... -20mA 2.High accuracy,strong resistance to interferences. 3.40-60HZ. 4.CE certificate AC frequency transducer YDD- ... AC110V±10,P2:AC220V±15,P3:DC110V-330V Frequency rangeF1:45-55Hz,F2:48-52Hz, F3:40 ... YDD-F-V2-P2-F1-O4 YDD series frequency transducerInput voltage :AC 220V±40% Auxiliary power supply ... :AC220V±15 Frequency range:45-55Hz output:DC4-20mAWhen ordering, please ...