Product Name: Voltmeter/LED Digital Voltmeter/Single -Phase AC Digital Voltmeter/Lnf22e Voltmeter Model NO.: LNF22E Customized: Non-Customized Certification: RoHS Type: Energy Meter Power Meter Connection: Terminal Theory: Electronic Meter Electric Equipment: Single-phase Installation: Direct Connected Display: Digital Origin: China Product Description LNF22E single-phase AC LED digital voltmeter supportsprogrammable transformation ratioand RS485communication withModbus RTU protocol.It can be used todirectly replaceanalog pointer voltage meterandcan be widely used in different control systems, power transformation and distribution automation, industrial automationand intelligent buildings.DisplayDisplay modeLEDAccuracyVoltage0.5%Frequency±0.01HzVoltage inputRange57.7/100/230/400VResolution0.1 V Impedance≥1.7 MΩ/phasePower consumption≤0.1 VA /phaseOver voltageContinuous:1.2Vn; instantaneous:2Vn/1minFrequency45 Hz~65 HzCommunication portPhysical interfaceRS-485Communication speedUp to 9.6 kbpsCommunication protocolModbus-RTUIsolation voltage2000 VAC (1 min)Working power supplyRated rangeAC/DC(80~270)VPower consumption≤3VAWithstand voltage≥2kVWorking environmentWorking temperature-10°C -- 55°CStorage temperature-25°C ~70°CRelative humidity≤95%RH, no condensationWorking altitude≤2500mAnti-pollution degreeNo corrosive gasProtection degreeFront case IP54, rear case IP20InsulationResistance between signal, power supply, output terminals and case >100MΩ Withstand voltageInput and power supply ≥2kV, input and output ≥2kV,power supply and output ≥2kV EMCElectrostatic discharge surge immunityIEC 61000-4-2-III Radiated, radio-frequency, electromagnetic field immunityIEC 61000-4-3-III Electrical fast transient/burst immunityIEC 61000-4-4-IVSurge immunityIEC 61000-4-5-IV Immunity to conducted disturbances, induced by radio-frequency fieldsIEC 61000-4-6-III Power frequency magnetic field immunityIEC 61000-4-8-III Voltage dips, short interruptions and voltage variations immunityIEC 61000-4-11-III