Danfoss VLT 101 Basic HVAC Drive

The Danfoss VLT® FC101 Basic HVAC Drive

User-friendly, distributed intelligence and reduced power consumption are beneficial for fan applications. Basic
AHU functions enable the VLT® HVAC Basic Drive to control a wide range of functions. Pump-specific features
developed in cooperation with OEMs, contractors and manufacturers around the world.

Fire Override Mode prevents the VLT® HVAC Basic Drive from stopping for self-protecting reasons. In this mode it will continue vital fan operation regardless of control signals, warnings or alarms. By pressing a few buttons on the Local Control Panel the drive can be set to avoid frequency bands at which connected fans create resonances in the ventilation system. This reduces vibration, noises and wear on equipment.

The drive can, from the speed/current, detect when the motor has lost contact to the fan and set off an
alarm if the belt is broken. The drive can detect speed and direction of a freely spinning fan or pump and “catch” it at the right speed. This feature prevents violent starts and tear on the equipment.

The full range of Danfoss VLT® Drives can be viewed here.

  • Fire override mode 
  • Skip frequencies 
  • Belt monitoring 
  • Flying start 
  • Sleep mode 
  • EC+ concept 
  • Easy commissioning 
  • Maintenance free
  • Save space 
  • Built-in mains filters 
  • Competitive performance 
  • Available enclosures rating IP20, IP21/UL Type 1 and IP54
  • Intuitive control panel 
  • Low installation cost
  • Compact design 
  • Supply voltage: 200 – 240 V ±10%
  • Supply voltage: 380 – 480 V ±10%
  • Supply voltage: 525 – 600 V ±10%
  • Supply frequency: 50/60 Hz
  • Displacement power factor (cos ф): > 0.98 (near unity)
  • Switching on input supply L1, L2, L3: 1–2 times/min.
  • Harmonic disturbance: Meets EN 61000-3-12
  • Output voltage: 0 – 100% of supply voltage
  • Output frequency: 0 – 400 Hz
  • Switching on output: Unlimited
  • Ramp-up and -down times: 1 – 3600 sec.
  • Programmable digital inputs: 4
  • Logic: PNP or NPN programmable
  • Voltage level: 0 – 24 V DC
  • Maximum voltage on input: 28 V DC
  • Input resistance, Ri: Approx. 4 kΩ
  • Analogue inputs: 2
  • Modes: Voltage or current
  • Voltage level: 0 to +10 V (scaleable)
  • Current level: 0/4 to 20 mA (scaleable)
  • Accuracy of analogue inputs: Max. error: 0.5% of full scale
  • Programmable analogue outputs: 2
  • Current range at analogue output: 0/4 – 20 mA
  • Max. load to common at analogue output (terminal 30): 500 Ω
  • Accuracy on analogue output: Max. error: 1% of full scale
  • RS485 interface: Up to 115 kBaud
  • Max. load (10 V): 25 mA
  • Max. load (24 V): 80 mA
  • Programmable relay outputs: 2
  • Max. terminal load (AC) on 1-3 (break), 1-2 (make): 240 VAC, 2 A and 400 VAC, 2 A
  • Enclosure: IP 20/Chassis, (IP 21/Type 1 optional kit), IP 54
  • Vibration test: 1.14 g
  • Max. relative humidity: 5% – 95% (IEC 721-3-3; Class 3K3 (non-condensing) during operation
  • Ambient temperature: up to 50° C
  • Galvanic isolation of all: I/O supplies according to PELV
  • Aggressive environment: Designed for coated/uncoated 3C3/3C2 (IEC 60721-3-3)
  • Fieldbus communication: Standard built-in: BACnet, Modbus RTU, N2 Metasys, FLN Apogee, FC Protocol
  • Protection mode for longest possible up-time: Electronic thermal motor protection against overload, Temperature monitoring of the heatsink ensures that the frequency
    converter trips if the temperature reaches 95° C ± 5° C, The frequency converter is protected against short-circuits on motor terminals U, V, W, The frequency converter is protected against earth faults on motor terminals U, V, W, Protection against mains phase loss