Siemens 6SL3210-1KE21-3UB1 G120 VFD for Continuous Operation Frequency 12.5A 5.5kW

The Siemens 6SL3210-1KE21-3UB1 G120 Variable Frequency Drive (VFD) is engineered for demanding industrial applications requiring precise motor control and exceptional reliability in continuous operation. This unit delivers a robust 5.5 kW (7.5 HP) power output with a maximum frequency of 12.5 A, making it suitable for a wide range of machinery. Its advanced features include enhanced energy efficiency, sophisticated protection mechanisms, and seamless integration capabilities, positioning it as a superior choice for optimizing performance in continuous process environments.

Product Specifications

| Feature              | Specification                                       |

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

| Manufacturer     | Siemens                                             |

| Product Number   | 6SL3210-1KE21-3UB1                                  |

| Series           | SINAMICS G120                                       |

| Power Rating     | 5.5 kW (7.5 HP)                                     |

| Output Current   | 12.5 A                                              |

| Input Voltage    | 380-480 V AC, 3-Phase                               |

| Output Frequency | 0-600 Hz                                            |

| Control Type     | Vector Control, V/f Control                         |

| Protection Class | IP20                                                |

| Mounting Type    | Cabinet Mount                                       |

| Operating Temp.  | -20°C to +50°C                                      |

| Cooling Method   | Forced air cooling                                  |

| Communication    | Profibus DP, Profinet, EtherNet/IP (optional)       |

| Dimensions (H/W/D)| Varies by Control Unit and Power Module configuration |

Core Features & Market Positioning

The SINAMICS G120 platform, exemplified by the 6SL3210-1KE21-3UB1, distinguishes itself through its modular design, allowing for flexible configuration and easy maintenance. Its advanced vector control algorithms provide exceptional torque accuracy and dynamic response, even at low speeds, which is critical for applications demanding precise motion control. The drive's integrated safety functions, such as Safe Torque Off (STO), enhance operational safety and reduce the need for external safety components. This combination of performance, flexibility, and integrated safety solidifies its market position as a leading solution for complex industrial automation tasks.

Key Application Scenarios

The Siemens 6SL3210-1KE21-3UB1 G120 VFD is ideally suited for a multitude of continuous operation applications across various industries. This includes its deployment in conveyor systems for material handling, pump and fan control in HVAC and water management systems, and complex machinery in the manufacturing sector, such as extruders and mixers, where consistent speed and torque are paramount. Its robust performance also makes it a strong candidate for textile machinery and printing presses, where precise speed regulation directly impacts product quality.

Practical System Integration Guidance

Integrating the Siemens 6SL3210-1KE21-3UB1 into an industrial control system is facilitated by its flexible communication options and standardized hardware interface. For optimal performance, correct wiring of power and control cables is essential, adhering strictly to the terminal assignments detailed in the Siemens documentation. Commissioning typically involves parameterization via the Siemens HMI (Human Machine Interface) or through fieldbus communication using TIA Portal software. Key parameters to configure include motor data, control modes, and limit values for speed and current to ensure safe and efficient operation.

Operation and Risk Mitigation

Safe operation of the Siemens 6SL3210-1KE21-3UB1 necessitates adherence to electrical safety standards and proper installation practices. Users must be aware of the drive's internal protection features, such as overcurrent, overvoltage, and undervoltage protection, which automatically safeguard the unit and connected motor. Common troubleshooting involves checking fault codes displayed on the HMI; for instance, a "F0001" fault typically indicates an overcurrent condition, requiring an inspection of motor load and acceleration ramps. Regular maintenance, including cleaning of cooling vents, ensures continued reliable performance and prevents potential overheating issues.

Scalability & Long-Term Value

The SINAMICS G120 platform offers significant scalability, allowing for system expansion and upgrades. The modular architecture means that control units and power modules can be replaced or enhanced independently, accommodating future increases in performance demands. Compatibility with Siemens' TIA Portal (Totally Integrated Automation) enables seamless integration into broader automation architectures, including IIoT (Industrial Internet of Things) solutions, facilitating data acquisition, remote monitoring, and predictive maintenance strategies. This forward-looking design ensures long-term value and adaptability to evolving industrial needs.

