SINAMICS S120 Active Line Module 6SL3130-7TE21-6AA4

The Siemens 6SL3130-7TE21-6AA4 is a SINAMICS S120 Active Line Module (ALM) used in Siemens multi-axis servo drive systems. It converts incoming AC power into a regulated DC link voltage and can return regenerative braking energy back to the power grid, improving overall system efficiency.

🔧 Basic Identification

📌 Siemens officially describes this unit as:
“SINAMICS S120 Active Line Module, input 3-ph 380–480 V, output DC 600 V, 27 A, 16 kW, Booksize.”

⚙️ Main Functions

The 6SL3130-7TE21-6AA4 is designed to:

• Convert 3-phase AC supply into a regulated DC bus
• Supply power to SINAMICS S120 Motor Modules
• Return braking energy back to the electrical grid
• Maintain stable DC link voltage during line fluctuations
• Improve power factor and reduce harmonic distortion
• Support high-performance multi-axis motion systems

Unlike standard rectifier modules, the Active Line Module uses an IGBT front end that allows bidirectional power flow.

📋 Technical Specifications

Technical values are listed in Siemens SINAMICS S120 product catalogs and industrial distributor specifications.

🧠 System Role

In a SINAMICS S120 architecture:

Control Unit (CU)
→ controls
Active Line Module (6SL3130-7TE21-6AA4)
→ supplies DC bus power to
Motor Modules
→ drive
servo motors

The Active Line Module serves as the power infeed and energy regeneration unit for the entire drive system.

🔋 Advantages of Active Line Technology

• Regenerative braking energy returned to mains
• Reduced heat generation compared to braking resistors
• Near-unity power factor (cos φ ≈ 1)
• Stable DC bus voltage
• Lower harmonic distortion
• Improved energy efficiency in dynamic motion systems

These benefits make Active Line Modules common in high-performance servo applications.

🏭 Typical Applications

• CNC machine tools
• Robotics systems
• Packaging machinery
• Printing and converting equipment
• Material handling systems
• Multi-axis industrial automation

🧾 Short Website Description

The Siemens 6SL3130-7TE21-6AA4 is a SINAMICS S120 Active Line Module designed for high-performance multi-axis drive systems. Rated at 16 kW with a 600 V DC output, it converts 3-phase AC power into a regulated DC link while enabling regenerative energy feedback to the mains. It is ideal for CNC machines, robotics, and advanced industrial automation applications.