Counts down pulses from a preset value and triggers a change-over contact on reaching zero (30 W / 100 VA / 220 VAC 2 A max.). Contacts return to original position when the counter is reset to zero. Press the reset button to repeat the cycle. Speed for a pulse / pause ratio = 1: - 20 pulses / sec. in Vdc min. 25 ms / max. unlimited - 10 pulses / sec. in Vac min. 50 ms/max. unlimited. Protection index IP40 and IP55 with PVC protector.