SIEMENS 6SL3735-1TE37-4LA3 SINAMICS S120 Basic Line Connection Module 360kW 740A Liquid Cooled IP21 400V Range

The SIEMENS 6SL3735-1 Please note that I can only respond in English.

The SIEMENS 6SL3735-1TE37-4LA3 SINAMICS S120 Basic Line Connection Module is a high-performance liquid-cooled power component designed for demanding industrial applications requiring robust motor control. This module excels in delivering efficient power conversion with a rated power of 360kW, a continuous current capability of 740A, and operates within a 400V voltage range. Its IP21 protection rating ensures resilience against environmental factors, making it suitable for challenging manufacturing and processing environments. The SINAMICS S120 platform offers advanced control features and seamless integration, positioning this connection module as a critical element in modern automation systems.

Product Specifications

| Parameter                 | Value                                  |

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

| Product Number            | 6SL3735-1TE37-4LA3                     |

| Product Family            | SINAMICS S120                          |

| Module Type               | Basic Line Connection Module           |

| Rated Power               | 360 kW                                 |

| Continuous Current        | 740 A                                  |

| Cooling                   | Liquid Cooled                          |

| Protection Class          | IP21                                   |

| Voltage Range             | 400 V                                  |

| Depth                     | 295 mm                                 |

| Height                    | 770 mm                                 |

| Width                     | 300 mm                                 |

| Net Weight                | 61.0 kg                                |

| Ambient Temperature       | 0 – 45 °C                              |

| Maximum Ambient Temp.     | 50 °C (with derating)                  |

| EMC Filter                | Integrated                             |

| Control Interface         | c-module, D-module, E-module compatible |

Core Features & Market Positioning

The SIEMENS 6SL3735-1TE37-4LA3 stands out due to its liquid-cooling design, which allows for superior thermal management and higher power density compared to air-cooled counterparts. This feature is crucial for applications with continuous, high-load operation, enabling the module to maintain optimal performance and extended lifespan. As part of the SINAMICS S120 family, it benefits from Siemens' established reputation for reliability and advanced drive technology, positioning it as a premium solution for sophisticated automation tasks. The integrated EMC filter further simplifies installation by reducing electromagnetic interference, a common concern in industrial settings.

Key Application Scenarios

This robust connection module finds its primary utility in high-power motor control applications across various industries. It is exceptionally well-suited for machinery requiring precise and dynamic speed and torque control, such as large industrial fans, pumps, compressors, and extruders in the chemical and plastics industries. Furthermore, its capabilities are essential in material handling systems, printing machinery, and high-performance machine tools where consistent power delivery and operational efficiency are paramount. The liquid cooling also makes it ideal for enclosed cabinets or environments where heat dissipation is a significant challenge, ensuring sustained operation.

Practical System Integration Guidance

Integrating the SIEMENS 6SL3735-1TE37-4LA3 into existing or new SINAMICS S120 systems is streamlined due to its modular design and compatibility with various control modules (c, D, E). Proper liquid cooling system setup is vital; this involves ensuring the correct coolant flow rate and temperature are maintained as per Siemens' specifications to prevent thermal throttling and ensure longevity. Electrical connections must adhere to the 400V range and the 740A current rating, utilizing appropriately sized conductors and protective devices. Commissioning typically involves parameterization via Siemens' TIA Portal or STARTER software, allowing for detailed configuration of motor data, control modes, and safety functions.

Operation and Risk Mitigation

Safe operation of the 6SL3735-1TE37-4LA3 requires strict adherence to electrical safety standards and the module's operating manual. The liquid cooling system introduces potential risks related to leaks; regular inspection of hoses, connections, and the coolant level is imperative to prevent damage to the module and surrounding equipment. Overcurrent or overheating can trigger fault codes; common issues include "F7802" (overtemperature) or "F7805" (overcurrent), which necessitate immediate system shutdown and diagnosis. Ensuring proper ventilation around the liquid cooling unit and correct parameter settings in the drive controller are critical for preventing such events.

Scalability & Long-Term Value

The SINAMICS S120 platform, including the 6SL3735-1TE37-4LA3, offers significant scalability and long-term value. Its modular architecture allows for easy expansion and adaptation to evolving production needs, supporting a wide range of motor sizes and drive configurations. Compatibility with Siemens' broader automation portfolio, including PLCs and HMI devices, facilitates integration into comprehensive industrial control systems and IIoT solutions. This future-proofing capability, combined with Siemens' commitment to product support and ongoing technological advancements, ensures the module remains a valuable asset for many years.

FAQs

1. What is the primary function of the SIEMENS 6SL3735-1TE37-4LA3?

This module acts as a crucial link in the SINAMICS S120 drive system, providing a stable power interface for high-power motors. It efficiently converts and conditions the incoming power supply for motor control.

