Description
110 kW VFD with STO – Fluxcon FLC520 High Performance Vector Control
The Fluxcon FLC520 110 kW variable frequency drive is a high performance vector control inverter
for 400V (three-phase) electric motors, featuring a built-in Safe Torque Off (STO) function compliant with IEC 62061.
Specifically designed for industrial applications where functional safety, fast dynamics and reliable
torque behaviour are essential. Suitable for both asynchronous and synchronous AC motors.
Thanks to the dual-channel STO input (H1/H2) with safety monitoring output (DM+/DM−), external safety
contactors are no longer required. In sensorless vector control, 150% torque is already available from 0.5 Hz.
With encoder feedback (closed loop), 150% torque is even available from standstill.
Key features
- Built-in STO function (Safe Torque Off) compliant with IEC 62061
- Conformal coated PCBs (three-proof) against dust, moisture and chemical exposure
- Fire Mode for emergency ventilation in parking garages, tunnels and buildings
- Standard motor temperature sensor (PT100/PT1000/KTY84)
- External brake chopper
Application areas
- Ventilation and smoke extraction systems (Fire Mode)
- Pumps and compressors
- Conveyor belts and material handling
- Lifting equipment requiring STO
- Mixers and agitators
- Winches and elevators
- Machine building with safety requirements per IEC 62061
Control methods and functionality
- Vector control without feedback (sensorless)
- Vector control with encoder feedback (closed loop)
- V/F control
The built-in PLC function supports up to 16 preset speeds via digital I/O. The integrated PID controller
enables process control via an analog signal.
I/O and communication
- 5 standard digital inputs + 2 additional via IO3 card
- 1 high-frequency pulse input (HDI, up to 50 kHz)
- 2 analog inputs (AI1/AI2, 0-10V / 0-20mA)
- 2 analog outputs (AO1/AO2, 0-10V / 0-20mA)
- 1 open-collector output + 1 HF pulse output (HDO, 50 kHz)
- 2 relay outputs (T1, T2 – 5A/250VAC)
- Standard: RS485 Modbus RTU
- Optional via J4: CANopen · Profinet · Modbus TCP · EtherCAT
Technical specifications
- Input voltage: 400V (three-phase)
- Input current: 220 A
- Output current (G/heavy duty): 210 A (150%/60s)
- Output current (F&P/normal duty): 253 A (120%/60s)
- Dimensions (H×W×D): 715×280×370 mm
- IP rating: IP20
- Operating temperature: −10 to +40 °C (derating 40–50 °C)
Industrial reliability
The conformal coating (three-proof) on the electronic components provides excellent protection against
dust, moisture, chemical exposure and vibration. The drive complies with IEC 62061 for functional
safety and with European Directive 2002/95/EC (RoHS).
Documentation
Download the complete FLC520 110 kW datasheet (PDF)
for all technical details, STO wiring diagrams and connection variants.
