1Equipped advanced high-quality timing chip control with accurate timing, have much better performance than the 555 chip 2The trigger end has a opto-isolator with strong anti-interference ability, you can use a normally open type switch or sensor to trigger the module 3There are 8 kinds of time range options, the shortest is 0.1 second, and the longest is 1 hour. Also has protection diode to anti reverse power connection to protect the module better 4Possess delay adjustment potentiometer, clockwise adjustment the time will be longer 5Suitable for home intelligent systems, anti-theft alarm delays, door control systems, automatic equipment control, PLC industrial control, electronic development, etc.Item Type: Trigger Delay RelayApplication: This module is a trigger delay module when the switch is turned on instantly. Can be used in home intelligent systems, anti-theft alarm delays, door control systems, automatic equipment control, PLC industrial control, electronic development, etc. Can be connected to large current load (250Vac|10A or 30V dc 10A)1x Trigger Delay Relay