SIEMENS 6SL3735-1TG34-2LA3 SINAMICS S120 Basic Line Connection Module 355kW 420A Liquid Cooled for 690V Line IP21

The SIEMENS 6SL3735-1TG34-2LA3 SINAMICS S120 Basic Line Connection Module stands as a pivotal component for high-performance industrial drive systems, offering robust power handling and advanced control capabilities. This liquid-cooled unit is engineered for demanding applications, providing a continuous power output of 355kW and a current rating of 420A. Its design prioritizes efficiency and reliability in 690V systems, featuring an IP21 enclosure for essential environmental protection. The SINAMICS S120 platform is renowned for its flexibility and integration potential, making this connection module a cornerstone for modern automation solutions. Key advantages include its superior thermal management due to liquid cooling, ensuring sustained performance under heavy loads and extending operational life. Furthermore, its seamless integration within the SINAMICS S120 ecosystem facilitates sophisticated drive configurations and advanced functionalities.

Product Specifications

| Feature                | Specification                                     |

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

| Product Type           | SINAMICS S120 Basic Line Connection Module        |

| Model Number           | 6SL3735-1TG34-2LA3                                |

| Rated Power            | 355 kW                                            |

| Rated Current          | 420 A                                             |

| Cooling                | Liquid Cooled                                     |

| Voltage Range          | 690 V                                             |

| Ingress Protection     | IP21                                              |

| System                 | SINAMICS S120                                     |

Core Features & Market Positioning

The SIEMENS 6SL3735-1TG34-2LA3 distinguishes itself through its robust liquid-cooling system, a critical feature for maintaining optimal operating temperatures and ensuring consistent performance in high-density power applications. This advanced thermal management significantly reduces the risk of overheating, a common bottleneck in conventional air-cooled systems, thereby enhancing reliability and extending the service life of the module. Its positioning within the SINAMICS S120 family underscores its compatibility with a broad spectrum of Siemens automation products, offering a unified and integrated approach to drive control. The module's high current and power ratings make it suitable for heavy-duty industrial machinery, setting it apart as a premium solution for demanding operational environments where performance and longevity are paramount.

Key Application Scenarios

This high-capacity connection module is ideally suited for deployment in sectors requiring substantial and precisely controlled motor power, such as heavy manufacturing, material handling, and large-scale process industries. Applications like high-speed conveyor systems, large pumps, fans, and complex machine tools can leverage the 355kW, 420A liquid-cooled capabilities for sustained, efficient operation. Its robust design and 690V voltage compatibility make it a strong contender for applications in mining, oil and gas, and chemical processing plants where extreme conditions and stringent uptime requirements are the norm. The IP21 rating offers adequate protection for controlled industrial environments, allowing for reliable integration into diverse plant layouts.

Practical System Integration Guidance

Integrating the SIEMENS 6SL3735-1TG34-2LA3 into an existing SINAMICS S120 system involves careful consideration of the liquid cooling circuit. Proper connection to a suitable cooling unit is essential, ensuring adequate flow rates and maintaining the coolant within specified temperature ranges to prevent thermal overload. Electrical connections should adhere strictly to the voltage and current ratings, utilizing appropriate cable types and termination methods to ensure safety and signal integrity. For advanced control, the module interfaces seamlessly with SINAMICS S120 Control Units, allowing for sophisticated motion control profiles, safety functions, and communication via industrial Ethernet protocols like PROFINET.

Operation and Risk Mitigation

Safe operation of the SIEMENS 6SL3735-1TG34-2LA3 necessitates adherence to all safety guidelines specified in the Siemens documentation. Regular monitoring of coolant temperature and flow is paramount to prevent system derating or shutdown due to thermal stress. The module's diagnostic capabilities provide real-time status information, allowing for proactive maintenance. Common fault codes relate to over-temperature conditions, insufficient coolant flow, or electrical disturbances; prompt investigation and corrective action are crucial. Ensuring proper grounding and isolation is vital to mitigate electrical hazards.

