SIEMENS 6SL3731-7TE37-5RE0 SINAMICS S120 Cabinet Modules 2 Active Line Module 450kW 745A Right Hand Mount 400V

The SIEMENS 6SL3731-7KE37-5RE0 SINAMICS S120 Cabinet Module stands as a pinnacle of advanced motor control technology, offering robust performance and exceptional energy efficiency for demanding industrial applications. This Active Line Module, rated at 450kW and 745A with a 400V supply, is engineered for superior reliability and seamless integration into complex automation systems. Its advanced features ensure precise motion control, enhanced system availability, and optimized operational costs, positioning it as a strategic investment for industries prioritizing productivity and technological leadership.

Product Specifications

| Feature                     | Specification                                              |

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

| Product Number              | 6SL3731-7KE37-5RE0                                         |

| Product Family              | SINAMICS S120 Cabinet Modules                              |

| Module Type                 | Active Line Module                                         |

| Power Rating                | 450 kW                                                     |

| Current Rating              | 745 A                                                      |

| Voltage                     | 400 V                                                      |

| Mount Type                  | Right Hand Mount                                           |

| Control Type                | Advanced vector control, servo control, V/f control        |

| Communication Interfaces    | PROFIBUS DP, PROFINET IO, EtherNet/IP (optional)           |

| Protection Class            | IP20                                                       |

| Ambient Temperature Range   | 0°C to +45°C (derating above 40°C)                          |

| Dimensions (H x W x D)      | Varies by cabinet configuration, consult documentation       |

| Weight                      | Varies by cabinet configuration, consult documentation       |

| Harmonic Distortion (THDi)  | < 5% with line reactor, < 3% with AFE                      |

| Efficiency                  | High, regenerative capability                              |

Core Features & Market Positioning

The SIEMENS 6SL3731-7KE37-5RE0 SINAMICS S120 cabinet module is distinguished by its Active Line Module technology, which enables energy regeneration back to the grid, significantly reducing operational power consumption and costs. This regenerative capability, coupled with its advanced control algorithms, positions it as a highly energy-efficient and economically advantageous solution in competitive markets. The S120 platform is renowned for its modularity and flexibility, allowing for tailored configurations to meet specific application demands, a key differentiator against less adaptable drive systems. Its integration into Siemens' broader Digital Industries portfolio further enhances its market appeal, offering seamless connectivity with other automation and digitalization solutions.

Key Application Scenarios

This SIEMENS SINAMICS S120 unit excels in high-performance applications such as complex material handling systems, where precise speed and torque control are paramount for efficient operation. It is ideally suited for the metal processing industry, including rolling mills and processing lines, that require robust drives capable of handling high torque demands and dynamic load changes. Furthermore, its suitability for the printing and paper industry, particularly in large-scale machinery, highlights its versatility in managing continuous processes with exceptional accuracy and reliability. The 450kW power rating and 745A current capacity make it a prime choice for heavy-duty machinery and continuous processing lines across various manufacturing sectors.

Practical System Integration Guidance

Integrating the SIEMENS 6SL3731-7KE37-5RE0 typically involves careful planning within a SINAMICS S120 cabinet system. Proper ventilation and ambient temperature management are critical for optimal performance and longevity, with recommendations often specifying operation within a 0°C to +45°C range. Electrical connections must adhere strictly to local codes and Siemens' guidelines, ensuring correct phasing and grounding for safety and system integrity. Commissioning often utilizes Siemens' STARTER engineering software, allowing for detailed parameterization of motor data, control modes, and safety functions, facilitating a smooth transition from setup to operational readiness.

Operation and Risk Mitigation

Safe operation of the SINAMICS S120 cabinet module requires adherence to established safety protocols, including lockout/tagout procedures during maintenance and ensuring all protective covers are in place. Common operational risks include overheating due to inadequate ventilation or overloading beyond the specified 450kW and 745A ratings. Monitoring diagnostic messages via the HMI or engineering software is crucial for proactive maintenance and identifying potential issues before they escalate. Fault codes, such as F0001 (Overcurrent) or F0002 (Overvoltage), signal critical system states that necessitate immediate investigation and appropriate corrective actions to prevent equipment damage.

Scalability & Long-Term Value

The modular design of the SINAMICS S120 platform, including the 6SL3731-7KE37-5RE0, inherently supports scalability, allowing for system expansion by adding further drive units or modules as production needs evolve. Compatibility with Siemens' comprehensive automation ecosystem, including PLCs like SIMATIC S7 and HMI devices, ensures seamless integration and supports future upgrades to advanced digital solutions. This interoperability enhances the long-term value by facilitating the adoption of Industrial Internet of Things (IIoT) capabilities, predictive maintenance, and advanced analytics, driving further efficiency and operational intelligence.

