SIEMENS 6SL3735-7TE38-4LA3 SINAMICS S120 Active Line Connection Module 500kW 840A Regulated Liquid Cooled Supply 400V

Product Specifications

| Feature                 | Specification                                                              |

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

| Product Number          | 6SL3735-7TE38-4LA3                                                         |

| Product Family          | SINAMICS S120 Cabinet Module Active Line Connection Module                 |

| Input Voltage           | 380-480V 3AC, 50/60 Hz                                                     |

| Input Current (Rated)   | 840A                                                                       |

| Output DC Voltage       | 510-720V DC                                                                |

| Rated Power             | 500kW                                                                      |

| Cooling                 | Liquid Cooled                                                              |

| Enclosure               | Cabinet Unit IP21                                                          |

| Weight                  | 1250kg                                                          |

| Commodity Code          | 85044086                                                  |

Core Features & Market Positioning

The SIEMENS 6SL3735-7TE38-4LA3 SINAMICS S120 Active Line Connection Module represents a high-performance solution for demanding industrial applications. Its advanced active line connection technology ensures a stabilized DC link voltage, independent of fluctuations in the mains supply, providing consistent power to connected motor modules. This inherent stability significantly enhances operational reliability and process precision. Unlike basic or smart line modules, the Active Line Module actively generates a stabilized DC voltage, ensuring that connected motor modules are decoupled from line voltage variations within permissible tolerances. Furthermore, its ability to draw a virtually sinusoidal current from the supply system minimizes harmful current harmonics, contributing to a cleaner power grid and improved electromagnetic compatibility (EMC). The liquid-cooled design optimizes thermal management, making it exceptionally well-suited for applications with restricted installation space or challenging environmental conditions where efficient heat dissipation is critical. This positions the 6SL3735-7TE38-4LA3 as a premium choice for industries prioritizing robust performance, energy efficiency, and advanced power quality.

Key Application Scenarios

The SIEMENS 6SL3735-7TE38-4LA3 SINAMICS S120 Active Line Connection Module is engineered for high-dynamic drive requirements and applications involving frequent braking cycles with significant regenerative energy feedback. It excels in heavy-duty industrial settings such as manufacturing plants, automated production lines, and complex machinery where precise motor control and reliable power delivery are paramount. Its robust design and advanced capabilities make it ideal for sectors including automotive manufacturing, material handling, and heavy industry, where continuous operation and high throughput are essential. The module's ability to regenerate energy back into the supply system enhances overall energy efficiency in these demanding environments. This unit is particularly valuable for applications where consistent voltage is critical, such as in precision machining or complex robotic systems, ensuring optimal performance even under fluctuating grid conditions.

Practical System Integration Guidance

Integrating the SIEMENS 6SL3735-7TE38-4LA3 into a SINAMICS S120 system is facilitated by its design, which typically includes an Active Interface Module. This combined unit often contains the necessary Clean Power Filter and pre-charging circuit, simplifying wiring and installation. Communication between the Active Line Module and the control unit, such as the CU320-2, is established via DRIVE-CLiQ connections, a standardized digital interface within the Siemens ecosystem. Commissioning and operation should only be performed by qualified personnel who are familiar with the safety practices and standards applicable to such equipment. Careful observation of installation, storage, and transport conditions is crucial to prevent damage and ensure reliable operation, with particular attention to managing potential condensation in liquid-cooled systems after shutdown.

Operation and Risk Mitigation

Safe and effective operation of the SIEMENS 6SL3735-7TE38-4LA3 requires adherence to stringent safety protocols. Commissioning and maintenance must be carried out by qualified personnel aware of potential hazards. The system must be operated in conjunction with the provided documentation, observing all safety instructions and warning notices, which are graded by the degree of danger (DANGER, WARNING, CAUTION). Proper grounding of personnel, workplaces, and equipment is essential when handling electronic components due to their sensitivity to electrostatic discharge (ESD). For liquid-cooled units, ensuring sufficient delay time for the cooling system after converter shutdown is vital to prevent component condensation and ensure longevity. In cases where drives require controlled deceleration after a power failure and energy cannot be recovered, appropriate braking modules and resistors must be utilized.

Scalability & Long-Term Value

The SIEMENS 6SL3735-7TE38-4LA3 SINAMICS S120 Active Line Connection Module is part of a scalable drive system. Active Line Modules can be operated in parallel on a common Line Connection Module to increase the overall power rating, allowing for system expansion as demands grow. This modularity ensures that the investment in the SINAMICS S120 platform can adapt to evolving production needs. Furthermore, the integration within the SINAMICS S120 ecosystem ensures compatibility with other Siemens drive components and control units, facilitating a cohesive and upgradeable automation solution. Its advanced features, such as active line regeneration and stable DC link voltage, contribute to long-term operational efficiency and reduced energy consumption, providing sustained value.

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Frequently Asked Questions (FAQs)

Q1: What is the primary function of the SIEMENS 6SL3735-7TE38-4LA3?

The SIEMENS 6SL3735-7TE38-4LA3 is an Active Line Connection Module for the SINAMICS S120 drive system. Its main role is to provide a stable DC link voltage to connected motor modules. It actively draws power from the grid and can also feed regenerative energy back into the supply system.

