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Specification: Size: 66 * 21mm he leading chip: NE555 The operating voltage: DC 12V / DC 5V Features: 1: Turn on the power, the relay not on time suction (this module solely not on time suction and function, no delayed disconnect function, except the flexibility failure) Specifically: after energy on, the relay are usually not immediately absorbed and, at this time, the state of the relay output is: usually open and public disconnect, usually closed and public conduction; wait until after a put off of 1-10s (delay adjustable), the relay absorbed and, at this time, the state of the relay output is: usually open and public conduction, usually closed and public disconnect; as lengthy because the module does not quit the power, the state (the relay absorbed and state) will always stay Test phenomenon: after strength on, the pink power indicator light, look forward to a put off of 1-10S, the relay suction and will hear a “ta” sound, and the blue relay suction and indicator gentle 2: Delay time is adjustable, (0 ~ 10 seconds) 3: broaden the potentiometer can broaden the put off time 4: develop capacitance C1 can broaden the postpone time 5: with input strength indicator 6: With the relay suction indicator 7: can management AC 220V/10A a device (Control equipment 2000W) 8: with relay recent defense 9: put off time formula: T = 1 for example: capacitance 100uf resistance 100K T = 1 * one hundred thousand * 0 = eleven seconds