Count ranges >> 0 to 99999999 Max. counting speed >> 30 Hz /1 kHz (switching) Minimum input signal width >> 30 Hz: 16.7 ms 1 kHz: 0.5 ms Input mode >> Increment Reset system >> External and manual reset Input signal >>Count input, Reset Input method >>No-voltage input No-voltage input (No-contact input) >> Short-circuit (ON) impedance: 10 kΩ max. Residual voltage >>0.5 V max. Open circuit impedance>> 750 kΩ min.