Frequently Asked Questions

What is the primary function of the Siemens 6SL3210-1KE21-3UB1?

This VFD controls motor speed and torque precisely. It's designed for continuous industrial operation, ensuring optimal performance.

It provides significant energy savings by matching motor output to load requirements. This unit offers advanced protection features for motor and drive longevity.

The 6SL3210-1KE21-3UB1 is crucial for applications needing variable speed and enhanced process control. It supports various communication protocols for integration.

What are the key technical specifications for this G120 VFD?

The Siemens 6SL3210-1KE21-3UB1 has a 5.5 kW power rating. Its output current is 12.5 A, designed for 380-480V 3-phase input.

It supports a wide output frequency range, up to 600 Hz, with advanced vector control. The drive features an IP20 protection class for cabinet mounting.

Essential parameters include its operating temperature range of -20°C to +50°C and forced air cooling. It supports various industrial communication protocols.

How do I integrate the Siemens 6SL3210-1KE21-3UB1 into my system?

Proper wiring of power and control circuits is critical, following manual specifications. Ensure correct grounding for safety and signal integrity.

Commissioning involves parameter setup via HMI or TIA Portal software. Key settings include motor data, control modes, and acceleration/deceleration ramps.

Connect to your control system using supported fieldbus protocols like Profibus or Profinet. Consult the Siemens documentation for detailed wiring and configuration examples.

What are common applications for the 6SL3210-1KE21-3UB1?

This VFD is ideal for pump and fan control in HVAC and water systems. It provides precise speed regulation for conveyor belts in material handling.

It's used in various manufacturing machines like extruders, mixers, and presses. Its continuous operation capability ensures reliable performance in demanding environments.

Applications requiring accurate torque control at low speeds also benefit greatly. This includes textile machinery and specialized processing equipment.

What safety features does this VFD include?

The drive incorporates Safe Torque Off (STO) functionality. This function prevents unintended motor startup, enhancing operator safety.

It offers comprehensive internal protection against overcurrent, overvoltage, and undervoltage conditions. These features safeguard the drive and motor from damage.

Ensure proper grounding and follow all safety guidelines during installation and operation. Regular checks of safety interlocks are also recommended.

How can I troubleshoot common faults with the Siemens 6SL3210-1KE21-3UB1?

Refer to the drive's HMI for specific fault codes. A common fault like F0001 indicates overcurrent.

For overcurrent faults, check motor load and acceleration settings. Ensure the motor is correctly sized for the application and the drive's capacity.

Verify wiring integrity and the absence of short circuits. If issues persist, consult the Siemens technical support or a qualified technician.

What is the power and current rating of the 6SL3210-1KE21-3UB1?

This Siemens VFD provides a 5.5 kW motor power output. It has a maximum output current rating of 12.5 A.

This makes it suitable for motors within this power and current range. Always ensure your motor specifications align with the VFD's capabilities.

The drive is designed for 3-phase AC input voltages between 380V and 480V. This broad input range offers flexibility in power supply configurations.

Can this VFD be used for applications requiring high-speed operation?

Yes, the SINAMICS G120 VFD can achieve output frequencies up to 600 Hz. This allows for high-speed motor operation.

The drive's advanced control algorithms ensure stable performance even at elevated speeds. This is crucial for applications like high-speed spindles or fans.

Ensure the motor itself is rated for the intended high-speed operation and that all safety precautions are in place. Proper motor and VFD matching is key.

What communication options are available for the 6SL3210-1KE21-3UB1?

This drive supports standard industrial communication protocols. These include Profibus DP and Profinet for seamless integration.

Optional communication modules allow for integration with EtherNet/IP and other network types. This provides flexibility for diverse automation systems.

Using these protocols enables remote monitoring, control, and parameterization of the VFD. It's essential for modern industrial automation and IIoT applications.

How does the modular design of the SINAMICS G120 benefit users?

The modularity allows for independent upgrades or replacement of control units and power modules. This simplifies maintenance and reduces downtime.

It enables flexible configuration, letting users select the precise components needed for their application. This optimizes cost and performance.

This design enhances the long-term value and adaptability of the VFD. It ensures the system can evolve with changing industrial requirements.