These multifunction devices offer up to 21 modes of operation (varies by unit) and digital timing accuracy. Both offer a retriggerable single shot function, which is ideal for the monitoring of a pulse train when connected to a sensor to detect motion. Motion and/or zero speed detection is accomplished by counting the number of pulses from an external motion sensor/device. These pulses continuously reset the control thereby, preventing it from completing its time delay. If a pulse is missing, the control completes its time delay and the load changes state. Each product is housed in a plug-in package.