SIEMENS 6SL3210-1PE21-8AL0 Frequency Converter

Overview

Key Specifications

Electrical Parameters

• Input: 3AC 380–480V (±10%), 47–63Hz
• Rated power & current
  • Heavy Overload (HO): 5.5kW, rated output 13.2A
  • Light Overload (LO): 7.5kW, rated output 18A
• Overload capability
  • HO mode: 200% for 3s, 150% for 57s, 100% continuous 240s
  • LO mode: 150% for 3s, 110% for 57s, 100% continuous 240s
• Output frequency range: 0–550Hz
• Built-in STO (Safe Torque Off) safety function
• Integrated Class A EMC input filter, internal brake chopper (external brake resistor required)
• Switching frequency default 4kHz, adjustable

Mechanical & Environmental

• Dimensions (H×W×D): 291 mm × 100 mm × 165 mm
• Frame size: FSB, IP20 (cabinet installation only)
• Cooling: Built-in axial fan air cooling
• Operating temperature
  • HO mode: -10℃ ~ +50℃
  • LO mode: -10℃ ~ +40℃
• Max installation altitude: 1000m without power derating
• Weight: 3.2kg
• Firmware requirement: CU control unit V4.6 and above
• Note: Control unit and operation panel are sold separately

Main Functions

1. Motor speed & torque regulation
    
   Supports V/F scalar control and sensorless vector control, stable low-speed torque output for fans, pumps, conveyors and light impact loads.
2. Integrated braking circuit
    
   Built-in brake chopper consumes motor regenerative energy via external resistor, suitable for frequent deceleration and emergency stop scenarios.
3. Built-in EMC suppression
    
   Class A filter reduces conductive electromagnetic interference, meets industrial EMC standards without extra external filter in most cabinet layouts.
4. STO machine safety function
    
   Hardware torque cut-off conforming to international machinery safety standards, reduces external safety relay wiring cost.
5. Full multi-level protection
    
   Overcurrent, overvoltage, undervoltage, overload, overheating, motor overload, short circuit, ground fault, phase loss and communication fault monitoring, fault codes uploaded to PLC/HMI.
6. Multi-bus industrial communication
    
   Cooperate with CU control unit to support PROFINET, PROFIBUS, Modbus TCP for seamless connection with upper PLC automation systems.
7. Energy-saving control
    
   Special sleep mode for pump/fan loads to lower idle power consumption and reduce long-term operating costs.

Advantages

• Modular split design (power module + control unit) for easy separate maintenance and function upgrade
• Built-in Class A filter and brake chopper saves auxiliary component investment and cabinet wiring space
• Dual overload modes match different load types (impact loads / steady fluid loads)
• Compact FSB small frame reduces cabinet occupied volume
• Wide temperature range adapts to water treatment, packaging, workshop and other industrial environments
• Complete fault diagnosis system shortens on-site troubleshooting downtime
• Standard DRIVE-CLiQ interface supports external encoder closed-loop high-precision speed regulation