SIEMENS 6SL3731-7TE35-6LE0 SINAMICS S120 Cabinet Modules 2 Active Line Module 355kW 560A Left Mounted Unit 400V

The Siemens 6SL3731-7831-7LE0 SINAMICS S120 Cabinet Module is a high-performance active line module designed for demanding industrial applications. This 355kW, 560A unit, operating at 400V, offers superior control and energy efficiency. Its key advantages include advanced thermal management, robust construction for harsh environments, and seamless integration with Siemens automation systems. Core features of the 6SL3731-7831-7LE0 include its active infeed technology, which provides a clean sinusoidal current and regenerative capability, reducing energy costs and improving power factor. The module boasts integrated safety functions and supports a wide range of communication protocols for flexible networking. Its precise motor control capabilities ensure optimal performance for variable-speed drives.

| Specification                 | Value                                          |

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

| Product Number                | 6SL3731-7831-7LE0                              |

| Product Family                | SINAMICS S120 Cabinet Module                   |

| Type                          | Active Line Module                             |

| Power Rating                  | 355 kW                                         |

| Continuous Current            | 560 A                                          |

| Voltage                       | 400 V                                          |

| Mounting                      | Left Mounted Unit                              |

| Control Technology            | Active Infeed                                  |

| Harmonic Distortion (THD)     | Low (<5%)                                      |

| Regenerative Capability       | Yes                                            |

| Integrated Safety Functions   | Yes                                            |

| Communication Protocols       | PROFINET, PROFIBUS, EtherNet/IP (optional)     |

| Ambient Temperature Range     | -20°C to +55°C                                 |

| Protection Rating             | IP20                                           |

Core Features & Market Positioning

The Siemens 6SL3731-7831-7LE0 SINAMICS S120 cabinet module stands out in the market for its advanced active infeed technology, a significant differentiator that ensures a near-sinusoidal current waveform, drastically reducing harmonic distortion. This not only complies with stringent grid codes but also contributes to a higher power factor, leading to substantial energy savings and operational efficiency. Its robust design and comprehensive protection features position it as a reliable solution for critical industrial processes where uptime and performance are paramount. The integration with the broader SINAMICS S120 platform allows for a cohesive and powerful drive system, making it a preferred choice for system integrators and end-users seeking cutting-edge automation solutions.

Key Application Scenarios

This high-capacity active line module is ideally suited for a wide array of heavy-duty industrial applications where precise speed control, high torque, and energy efficiency are critical. Common scenarios include its deployment in complex machine tools for manufacturing, large-scale material handling systems in logistics, and sophisticated process control applications within the chemical and petrochemical industries. Its ability to handle high dynamic loads and provide regenerative energy feedback makes it particularly valuable in applications like extruders, mixers, and cranes, where energy can be recaptured and fed back into the grid or other parts of the plant.

Practical System Integration Guidance

Integrating the Siemens 6SL3731-7831-7LE0 into an existing automation architecture is streamlined through its compatibility with the SINAMICS S120 system and various industrial communication protocols. Proper installation requires adherence to electrical safety standards, including correct grounding and power supply connections, ensuring the 400V input is stable and within tolerance. For commissioning, utilizing Siemens' STARTER commissioning software is recommended, which facilitates parameterization, diagnostics, and motor identification for optimal performance. Interconnecting with other drive components, such as motor modules and control units, should follow the specific guidelines outlined in the SINAMICS S120 system manual to ensure proper communication and synchronization.

Operation and Risk Mitigation

Safe operation of the Siemens 6SL3731-7831-7LE0 is paramount and is facilitated by its integrated safety functions, such as Safe Torque Off (STO), which can prevent unintended machine movement. Users should always ensure that all safety regulations and local electrical codes are strictly followed during installation and maintenance. Common troubleshooting might involve checking power supply stability, verifying communication links, and ensuring motor parameters are correctly set. Critical fault codes, often displayed on the drive's alphanumeric display or via the commissioning software, should be cross-referenced with the product's technical documentation for detailed diagnostic and resolution steps.

Scalability & Long-Term Value

The SINAMICS S120 platform, including the 6SL3731-7831-7LE0 cabinet module, offers significant scalability, allowing for system expansion by adding more motor modules or drive components as application requirements grow. Its compatibility with previous and future generations of Siemens automation components ensures long-term investment protection and seamless integration with evolving technologies. Furthermore, its advanced capabilities align with the principles of Industry 4.0 and the Industrial Internet of Things (IIoT), enabling enhanced data acquisition, predictive maintenance, and integration into smart factory environments for optimized production and operational efficiency.

FAQs

What is the primary function of the Siemens 6SL3731-7831-7LE0?

This active line module provides a clean and efficient power supply to SINAMICS S120 drives. It conditions incoming grid power, reducing harmonics and enabling regenerative energy feedback. This enhances overall system efficiency and grid compatibility.

How does the active infeed technology benefit my application?

Active infeed technology ensures a low total harmonic distortion (THD), typically below 5%. This compliance reduces energy waste and simplifies grid connection requirements. It also allows for power factor correction and can feed energy back to the grid.

What are the main advantages of using SINAMICS S120 cabinet modules?

SINAMICS S120 cabinet modules offer robust, modular solutions for high-power drives. They provide excellent control performance, integrated safety, and flexible communication options. Their cabinet design simplifies installation and protects components in harsh environments.

What voltage does the Siemens 6SL3731-7831-7LE0 operate on?

This specific Siemens module operates on a 400V power supply. It is designed to efficiently handle the power requirements for demanding industrial applications at this voltage level. Always ensure your power source meets this specification for safe and optimal operation.

What is the power and current rating of this module?

The Siemens 6SL3731-7831-7LE0 has a power rating of 355kW and a continuous current rating of 560A. These specifications indicate its capability to drive high-performance motors in heavy-duty industrial settings. Proper application sizing is crucial for system reliability.

Can this module be used for regenerative braking?

Yes, the active infeed technology of the 6SL3731-7831-7LE0 inherently supports regenerative braking. This feature allows energy generated during deceleration to be fed back into the power supply, improving energy efficiency. It's a key benefit for applications with frequent stopping and starting.

What are the environmental considerations for installing this module?

The module has an IP20 protection rating, suitable for controlled industrial environments. It can operate in ambient temperatures from -20°C to +55°C. Ensure adequate ventilation and protection from excessive dust or moisture are provided.

How is this module integrated into a larger system?

It integrates as part of the SINAMICS S120 drive system, often connected to motor modules and control units. Communication typically occurs via PROFINET or PROFIBUS, configurable through Siemens STARTER software. Refer to the system manual for detailed interconnection.

What safety features are included with this module?

This module includes integrated safety functions, such as Safe Torque Off (STO). This function is critical for preventing unintended machine movement during maintenance or emergency situations, enhancing operational safety. It can be activated via external safety relays or controllers.

Is this module compatible with older SINAMICS systems?

While part of the SINAMICS S120 family, compatibility with very old SINAMICS generations may vary. The S120 platform is designed for modern automation. Ensure your control and motor modules are compatible with the S120 system for seamless integration.