SIEMENS 6SL3731-7TE41-4RE0 SINAMICS S120 Cabinet Modules 2 Active Line Module 900kW 1405A Right Side Mount Air Cooled
The SIEMENS 6SL3731-78E41-4RE0 SINAMICS S120 Cabinet Module stands as a robust solution for demanding industrial applications, offering unparalleled power and control. This air-cooled, right-side mount Active Line Module boasts a formidable 900kW power rating and a 1405A current capacity, ensuring exceptional performance in high-torque, dynamic motor drives. Its advanced design prioritizes efficiency, reliability, and seamless integration into complex automation systems, making it a cornerstone for modern manufacturing and process industries. Key advantages include its sophisticated control algorithms, superior energy regeneration capabilities, and robust construction designed for harsh industrial environments.
Product Specifications
| Feature | Specification |
| :---------------------------- | :---------------------------------------------- |
| Product Number | 6SL3731-78E41-4RE0 |
| Product Family | SINAMICS S120 Cabinet Modules |
| Type | Active Line Module |
| Rated Power | 900 kW |
| Rated Current | 1405 A |
| Cooling Method | Air Cooled |
| Mounting | Right Side Mount |
| Voltage Range | Typically 400-480V AC (check specific variant) |
| Control Type | Vector Control, Servo Control |
| Protection Class | IP20 (or as specified for cabinet integration) |
| Dimensions (H x W x D) | Varies based on cabinet configuration |
| Weight | Varies based on cabinet configuration |
Core Features & Market Positioning
The SIEMENS 6SL3731-78E41-4RE0 distinguishes itself through its intelligent Active Line Module technology, which actively feeds regenerated energy back into the power grid, significantly enhancing energy efficiency and reducing operational costs. This contrasts with passive line filters, offering a superior power factor and cleaner harmonic distortion. Its positioning in the market is defined by its suitability for high-performance applications demanding precise motor control and high power density, such as in heavy industry, rolling mills, and complex material handling systems. The SINAMICS S120 platform's inherent flexibility and scalability further cement its competitive edge, allowing for tailored solutions across a wide spectrum of drive requirements.
Key Application Scenarios
This high-capacity SINAMICS S120 Active Line Module is ideally suited for applications requiring substantial motor power and precise speed or position control. Common industrial sectors benefiting from its capabilities include metals processing, where it drives large rolling mill stands and coiler drives; the chemical and petrochemical industries, powering large pumps and compressors; and advanced manufacturing, controlling high-speed cranes, extruders, and complex material handling equipment. Its ability to handle dynamic load changes and provide robust performance makes it a critical component in applications where uptime and efficiency are paramount.
Practical System Integration Guidance
Integrating the SIEMENS 6SL3731-78E41-4RE0 into a SINAMICS S120 cabinet system involves careful planning for power distribution, cooling, and control network connectivity. Proper ventilation within the cabinet is essential due to its air-cooled nature; ensuring adequate airflow around the module prevents thermal derating and ensures longevity. Connection to the main power supply requires adherence to local electrical codes and Siemens' specific installation guidelines, typically involving busbars for power connections and appropriate grounding. For control, the module interfaces with Siemens' control units (e.g., CU320-2) via PROFIBUS or PROFINET, enabling advanced diagnostics and parameterization through software like STARTER.
Operation and Risk Mitigation
Operating the SINAMICS S120 Cabinet Module, including the 6SL3731-78E41-4RE0, demands adherence to safety protocols. Before commissioning, ensure all safety guards are in place and emergency stop circuits are functional. Common operational risks involve incorrect parameterization leading to motor instability or overcurrent faults. Monitoring internal module temperatures and ensuring the cooling fans are operational is crucial to prevent overheating. Key fault codes, such as F0001 (Overcurrent) or F0011 (Over temperature), typically indicate issues with motor load, cabling, or the cooling system and require immediate investigation by qualified personnel.
Scalability & Long-Term Value
The SINAMICS S120 platform, represented by the 6SL3731-78E41-4RE0, is designed for exceptional scalability and long-term value. Its modular architecture allows for easy expansion and reconfiguration, enabling upgrades to meet evolving production demands without a complete system overhaul. Compatibility with broader Siemens Industrial Automation ecosystems, including SIMATIC PLCs and IIoT-enabled solutions, ensures seamless integration into smart factory initiatives. This future-proofing aspect, combined with the module's robust design and Siemens' renowned reliability, provides a significant return on investment through reduced maintenance, extended operational life, and enhanced process optimization capabilities.
Frequently Asked Questions
What is the primary function of a SINAMICS S120 Active Line Module?
An Active Line Module actively regenerates energy back to the grid.
This improves power factor and reduces harmonic distortion.
It enhances overall system energy efficiency significantly.
How is the SIEMENS 6SL3731-78E41-4RE0 cooled, and what are the implications?
This module is air-cooled, requiring adequate ventilation.
Proper airflow prevents overheating and ensures optimal performance.
Insufficient cooling can lead to thermal derating or faults.
What kind of applications is this 900kW SINAMICS S120 module best suited for?
It's ideal for high-power, dynamic industrial drives.
Applications include rolling mills and large pump/compressor drives.
Heavy-duty material handling and extrusion processes also benefit.
Can this module regenerate energy, and where does it go?
Yes, it actively feeds regenerated energy back to the grid.
This captured energy can be reused by other loads.
It reduces overall energy consumption and operating costs.
What is the significance of the 1405A current rating?
This high current rating allows control of very large motors.
It indicates the module's capacity for sustained high-torque operation.
It is crucial for demanding applications like metal processing.
What communication protocols are typically used with this SINAMICS S120 module?
PROFIBUS and PROFINET are standard for Siemens drives.
These protocols enable high-speed data exchange and diagnostics.
Integration with SIMATIC PLCs is seamless using these networks.
How does the "Right Side Mount" configuration affect installation?
This specifies the module's physical orientation within a cabinet.
It dictates adjacent component placement for optimal fit.
Ensure cabinet layout plans accommodate this mounting type.
What are the key advantages of using an Active Line Module over a conventional one?
Active Line Modules offer better energy regeneration.
They provide a superior power factor and reduced grid impact.
This leads to substantial operational cost savings and efficiency gains.
What safety considerations are important during installation and operation?
Always follow Siemens' safety guidelines and local codes.
Ensure proper grounding and electrical isolation.
Verify emergency stop circuits are fully functional.
How scalable is the SINAMICS S120 platform with this module?
The S120 platform is highly modular and scalable.
It allows for future system expansion and upgrades.
Integration with IIoT and digital solutions is supported.