It enables precise speed and torque regulation, vital for demanding industrial automation processes requiring dynamic performance. Its liquid cooling ensures sustained operation under heavy loads, preventing thermal issues.

This component is specifically engineered for 400V systems and offers a substantial 360kW power rating and 740A current capacity, making it suitable for heavy-duty applications.

2. How does the liquid cooling of this module benefit industrial applications?

Liquid cooling offers superior heat dissipation compared to air cooling, allowing for a more compact design and higher power density. This is essential for continuous, high-torque applications.

It enables the module to operate reliably in environments with higher ambient temperatures or in enclosed spaces where airflow is restricted, maintaining optimal performance.

Consistent thermal management provided by liquid cooling significantly extends the operational lifespan of the module and reduces the risk of thermal-related failures.

3. What are the key technical specifications to consider for this SINAMICS S120 module?

Consider the 360kW rated power and 740A continuous current, which dictate the motor size and load capacity it can handle. The 400V operating voltage is critical for system compatibility.

The IP21 protection rating indicates its suitability for environments with potential water ingress, while the liquid cooling system requires specific attention for installation and maintenance.

Dimensions (770mm H x 300mm W x 295mm D) and weight (61.0 kg) are important for cabinet planning and physical integration into the machine.

4. In which industries is the SIEMENS 6SL3735-1TE37-4LA3 commonly used?

It's frequently found in heavy manufacturing, such as plastics extrusion, metal forming, and large pump or fan applications requiring significant motor power.

The chemical and petrochemical sectors utilize it for controlling large compressors and mixers where precise process control is paramount.

High-performance machine tools and advanced material handling systems also benefit from its robust power delivery and dynamic response capabilities.

5. What are the advantages of the SINAMICS S120 platform for this connection module?

The SINAMICS S120 platform provides a highly scalable and flexible drive system architecture, allowing for easy integration of various control and power units. This facilitates future upgrades and system expansion.

It offers advanced control functions, including precise positioning and synchronized motion, supporting complex automation tasks and Industry 4.0 initiatives.

Siemens' robust engineering and extensive support network ensure high reliability and long-term availability, reducing total cost of ownership.

6. What are the basic steps for integrating this module into a SINAMICS S120 drive system?

First, ensure the liquid cooling system is correctly installed and operational, maintaining the specified coolant flow and temperature. Then, connect the power supply and motor cables according to the 400V and 740A ratings, using appropriate safety measures.

Next, interface the module with the chosen control unit (c, D, or E-module) and connect it to the higher-level control system (e.g., PLC). This ensures proper communication and command reception.

Finally, parameterize the drive using Siemens' TIA Portal or STARTER software, configuring motor data, control loops, and safety functions before commissioning and testing.

7. What safety considerations are essential when operating this liquid-cooled module?

Always follow the operating manual and relevant electrical safety standards for high-voltage equipment. Ensure proper grounding and emergency stop functionality are implemented.

Regularly inspect the liquid cooling circuit for leaks, corrosion, or damage to hoses and connections. Maintain the correct coolant type and concentration as specified by Siemens.

Understand potential fault codes (e.g., overtemperature, overcurrent) and have established procedures for safe shutdown and troubleshooting to mitigate risks.

8. How does the integrated EMC filter simplify installation?

The built-in EMC filter reduces radiated and conducted electromagnetic interference, which can disrupt other sensitive electronic equipment in the vicinity. This often eliminates the need for external filter components, saving space and cost.

By suppressing electrical noise, it helps systems comply with electromagnetic compatibility standards, preventing communication errors and ensuring stable operation of connected devices.

This integrated solution streamlines the wiring and physical layout of the control cabinet, leading to a cleaner and more efficient installation process.

9. What is the typical lifespan of the SIEMENS 6SL3735-1TE37-4LA3?

With proper installation, operation within specified parameters, and regular maintenance of the liquid cooling system, the module is designed for a long operational life, often exceeding 10-15 years.

The robust construction and high-quality components used by Siemens contribute to its durability. However, extreme conditions or deviations from operating guidelines can shorten its lifespan.

Regular checks of the cooling circuit, electrical connections, and software updates as recommended by Siemens will help maximize its service life and ensure reliable performance over time.

10. Can this module be used with motors other than those designed for the SINAMICS S120 platform?

Yes, the module can control a wide range of AC asynchronous and synchronous motors, provided their power and voltage ratings are compatible with the module's specifications (360kW, 400V). Proper motor data must be entered during configuration.

The SINAMICS S120 system is designed for flexibility, allowing integration of various motor types. However, for optimal performance and to utilize advanced features like field-oriented control, using motors specifically recommended or tested by Siemens is advisable.

When connecting non-Siemens motors, careful attention must be paid to motor parameters, encoder feedback, and thermal protection settings within the drive controller to ensure safe and efficient operation.