This module ensures that the connected motor modules are not affected by fluctuations in the mains voltage, leading to more reliable and precise motor control. It is a key component for high-performance drive applications requiring consistent power delivery.

The active line connection technology also contributes to a cleaner power grid by drawing a nearly sinusoidal current and minimizing harmonics. This enhances overall system efficiency and reduces potential interference.

Q2: What are the key technical specifications of the 6SL3735-7TE38-4LA3?

This module operates with an input voltage of 380-480V 3-phase AC at 50/60 Hz. It has a rated input current of 840A. The output DC voltage ranges from 510V to 720V DC.

The unit boasts a significant rated power of 500kW. It features liquid cooling for efficient thermal management and is housed in a cabinet unit with an IP21 enclosure rating. Its weight is approximately 1250kg.

Key technical parameters include its ability to stabilize DC link voltage, draw sinusoidal current, and support regenerative feedback, making it suitable for demanding industrial applications.

Q3: What types of applications is the SIEMENS 6SL3735-7TE38-4LA3 best suited for?

This Active Line Connection Module is ideal for applications requiring high dynamic performance and frequent braking cycles. It's well-suited for heavy-duty industrial settings like automated manufacturing, material handling, and process industries.

Its capability for regenerative energy feedback makes it highly efficient for applications where drives frequently decelerate and generate energy, allowing this energy to be returned to the grid. This reduces overall energy consumption.

The stable DC link voltage it provides is crucial for applications demanding high precision, such as in complex machine tools, robotics, and assembly lines where consistent power is essential for accuracy.

Q4: How does the liquid cooling feature benefit this module?

Liquid cooling offers superior thermal management compared to air cooling, especially in high-power density applications. It allows for more efficient dissipation of heat generated during operation.

This feature makes the 6SL3735-7TE38-4LA3 ideal for installations with limited space where effective heat removal is critical. It also improves reliability and extends the lifespan of the module in challenging environmental conditions.

The efficient cooling ensures the module can operate at its full capacity for extended periods without overheating, crucial for continuous industrial processes.

Q5: What is the role of the Active Interface Module in conjunction with the 6SL3735-7TE38-4LA3?

The Active Interface Module typically comes integrated with the Active Line Connection Module. It houses essential components like the Clean Power Filter and the pre-charging circuit for the DC link.

This integration simplifies system setup by providing a pre-wired solution, reducing the need for extensive external cabling and configuration. It ensures that necessary protective filtering and power-up sequences are correctly managed.

The Active Interface Module plays a critical role in meeting EMC requirements and managing the initial charging of the DC bus, contributing to the overall safety and performance of the drive system.

Q6: Can the SIEMENS 6SL3735-7TE38-4LA3 be used in parallel to increase power output?

Yes, the SINAMICS S120 Active Line Modules are designed for parallel operation. Multiple Active Line Modules can be connected to a common Line Connection Module to achieve higher power ratings.

This parallel configuration allows for a scalable solution, enabling users to expand their drive system's capacity as their application requirements evolve. It provides flexibility in system design.

This capability makes the 6SL3735-7TE38-4LA3 a strong choice for very large or growing industrial applications that demand significant power.

Q7: What are the safety considerations when installing and operating this module?

Installation and operation must be performed by qualified personnel who understand industrial electrical safety standards. It's crucial to follow all documentation, warnings, and safety instructions provided by Siemens.

Proper grounding of personnel, equipment, and the installation site is essential due to the sensitivity of electronic components to electrostatic discharge (ESD). Always observe proper handling procedures for sensitive electronic parts.

For liquid-cooled units, ensuring the cooling system has an adequate delay after shutdown is important to prevent condensation, which could damage components. Always ensure the unit is de-energized before performing any maintenance.

Q8: Does this module support regenerative feedback?

Yes, the SIEMENS 6SL3735-7TE38-4LA3, as an Active Line Module, is designed to feed regenerative energy back into the supply system. This occurs when the connected motors operate as generators, for instance, during deceleration.

This regenerative capability contributes to energy efficiency by recycling energy that would otherwise be dissipated as heat in braking resistors. It's a key feature for applications with frequent braking or overhauling loads.

The ability to return energy to the grid also helps in stabilizing the overall power system and can reduce operational costs in energy-intensive industries.

Q9: What is the significance of drawing a "virtually sinusoidal current"?

Drawing a virtually sinusoidal current from the supply grid means the module causes minimal distortion to the power waveform. This significantly reduces harmonic pollution in the electrical network.

Low harmonic distortion leads to a cleaner power supply for all connected equipment, reducing the risk of overheating in transformers and cables, and improving the performance of other sensitive electronics.

This feature also helps in meeting stringent electromagnetic compatibility (EMC) standards, crucial in industrial environments where multiple electronic devices operate in close proximity.

Q10: What are the typical warranty and support options for this product?

While specific warranty terms can vary by distributor, Siemens typically offers warranties on its industrial products. Distributors often provide additional warranty periods, such as 3 years from Automation-Warehouse.com.

Support for the SINAMICS S120 system, including the 6SL3735-7TE38-4LA3, is available through Siemens' extensive industry support network and authorized distributors. Documentation, including manuals and technical data sheets, is crucial for operation and troubleshooting.

It's important to consult the specific seller or distributor for detailed information regarding warranty coverage, return policies, and available technical support services.