Scalability & Long-Term Value

The SINAMICS S120 platform, including the 6SL3735-1TG34-2LA3 module, offers significant scalability. Its modular design allows for expansion and reconfiguration of drive systems to meet evolving production demands. Compatibility with a wide range of Siemens automation components and the integration of digital solutions for IIoT environments enhance its long-term value. This ensures that investments in the SINAMICS S120 system can adapt to future technological advancements and plant expansions, providing a future-proof automation infrastructure.

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Frequently Asked Questions

What is the primary function of the SIEMENS 6SL3735-1TG34-2LA3?

This module acts as a crucial interface within the SINAMICS S120 drive system, managing the power flow to the motor. It provides the necessary power conditioning and control signals for high-power applications. Its core role is to deliver robust and stable power to demanding industrial machinery.

It is specifically designed as a basic line connection module, implying its integration at the line supply side of a larger drive system. The 355kW and 420A ratings highlight its capability to handle significant power demands efficiently. This ensures that even the most power-intensive applications receive consistent and reliable energy.

The liquid-cooled design is a key differentiator, enabling sustained high-performance operation under heavy loads and in challenging thermal environments. This feature is critical for preventing thermal runaway and extending the operational lifespan of the equipment.

How does the liquid cooling benefit this connection module?

Liquid cooling provides superior heat dissipation compared to traditional air cooling methods. This allows the module to operate at higher power densities and maintain optimal performance even under continuous heavy duty cycles. Reduced operating temperatures directly translate to increased reliability and a longer service life for the component.

This advanced thermal management system is essential for preventing thermal shutdowns, which can disrupt production and lead to costly downtime. By effectively removing heat, the module can sustain its rated performance without degradation. This makes it ideal for critical applications where uninterrupted operation is paramount.

The liquid cooling system also contributes to quieter operation and a more compact overall system design, as it reduces the need for large, noisy fans and extensive ventilation. This offers significant advantages in plant layout and working environment acoustics.

What are the key technical specifications for the SIEMENS 6SL3735-1TG34-2LA3?

The module is rated for a continuous power output of 355kW and a current carrying capacity of 420A. It operates within a 690V line voltage system, catering to high-power industrial needs. Its liquid-cooled design ensures efficient thermal management for demanding applications.

The unit features an IP21 enclosure, providing basic protection against solid objects larger than 12.5 mm and vertically falling water drops. This rating is suitable for controlled industrial environments where it is not exposed to direct liquid ingress.

As part of the SINAMICS S120 family, it offers seamless integration with other Siemens drive components, supporting advanced control and communication functionalities. This ensures compatibility and facilitates comprehensive system solutions.

What types of industrial applications are best suited for this module?

This connection module is exceptionally well-suited for heavy industrial applications requiring substantial motor power and precise control. This includes large pumps, fans, extruders, and heavy-duty material handling systems found in manufacturing, mining, and processing industries. Its high power and current ratings make it ideal for driving large machinery.

The 690V capability and robust construction are particularly advantageous in sectors like oil and gas, chemical processing, and pulp and paper, where demanding operating conditions and high-power requirements are common. Its reliability under stress is a key selling point for these environments.

It is also a strong choice for complex machine tools and printing presses that demand high torque and speed control. The SINAMICS S120 platform's advanced control features, facilitated by this module, allow for intricate motion profiles and enhanced productivity in such sophisticated machinery.

How is the liquid cooling system typically integrated and maintained?

Integration involves connecting the module to a dedicated liquid cooling unit (LCU) via specified coolant lines. Proper routing, fluid type, and flow rate maintenance are critical for optimal heat exchange. The system typically includes pumps, reservoirs, and heat exchangers.

Regular maintenance of the liquid cooling system is essential. This includes periodic checks of coolant levels and quality, filter replacement, and verification of pump operation. Monitoring the coolant temperature and pressure through the drive's diagnostics is crucial for proactive issue detection.

