Edge-triggered wiping relay

An input signal generates a signal of specified length at the output (retriggering).

The output status is switched to Hi after the input Trg is set to Hi. The configured time is started at the same time. After expiration of the configured time, the output Q status is reset to Lo (pulse output). If the input status changes again from Lo to Hi (retriggering), before the specified time has expired, the time is reset and the output remains switched on.