The Stöber Posidrive FAS4028 is a three-phase frequency inverter engineered for precise AC motor speed control in industrial applications. It converts fixed 400 VAC supply into variable frequency and voltage output, enabling optimized motor performance across diverse load profiles. The drive combines V/f control and vector control modes with configurable acceleration/deceleration profiles, integrated electromagnetic filtering, and comprehensive overload protection to deliver reliable operation in demanding environments.
Technical Specifications
• Motor Power: 1.5 kW (2.0 HP UL rated)
• Supply Voltage: 3 × 400 VAC (+28%/-55%), 50/60 Hz; configurable for 3 × 480 VAC
• Input Current: 3 × 4.0 A rated; 200% IN / 2 sec., 150% IN / 30 sec. maximum
• Input Power: 2.8 kVA
• Output Voltage: 3 × 0 V to connection voltage
• Output Frequency: 0–200 Hz standard; 0–100 Hz (vector control); 0–400 Hz (spindle mode)
• Switching Frequency: 4 kHz standard, adjustable to 16 kHz maximum
• Short-Circuit Rating: Suitable for networks ≤ 5000 A symmetric nominal short-circuit current at 240 V AC / 480 V AC
• Dimensions: 60 mm × 300 mm × 165 mm
• Weight: 2.1 kg
• Mounting: Vertical orientation within enclosed switching cabinet only
– Key Features
• Dual control architecture: V/f control for multi-motor operation; vector control for precision applications
• Integrated line filter EN 55011 Class B compliant (motor cable ≤ 5 m) / Class A (≤ 25 m)
• EMC performance to EN 61000-4-2, -3, -4, -5 for industrial environments
• Built-in cooling fan with 100 mm minimum free space requirement above and below device
• Brake resistor support: ≥ 100 Ω external resistor recommended with integrated overcurrent relays
• Positor line integration through motor cable (maximum 25 m)
– Typical Applications
Conveyor systems, pump drives, fan controls, spindle applications, and general industrial motor speed regulation requiring variable frequency output.
– Compatibility & Integration
Optional POSIDRIVE FDS 4000 series extension modules available for secondary analog inputs, 4–20 mA current input, analog output, integrated display/keyboard, and additional technology functions. Installation requires copper wiring only on unpainted, conductive mounting plates for EMC compliance.
