When input voltage is applied to the CLRB, the first delay period (off time) begins. At the end of the off time period, the internal relay is energized and the second delay period (on time) begins. At the end of the on time, the interval relay is de‑energized. The CLRB will continue to cycle the internal relay until the input voltage is removed. Separate knobs are used to adjust the off and on times. (The CLRB is also available with reverse operation.)
