Energy Counter Dimensions W x H x D: 126 x 90 x 70 mm Frequency: 50 Hz Operating temperature: -20...+50 °C Measurement accuracy: Class 1 @ EN 62053-21 Operating voltage: 230/400 VAC Assembly type: DIN-Rail Display type: Mechanical Displays: 7-Digit Measurement input: Direct Operating voltage type: 1-/3-phase Output: Optocoupler Protection rating: IP51 (Front Panel) Character height: 5.2 mm Decimal places: 1 Rated measurement input current: 5 A