Technical Parameters (SK2404) Model: SK2404 Series: Commander SK Product Type: AC Variable Frequency Drive (Inverter) Input Phase: Single-phase Input Voltage: 200V to 240V AC ±10% Input Frequency: 48 to 62 Hz Typical Power Ratings (Single-phase 230V input): 3.0 kW (4 HP) - most common for SK2404 Output Current: At 3.0kW: Approx. 13.0 A (typical) Output Voltage: 3-phase, 0 to rated input voltage (variable frequency) Output Frequency: 0 to 1500 Hz (programmable) Control Mode: Open-loop Vector (Sensorless) / V/Hz Switching Frequency: 3 kHz to 16 kHz (adjustable, derating above 6 kHz) Overload Capacity: 150% for 60 seconds (Normal Duty rating) Digital Inputs: 4 x programmable digital inputs Analog Input: 1 x analog input (0-10V, 4-20mA selectable) Analog Output: 1 x analog output (0-10V) Relay Output: 1 x changeover relay output (programmable) Communications: Standard MODBUS RTU (RS485) via RJ45 Braking: Standard dynamic braking unit (integrated transistor) Protection Class: IP20 (requires enclosure for installation) Operating Temperature: -10°C to +40°C (at 3 kHz switching frequency, derating to 50°C) Cooling Method: Forced air cooling (integrated fan) Dimensions (H x W x D): Approx. 180 mm x 90 mm x 140 mm (7.1" x 3.5" x 5.5") - typical for size 2 Weight: Approx. 1.5 kg (3.3 lbs) Standards: CE, UL, cUL, EN61800-3, RoHS Typical Applications Conveyors: Material handling, packaging lines, assembly lines Pumps: Centrifugal pumps, booster pumps, dosing pumps Fans: Ventilation fans, exhaust fans, blowers Mixers: Industrial mixers, agitators Machine Tools: Spindle control, auxiliary drives Food Processing: Mixing, conveying, filling applications Textile Machinery: Winding, spinning, auxiliary drives HVAC: Air handling units, fan coils Woodworking: Saws, planers, sanders General Automation: Various industrial machines requiring variable speed control where three-phase power is not available