6SE7021-8TB71-Z Siemens Frequency Converter | VFD Drive

Siemens 6SE7021-8TB71-Z Frequency Converter: Precision Drive Control

Key Technical Specifications

• Brand & Model: Siemens 6SE7021-8TB71-Z frequency converter.
• Power Rating: 2.2 kW for standard induction motors.
• Input Voltage: 380-480 V AC, three-phase, 50/60 Hz.
• Output Current: Nominal 5.5 A, maximum 6.9 A.
• Frequency Range: 0 to 300 Hz for flexible speed control.
• Control Method: V/f control or vector control without encoder.
• Protection Class: IP20 rating for indoor panel installation.
• Ambient Temperature: Operates from 0°C to +40°C reliably.
• Storage Temperature: Handles -25°C to +70°C without damage.
• Overload Capacity: 150% for 60 seconds, 200% for 3 seconds.
• Digital Inputs: Six programmable isolated inputs.
• Analog Inputs: Two channels, 0-10V or 0/4-20mA selectable.
• Communication: Built-in USS protocol via RS485 interface.
• EMC Filter: Integrated class A filter reduces interference.
• Efficiency: High 97% typical at rated load.
• Resolution: Frequency setting resolution at 0.01 Hz.

Frequently Asked Questions (FAQ)

• Q: Is this the genuine Siemens 6SE7021-8TB71-Z?
  A: Yes, we supply only brand new and original Siemens products.
• Q: Can this drive run a 1.5 kW motor safely?
  A: Yes, the 6SE7021-8TB71-Z works well for motors up to 2.2 kW.
• Q: Does the unit include a built-in braking chopper?
  A: No, this model requires an external braking resistor for dynamic braking.
• Q: What communication protocols does it support?
  A: It supports USS and Modbus RTU through the RS485 port.
• Q: How do I reset the factory default parameters?
  A: Set parameter P053 to 6, then set P060 to 2 for a complete reset.
• Q: Do you have stock for immediate shipping?
  A: Yes, we have the 6SE7021-8TB71-Z in stock ready to ship.
• Q: Can I use this drive at 50°C ambient temperature?
  A: You must derate the output current by 2.5% per °C above 40°C.

For inquiries, please contact us: sales@nex-auto.com or +86 153 9242 9628.

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