counter,preset counter,speed controller,linespeed meter Technical parameter: Power: 85-100% rated voltage AV: 380V, 220V, 110V DC: 12V, 24V Reset numbers: 1-9999(X1, X10, X100, choose by panel switch) Contactor capacity: DC30V 5A AC220V 5A Ambient humidity: -10~+50 Mechanical life ≥ 10^7 Electrical life≥ 10^5 Max counting frequency: <30Hz Min pulse wideband: 15Ms Height above sea level <2000M ...