6SL3352-1AG31-2AA1

1. Basic Model & Classification

2. Core Technical Parameters

3. Main Functions & Applications

Core Functions

• Regenerative Energy Consumption: When the motor operates in the generating state (e.g., rapid deceleration, lowering heavy loads), it feeds regenerative energy back to the DC link, causing voltage rise. The braking module activates at this point, connecting the braking resistor to consume excess energy as heat, preventing overvoltage faults in the drive system.
• Overvoltage Protection: Serves as a key safeguard for the DC link. It monitors the bus voltage in real-time and triggers braking action immediately once the voltage reaches the preset threshold (typically around 660V DC for 540V DC systems), ensuring stable operation of power modules and motor modules.
• System Coordination: Seamlessly communicates with the SINAMICS S120 control unit (e.g., CU320-2) and power modules, realizing automatic activation/deactivation without additional independent control circuits.

Applicable Scenarios

• High-Dynamic Motion Systems: Such as CNC machine tools (where feed axes frequently accelerate/decelerate), robotic arms (with frequent start-stop and reversing movements), and high-speed conveying lines.
• Potential Energy Load Applications: Including hoists, elevators, and stacking machines, where regenerative energy is generated when loads are lowered.
• Large-Inertia Load Drives: For example, centrifuges and fans, which produce substantial regenerative energy during rapid deceleration.

4. Key Matching & Precautions

Matching Components

• Mandatory Matching: Must be used with a braking resistor (Siemens recommended model: e.g., 6SL3000-0BE25-5AA0, with resistance and power matching the module's parameters). Using mismatched resistors may cause module damage or fire hazards.
• Compatible Systems: Only applicable to SINAMICS S120 drive systems with a 540V DC link, matching power modules (e.g., 6SL3330 series) and motor modules (e.g., 6SL3320 series).
• Control Unit Requirement: Relies on the SINAMICS S120 control unit (e.g., CU320-2 PN) for voltage monitoring and control logic execution.

Installation & Usage Precautions

• Electrical Safety: Installed by qualified electrical engineers in accordance with Siemens' guidelines. Ensure reliable grounding, and disconnect the main power supply before wiring or maintenance.
• Heat Dissipation: Reserve a minimum of 50mm clearance around the module for air circulation. The braking resistor generates significant heat and should be installed in a well-ventilated area or separately in a resistor cabinet.
• Resistor Matching: Strictly follow the module's technical manual to select braking resistors with appropriate resistance (minimum resistance not lower than the module's required value) and power rating to avoid overload burnout.
• Environmental Requirements: Avoid installation in environments with high temperature (>40°C), high humidity (>90% RH, non-condensing), dust, oil fumes, or corrosive gases.

Spare Parts & After-Sales

• Classified as a standard industrial spare part for Siemens SINAMICS S120. Purchase through official authorized distributors to ensure authenticity and compatibility.
• For technical issues (e.g., parameter setting, fault diagnosis), refer to the Siemens official manual or contact Siemens industrial technical support.