SIEMENS 6SL3735-1TG37-3LA3 SINAMICS S120 Basic Line Connection Module 630kW 730A Liquid Cooled Power Stage 690V

The SIEMENS 6SL3735-1TG37-3LA3 SINAMICS S120 Basic Line Connection Module is a robust, liquid-cooled power stage engineered for high-performance industrial applications. This module offers a substantial power output of 630kW and a continuous current rating of 730A, operating at a nominal voltage of 690V. Its advanced liquid cooling system ensures superior thermal management, enabling consistent operation under demanding conditions and extending component lifespan. Designed for seamless integration into sophisticated drive systems, the SINAMICS S120 platform provides exceptional control precision, energy efficiency, and operational reliability, positioning it as a premier choice for critical industrial processes.

Product Specifications

| Feature                      | Specification                                   |

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

| Product Number               | 6SL3735-1TG37-3LA3                              |

| Series                       | SINAMICS S120 Basic Line Connection Module      |

| Power Output                 | 630 kW                                          |

| Continuous Current           | 730 A                                           |

| Nominal Voltage              | 690 V                                           |

| Cooling Method               | Liquid Cooled                                   |

| Type                         | Power Stage                                     |

Core Features & Market Positioning

The SIEMENS 6SL3735-1TG37-3LA3 stands out due to its high power density and advanced liquid cooling technology, crucial for applications generating significant heat. This liquid-cooled design offers superior thermal performance compared to air-cooled counterparts, allowing for smaller footprints and quieter operation in demanding industrial environments. Its integration within the SINAMICS S120 family ensures compatibility with a wide range of Siemens automation solutions, providing a cohesive and powerful drive system. This positioning targets industries requiring maximum performance, reliability, and energy efficiency, such as heavy manufacturing, material handling, and advanced process control.

Key Application Scenarios

This high-capacity power stage is ideally suited for demanding industrial applications including high-power motor control in rolling mills, large fan and pump drives in power plants or water treatment facilities, and complex material handling systems. Its robust design and liquid cooling make it an excellent choice for continuous operation in harsh environments where thermal management is paramount. Furthermore, its compatibility with the SINAMICS S120 platform allows for sophisticated motion control tasks in machine building and specialized automation.

Practical System Integration Guidance

Integrating the SIEMENS 6SL3735-1TG37-3LA3 typically involves connecting it to a compatible line infeed and motor unit within the SINAMICS S120 chassis. The liquid cooling system requires a dedicated circuit with appropriate coolant flow and temperature monitoring. Proper grounding and shielding are essential to mitigate electromagnetic interference (EMI) in industrial settings. Commissioning involves parameterization via Siemens TIA Portal or STARTER software, where motor data, control modes, and safety functions are configured. Careful attention to the voltage and current ratings of all connected components is critical for safe and reliable operation.

Operation and Risk Mitigation

Safe operation of the SINAMICS S120 power stage mandates strict adherence to the manufacturer's installation and operating manuals. Key safety considerations include ensuring proper isolation before maintenance, verifying coolant levels and flow rates, and implementing robust emergency stop procedures. Common operational issues can stem from incorrect parameterization, inadequate cooling, or electrical disturbances. The drive system provides extensive diagnostic capabilities and fault codes to aid in troubleshooting. Critical fault codes, such as those related to overtemperature, overcurrent, or supply voltage deviations, should be addressed immediately by qualified personnel to prevent equipment damage.

Scalability & Long-Term Value

The SINAMICS S120 platform, including the 6SL3735-1TG37-3LA3 module, is designed for scalability. Its modular architecture allows for the expansion of drive capacity by adding more power stages or integrating advanced control units. Compatibility with Siemens' broader automation ecosystem, including SIMATIC PLCs and IIoT platforms, facilitates integration into smart manufacturing environments and Industry 4.0 initiatives. This ensures long-term value through system upgradeability, enhanced data analytics capabilities, and adaptability to evolving industrial automation demands.

Frequently Asked Questions

What is the primary advantage of liquid cooling for the SIEMENS 6SL3735-1TG37-3LA3?

Liquid cooling offers superior heat dissipation compared to air cooling. This allows for higher power density and more compact drive solutions. It also leads to quieter operation and more consistent performance under heavy loads.

The liquid cooling system ensures optimal thermal management for the power stage. This is critical for maintaining component integrity and extending the operational lifespan. It prevents thermal throttling and ensures reliable performance even in demanding industrial environments.

This advanced cooling capability makes the 6SL3735-1TG37-3LA3 ideal for applications requiring continuous high output. It is particularly well-suited for environments where ambient temperatures are high or space is limited.

How does the SIEMENS 6SL3735-1TG37-3LA3 integrate with other SINAMICS S120 components?

This module is designed as a power stage within the SINAMICS S120 system. It connects to a line infeed and motor operator. The system uses a common DC bus for power distribution.

Integration is managed through the SINAMICS S120 chassis system. Various control units and interface modules can be combined. This allows for flexible configuration tailored to specific application needs.

Configuration and parameterization are performed using Siemens engineering software. This includes TIA Portal or STARTER, ensuring seamless setup and operation with other S120 drives and automation components.

What are common troubleshooting steps for fault codes on this module?

When a fault code appears, consult the SINAMICS S120 system manual. Identify the specific code and its associated cause. Ensure the power supply and motor connections are secure and correct.

Verify the cooling system is functioning properly. Check coolant levels, flow rates, and temperature sensors. Ensure ambient conditions do not exceed operational limits for the drive and surrounding equipment.

Perform a soft start after addressing the fault. If the issue persists, a qualified Siemens service technician may be required. Always follow safety procedures during troubleshooting.