a prime candidate for large-scale motor control in sectors such as mining, metal processing, and material handling, where robust and continuous operation is essential. Sectors requiring precise speed control and high dynamic response, like automated manufacturing and packaging lines, also benefit from its capabilities. Furthermore, its ability to handle regenerative energy makes it perfect for applications involving cranes, elevators, and winders where energy recovery can lead to substantial operational cost savings.

Practical System Integration Guidance

Integrating the SIEMENS 6SL3731-7KE41-2LE0 into an existing Sinamics S120 system is facilitated by its modular design. It typically interfaces with a Sinamics S120 Control Unit (CU320-2 or similar) via the DRIVE-CLiQ interface for communication and control. Proper air cooling must be ensured, with adequate clearance around the cabinet to allow for efficient heat dissipation. Electrical connections require meticulous attention to detail; the module connects directly to the main power supply and to the DC bus which then feeds the Sinamics S120 Motor Modules. Earthing and grounding must be performed according to local regulations and Siemens' guidelines to ensure safety and system integrity. Commissioning typically involves parameterization using Siemens' STARTER commissioning software, where drive functions, control modes, and safety settings are configured.

Operation and Risk Mitigation

Operation of the SIEMENS 6SL3731-7KE41-2LE0 requires adherence to safety protocols, particularly concerning high voltages. Ensure the module is properly isolated before any maintenance or inspection. The IP20 protection class indicates it is protected against solid objects greater than 12.5mm and is not protected against water ingress; therefore, it must be installed in a suitable control cabinet. Common troubleshooting involves checking power supply stability, ensuring proper cooling fan operation, and verifying the integrity of the DRIVE-CLiQ connection. Critical fault codes will be displayed via the control unit's interface and should be cross-referenced with the Sinamics S120 system manuals for detailed diagnostics and resolution steps. Over-current, over-voltage, and over-temperature are typical protection triggers that require investigation into the drive's load and environmental conditions.

Scalability & Long-Term Value

The SINAMICS S120 platform is designed for scalability, allowing multiple modules to be combined to meet increased power demands or to create redundant systems. The 6SL3731-7KE41-2LE0, as part of this platform, benefits from Siemens' commitment to backward and forward compatibility within the S120 ecosystem. Integration with Industrial Internet of Things (IIoT) platforms and digital manufacturing initiatives is achievable through the various communication interfaces supported by the SINAMICS S120 control units, enabling advanced diagnostics, predictive maintenance, and remote monitoring capabilities. This ensures the long-term value of the investment by allowing for adaptation to evolving industrial automation strategies and smart factory requirements.

Frequently Asked Questions

What is the primary function of the SIEMENS 6SL3731-7KE41-2LE0?

Its primary function is to provide a clean, stable DC bus voltage to Sinamics S120 motor modules. It actively draws power from the AC mains and conditions it.

This active line module also facilitates regenerative energy feedback into the grid. It offers significant advantages in harmonic reduction and power factor correction.

The module ensures a high-quality power supply for demanding drive applications, improving overall system efficiency and reliability.

How does the Active Line Module technology differ from passive solutions?

Active Line Modules actively synthesize the power waveform, providing superior harmonic filtering. They actively manage power flow, allowing for energy regeneration.

Passive solutions typically use inductors and capacitors to filter harmonics, which are less effective and can be bulkier. Passive filters do not offer bidirectional power flow.

The advanced control in active modules leads to a significantly better power factor and reduced grid impact.

What are the key benefits of using an air-cooled module?

Air-cooled modules are generally simpler to install and maintain compared to liquid-cooled systems. They do not require coolant plumbing or management.

The 6SL3731-7KE41-2LE0 leverages integrated fans for effective heat dissipation. This design simplifies the overall cabinet layout.

Air cooling is a cost-effective solution for many industrial environments, provided adequate airflow is maintained.

What is the power and current rating of this specific module?

This module is rated for a continuous power output of 710 kW. It can handle a continuous current of 1110 Amperes.

These specifications indicate its suitability for high-power industrial motor applications. It is designed for heavy-duty operation.

Users should ensure their connected motor modules and system design do not exceed these ratings.

What control units are compatible with the 6SL3731-7KE41-2LE0?

This Active Line Module is designed to work with Siemens Sinamics S120 Control Units. It is typically paired with the CU320-2 Control Unit.

Communication between the control unit and the line module occurs via the DRIVE-CLiQ interface. This ensures seamless data exchange.

System integrators must verify the specific CU firmware and hardware version compatibility.

What are the implications of its left-side mount design?

The left-side mounting orientation is specific for certain cabinet configurations. It dictates its physical placement within an enclosure.

This design choice often optimizes space utilization in specific industrial cabinet layouts. It simplifies cabling for adjacent components.

Engineers must adhere to this mounting requirement during cabinet design and installation.

How does this module contribute to energy efficiency?

The Active Line Module's ability to feed regenerative energy back into the grid significantly enhances efficiency. This reduces overall energy consumption.

By improving the power factor, it minimizes reactive power losses. This leads to lower electricity bills.

The active filtering also reduces the need for external filtering components, saving energy and space.

What safety considerations are important for this product?

High voltages are present, necessitating strict adherence to safety lockout/tagout procedures during maintenance. The module is rated IP20, requiring installation within a protective enclosure.

Ensure proper grounding and earthing connections are made as per electrical codes and manufacturer guidelines. Personnel should be trained in high-voltage safety.

Always consult the product manual for specific safety warnings and operational limits before installation or operation.

Where can I find detailed technical documentation and manuals?

Detailed technical documentation, including user manuals and specification sheets, is available through Siemens' official support channels and product pages. It is also accessible via the Siemens Industry Online Support (SIOS) platform.

For specific integration and commissioning guides, the STARTER commissioning software's integrated help functions are invaluable. These resources provide in-depth parameter descriptions.

Always download the latest versions of documentation to ensure accuracy and compliance with current product revisions.

Can this module be used in extreme environmental conditions?

The module is rated for standard industrial environments with an IP20 protection class. It requires a controlled environment within a cabinet, free from excessive dust, moisture, or corrosive elements.

Operation is specified for certain ambient temperature ranges, typically around 0-40°C for full load, with potential derating at higher temperatures. Proper ventilation is crucial.

For applications in extreme conditions, specialized industrial solutions or enhanced environmental protection measures for the cabinet would be necessary.