The Omron H3YN-2-B AC24 is a compact and versatile timer relay with a compact design and self-contained timer unit. This relay is designed to be used in a wide range of time-control applications and features a built-in time range selector switch, enabling the user to easily select among six timing modes. The settings can be adjusted to meet specific needs, including one-shot, interval, cyclic, and cycle-retard timing. It has a wide range of operating voltages, from 110 and 220 volts AC. The relay also features LED indicators to show the timer’s status and a failure indicator that shows when the preset time has been exceeded. Additionally, the relay has two potentiometers and a frequency correction function to improve accuracy.