Siemens provides detailed documentation outlining the specific requirements for the cooling circuit, including recommended coolant types and operating temperatures. Adhering to these guidelines and performing routine inspections will ensure the longevity and reliable performance of the liquid-cooled SINAMICS S120 module.

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

Strict adherence to electrical safety standards and Siemens' installation guidelines is paramount. Proper grounding, isolation procedures, and lockout/tagout protocols must be followed during installation and maintenance. Ensure all personnel are qualified and aware of the high voltages involved.

Operating personnel should be trained on the specific functions and potential hazards associated with the SINAMICS S120 system. Regular checks of the liquid cooling system's integrity are crucial to prevent leaks that could compromise electrical safety. Emergency stop functions and other safety features must be verified regularly.

Environmental factors also play a role in safety. The IP21 rating means the module should be installed in a clean, dry environment to prevent potential short circuits or corrosion. Avoid areas with excessive moisture or conductive dust.

How does the SINAMICS S120 architecture allow for scalability with this module?

The SINAMICS S120 platform is inherently modular, allowing users to expand drive configurations by adding more modules or control units as production needs increase. This specific connection module can be integrated into larger multi-axis systems or parallel configurations.

This scalability extends to software and control functions. The system can be upgraded with advanced firmware, additional safety integrated functions, or enhanced motion control capabilities. This ensures the drive system can adapt to evolving automation requirements and technological advancements.

Compatibility with Siemens' wider automation ecosystem, including PLCs like SIMATIC and HMI panels, further enhances scalability. This allows for seamless integration into comprehensive plant-wide automation solutions, facilitating future expansions and upgrades without major overhauls.

What communication protocols are supported for integrating this module into a network?

The SIEMENS 6SL3735-1TG34-2LA3, as part of the SINAMICS S120 family, typically supports industrial Ethernet protocols for network integration. PROFINET is a primary protocol, offering high-speed, real-time communication for sophisticated automation tasks.

Other industrial fieldbuses may also be supported, depending on the specific control unit paired with the connection module. This can include protocols like PROFIBUS DP, allowing for flexible integration into existing automation architectures. The choice of protocol impacts data exchange speed and complexity.

The module facilitates the exchange of diagnostic data, status information, and control commands, enabling centralized monitoring and control within a plant-wide network. This interoperability is key for implementing Industry 4.0 concepts and smart manufacturing solutions.

What are common troubleshooting steps for issues related to this module?

Begin by checking the drive's diagnostic buffer for specific fault codes and error messages. These codes often pinpoint the root cause, such as thermal overload, insufficient coolant flow, or power supply irregularities. Consult the SINAMICS S120 manual for detailed explanations of each code.

Verify the status of the liquid cooling system, ensuring proper coolant levels, flow rates, and temperatures. Inspect electrical connections for tightness and signs of damage. Check power supply voltages and frequencies against the module's specifications.

If the issue persists, consider performing a system reset or firmware update after backing up relevant parameters. If external factors are suspected, such as power quality issues, investigate the upstream electrical supply. Always ensure qualified personnel perform troubleshooting.

How does the IP21 rating impact where this module can be installed?

The IP21 rating signifies protection against solid objects greater than 12.5 mm and vertically dripping water. This means the module can be installed in environments where accidental contact with large objects is unlikely and where there is no risk of water spraying or dripping onto the unit.

It is suitable for general-purpose industrial locations that are clean and dry, such as control cabinets or designated machine enclosures. The enclosure offers some protection but is not designed for wash-down applications or environments with high humidity or condensation.

Therefore, avoid installing the module in areas exposed to direct water jets, heavy condensation, or corrosive atmospheres. Proper placement within a protected enclosure is key to ensuring the longevity and reliable operation of the SIEMENS 6SL3735-1TG34-2LA3.