Poweroff Memory Function This delay relay switch module stores its set parameters even after a power outage, enabling quick resume and uninterrupted operation when power returns. Cycle Timing After poweron, the relay turns on for a defined duration, then turns off for a defined duration, and repeats. This provides precise, repeatable timing and control for automatic processes. Optical Coupler Isolation The relay output uses optical coupler isolation, improving noise immunity and delivering stable, reliable operation. Wide Applications Suitable for controlling the onoff of devices such as solenoid valves, water pumps, and motors. Its simple dutycycle capability makes it a versatile control solution for various tasks. Use scenarios Irrigation and watering systems: drive a pump or valve on a timed cycle to provide regular, repeatable irrigation intervals. Fluid handling and dosing: regulate a solenoid valve to achieve periodic filling, flushing, or dosing cycles. Equipment cycling and cooling: operate a motor or pump on a programmed duty cycle to manage heat buildup and extend equipment life.