SIEMENS 6SL3720-1TG31-8AA3 SINAMICS S120 Single Motor Module with CIM for CU320-2 160kW 175A Compact Frame 690V

The SIEMENS 6SL3720-1TG31-8AA3 SINAMICS S120 Single Motor Module with CIM for CU320-2 is a high-performance drive solution designed for demanding industrial applications. This 160kW, 175A compact frame module operates at 690V and offers advanced control capabilities, making it ideal for precise motion control and energy efficiency. Its integrated Communication Interface Module (CIM) ensures seamless integration with the CU320-2 control unit, facilitating complex automation tasks. The module's robust design and Siemens' renowned reliability provide a competitive edge in critical industrial processes.

Product Specifications

| Parameter               | Value                                   |

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

| Product Number          | 6SL3720-1TG31-8AA3                      |

| Product Family          | SINAMICS S120                           |

| Type                    | Single Motor Module with CIM            |

| Control Unit            | CU320-2                                 |

| Power Rating            | 160 kW                                  |

| Continuous Current      | 175 A                                   |

| Voltage                 | 690 V                                   |

| Frame Size              | Compact                                 |

| Protection Class        | IP20                                    |

| Dimensions (H x W x D)  | 490 mm x 220 mm x 264 mm (approx.)      |

| Weight                  | 17 kg (approx.)                         |

| Ambient Temperature     | -20°C to +45°C                          |

Core Features & Market Positioning

The SINAMICS S120 platform, to which this module belongs, is globally recognized for its advanced vector control and servo drive capabilities, setting it apart from standard inverter solutions. The 6SL3720-1TG31-8AA3 specifically benefits from the S120's ability to provide high-precision speed and position control, crucial for applications requiring dynamic response and accuracy. Its integration with the CU320-2 control unit further enhances its market position by enabling sophisticated automation functions and seamless connectivity within Siemens' TIA Portal environment. This positioning makes it a preferred choice for industries seeking high-efficiency, robust, and intelligent motor control.

Key Application Scenarios

This SIEMENS 6SL3720-1TG31-8AA3 SINAMICS S120 motor module is ideally suited for demanding applications across various industrial sectors. It excels in pump and fan control where precise flow or pressure regulation is paramount, contributing to significant energy savings. Its high dynamic performance and accuracy make it an excellent choice for machine tools, such as CNC machines, where precise positioning and rapid acceleration/deceleration are critical for manufacturing quality. Furthermore, its robust 690V operation is well-suited for heavy industries, including mining, material handling, and the chemical processing sector, where powerful and reliable motor drives are essential for continuous operation.

Practical System Integration Guidance

Integrating the SIEMENS 6SL3720-1TG31-8AA3 into a SINAMICS S120 system with a CU320-2 control unit is streamlined through Siemens' TIA Portal engineering framework. Proper wiring is critical, ensuring the correct connection of motor power cables, control signals, and communication interfaces. The CIM (Control Interface Module) on the motor module facilitates the communication link with the CU320-2, typically via a Control Unit interface. For commissioning, utilizing the TIA Portal's drive configuration tools allows for parameterization of motor data, control modes (e.g., V/f control, closed-loop vector control), and safety functions. Following Siemens' installation guidelines, including proper grounding and ventilation, is essential for optimal performance and longevity.

Operation and Risk Mitigation

Safe operation of the SIEMENS 6SL3720-1TG31-8AA3 is paramount and governed by adherence to the provided operating manual and relevant safety standards. Key operational parameters to monitor include motor temperature, current draw, and voltage levels to prevent overloads and potential damage. Risk mitigation involves implementing appropriate braking strategies to manage kinetic energy during deceleration, especially in high-inertia applications. Common fault codes relate to overcurrent, overvoltage, undervoltage, and thermal overload conditions. Addressing these typically involves verifying motor integrity, checking supply voltage stability, and ensuring adequate cooling. Regular preventive maintenance, such as inspecting connections and cleaning ventilation paths, further minimizes operational risks.

Scalability & Long-Term Value

The SINAMICS S120 platform, including the 6SL3720-1TG31-8AA3, offers significant scalability and long-term value, primarily through its compatibility within the Siemens automation ecosystem. This module can be integrated into larger S120 drives systems or combined with other Siemens components, such as PLCs from the SIMATIC S7 series, within the Totally Integrated Automation (TIA) Portal. This allows for easy expansion of automation capabilities and the implementation of advanced functionalities. Furthermore, its support for various industrial communication protocols facilitates integration with Industrial Internet of Things (IIoT) platforms and digital manufacturing solutions, ensuring future-proofing and enabling data-driven optimization for enhanced operational efficiency and predictive maintenance strategies.