Frequently Asked Questions (FAQs)

What is the primary function of the SIEMENS 6SL3731-7KE37-5RE0?

This unit serves as an Active Line Module within the SINAMICS S120 drive system, providing regulated DC bus voltage. It enables energy regeneration back to the mains, improving overall system efficiency.

It is designed for high-power industrial applications requiring precise motor control. The module offers advanced functionalities for vector and servo control.

Its key role is to ensure a stable DC link for connected motor modules, managing power flow bidirectionally for optimal energy utilization.

How does the Active Line Module differ from a standard line module?

Active Line Modules actively regulate the DC bus voltage and can feed energy back into the supply network. Standard line modules typically only provide a passive connection or basic voltage regulation.

This regenerative capability reduces energy waste and lowers operational costs, a significant advantage over passive solutions. The active nature also contributes to lower harmonic distortion.

The advanced control within the Active Line Module allows for more sophisticated power management and grid interaction compared to simpler line modules.

What are the typical applications for a 450kW SINAMICS S120 Cabinet Module?

These modules are ideal for heavy-duty industrial machinery and continuous process industries. Applications include large pumps, fans, extruders, and material handling systems.

Metal processing, such as rolling mills and metal forming machines, benefits from the high torque and precise control offered. It's also common in the printing and paper industries for large-format machinery.

The robust design and high power rating make it suitable for applications demanding sustained high performance and reliability under challenging conditions.

What is the voltage and current rating of the SIEMENS 6SL3731-7KE37-5RE0?

The module operates with a 400V supply voltage. It has a rated current of 745A.

This specification indicates its capacity for handling substantial power demands in industrial settings. It is designed for robust performance in demanding environments.

Ensuring the power supply matches the 400V requirement is crucial for proper operation and to avoid damage to the unit. The 745A rating dictates the maximum continuous current it can safely handle.

Can this module be integrated into existing automation systems?

Yes, the SINAMICS S120 platform offers robust communication interfaces like PROFIBUS and PROFINET. This allows for seamless integration with Siemens SIMATIC PLCs and other automation components.

The system's modularity and open architecture facilitate its incorporation into both new and existing control architectures. It supports standard industrial communication protocols.

Integration may require specific engineering software and configuration adjustments to align with the existing system's logic and network topology.

What are the benefits of using an Active Line Module for energy efficiency?

Active Line Modules enable energy regeneration, feeding surplus energy back to the grid instead of dissipating it as heat. This directly reduces overall energy consumption.

By returning energy, operational costs are lowered, and the carbon footprint of the machinery is decreased. This is especially beneficial in applications with frequent braking or load variations.

The active power factor correction also contributes to grid quality and efficiency, further enhancing the economic and environmental benefits of using this technology.

What safety considerations are important when operating this module?

Proper electrical safety, including grounding and isolation procedures, is paramount. Follow lockout/tagout for maintenance and ensure all safety guards are in place.

Personnel should be trained on the specific hazards associated with high-voltage industrial drive systems and emergency shutdown procedures. Refer to the operating manual for detailed safety instructions.

Overload and overvoltage protection are built-in, but environmental factors like extreme temperatures or dust can impact safety and performance. Ensure the operating environment meets specifications.

How is the SIEMENS 6SL3731-7KE37-5RE0 commissioned?

Commissioning typically involves using Siemens' STARTER engineering software to configure motor parameters, control modes, and safety functions. Proper wiring and initial power-up checks are essential.

The process includes setting up communication links to the PLC and any supervisory control systems. Performance tuning and system testing are critical steps before full deployment.

Refer to the official Siemens documentation and commissioning guides for detailed, step-by-step instructions specific to your application and system configuration.

What is the typical harmonic distortion of this module?

With a line reactor, the typical total harmonic distortion (THDi) is less than 5%. Using an Active Front End (AFE) configuration can reduce THDi to below 3%.

This low harmonic distortion is a significant advantage, as it minimizes interference with other electrical equipment on the same power grid. It helps meet grid code requirements.

Achieving these low levels of harmonic distortion ensures cleaner power operation and can prevent issues related to harmonics, such as overheating of transformers and motors.

What are the expansion capabilities of the SINAMICS S120 system?

The SINAMICS S120 system is highly modular, allowing for the addition of more drive units and modules to increase power or functionality. This supports system growth without requiring a complete replacement.

It can be integrated with other Siemens products like SIMATIC PLCs and HMIs, enabling comprehensive automation solutions that can be expanded over time. This connectivity enhances scalability.

The platform is designed to accommodate future technological advancements and integration with digital industrial solutions, ensuring long-term relevance and value.