Frequency Inverter Clock frequency: 0.7...14.5 kHz Dimensions W x H x D: 108 x 128 x 135.5 mm Operating temperature: -10...+50 °C Output frequency: 0.2...400 Hz Input frequency: 50/60 Hz, 47...63 Hz Overload: 150% IN for 60 s Series: FR-D720S/D740 Start-up torque: &gt, 150% @ 1 Hz Analogue input: 1 x 0...(5) 10 VDC or 4...20 mA DC Analogue output: 1 x 0...10 VDC Digital input: 5 x 24 VDC Digital output: 1 x Open-Collector Output Operating voltage type: 3-phase Protection rating: IP20 Relay output: 1 change-over contact, 250 VAC Operating voltage: 380...480 VAC