Frequently Asked Questions

1. What is the primary function of the SIEMENS 6SL3720-1TG31-8AA3?

This module serves as a high-performance single motor drive for industrial applications. It precisely controls motor speed, torque, and position. Its advanced capabilities ensure optimal performance in demanding scenarios.

It offers robust power delivery at 690V, making it suitable for heavy-duty machinery. The integrated CIM facilitates seamless communication within the SINAMICS S120 control system.

The primary goal is to provide efficient and accurate motor control, contributing to increased productivity and reduced energy consumption in industrial processes.

2. How does the CIM in the 6SL3720-1TG31-8AA3 enhance system integration?

The CIM (Control Interface Module) acts as a vital communication bridge. It connects the motor module to the CU320-2 control unit, enabling data exchange.

This interface allows for the transmission of control commands, status information, and diagnostic data between the drive and the controller. It supports various fieldbus protocols for flexible networking.

Enhanced integration simplifies commissioning, parameterization, and diagnostics, reducing engineering effort and improving system responsiveness.

3. What are the key advantages of using a SINAMICS S120 motor module like the 6SL3720-1TG31-8AA3?

The SINAMICS S120 platform offers superior motion control performance with advanced vector control algorithms. This ensures high precision in speed and position regulation.

It provides exceptional energy efficiency through intelligent control and regenerative capabilities, lowering operational costs. The robust design ensures high reliability and a long service life.

The system's scalability and integration capabilities within the TIA Portal environment facilitate seamless expansion and adaptation to evolving industrial needs.

4. What type of motor can be connected to the SIEMENS 6SL3720-1TG31-8AA3?

This module is designed to drive synchronous and asynchronous motors. It supports a wide range of motor types commonly used in industrial automation.

The 160kW power rating and 175A current capacity allow it to handle significant motor loads. Proper motor selection should align with these specifications.

Precise parameterization within the TIA Portal is crucial to match the drive's control characteristics to the specific motor's performance data for optimal operation.

5. What are the typical industrial applications for this 690V SINAMICS S120 module?

It is ideal for demanding applications requiring high power and precise control, such as in machine tools and automated production lines. Its 690V rating suits heavy industry uses.

Applications include pump and fan control for variable speed and energy saving, material handling systems, and processing machinery in chemical plants.

The module's dynamic performance makes it suitable for dynamic servo applications and complex motion profiles where rapid acceleration and deceleration are needed.

6. What safety features are incorporated into the 6SL3720-1TG31-8AA3?

This drive module typically incorporates essential safety functions like Safe Torque Off (STO). STO prevents unintended motor movement, a critical safety measure.

Additional safety integrated functions (SIF) may be available depending on the control unit configuration and firmware version. These can include safe speed monitoring.

Adherence to safety standards and proper implementation of safety functions are crucial for risk mitigation in any industrial automation system.

7. How is the 6SL3720-1TG31-8AA3 commissioned and parameterized?

Commissioning is primarily performed using Siemens' TIA Portal engineering software. This platform allows for intuitive configuration and parameter setting.

Key parameters include motor data, control modes (V/f, vector control), and operating limits. The integrated CIM simplifies the connection and communication setup.

Comprehensive wizards and diagnostics within TIA Portal aid in a streamlined and efficient commissioning process for the drive system.

8. What is the role of the CU320-2 control unit with this motor module?

The CU320-2 serves as the central intelligence for the SINAMICS S120 drive system. It executes the control algorithms and manages communication.

It processes commands from higher-level controllers (like PLCs) and translates them into motor control signals via the motor module. It also handles diagnostics and status reporting.

The CU320-2 enables advanced functions, safety integration, and flexible connectivity, making it essential for the full utilization of the motor module's capabilities.

9. What maintenance is recommended for the SIEMENS 6SL3720-1TG31-8AA3?

Regular visual inspections for dust accumulation and loose connections are essential. Ensuring adequate ventilation by cleaning cooling fins is critical.

Periodic checks of terminal connections and cable integrity should be performed to prevent electrical faults. Monitoring operational parameters for deviations is also recommended.

Software updates for the CU320-2 and motor module firmware can improve performance and address potential issues, contributing to long-term reliability.

10. Can this module be integrated into existing automation systems or IIoT platforms?

Yes, the SINAMICS S120 platform is designed for broad integration. It supports common industrial communication protocols for connecting to PLCs and SCADA systems.

Through its communication interfaces, it can transmit operational data, enabling integration with IIoT platforms for monitoring, analytics, and predictive maintenance.

This interoperability ensures that the drive system can be a valuable component in modern, connected manufacturing environments and digital transformation initiatives.