Poweroff Memory Function: The delay relay switch module saves its setting parameters when power is lost, so you do not need to reconfigure after a power outage. This improves reliability and reduces downtime in systems that may experience interruptions. Cycle Circuit Operation: The relay turns on for a set duration after poweron, then turns off for a set duration, cycling repeatedly. This provides automated timing control for periodic actions without continuous supervision. Optical Coupler Isolation: The output uses optical coupler isolation, which improves immunity to electrical noise and enhances stability and reliability in demanding environments. Wide Application: Suitable for controlling the onoff of various devices such as solenoid valves, water pumps, and motors, making it useful in a range of automation tasks. Practical use scenarios Automatic irrigation systems: Configure the module to cycle valve actuation on and off to manage watering schedules, maintaining consistent irrigation even after a power outage. Small pump or valve control: Use the relay to automate start/stop cycles for pumps or solenoid valves in compact or DIY systems, helping to prevent overheating and reduce manual intervention. Equipment sequencing and timing: Drive solenoids or small motors in automated processes that require periodic actuation, with reliable restart behavior after power restoration.