Features Setting Time: The RD72-DC-12V infinite cycle on off relay module has start / stop function, the module enters infinite cycle mode after starting, and the relay works on and off according to the set time. 1000min Delay Time: Infinite-cycle power-on and power-off modules, the delay time can be adjusted separately, the longest delay can be 1000min. Save Energy: Low power consumption of the control board, less than 1W.Passive output (dry contact), a set of normally open + normally closed. The maximum should not exceed 10A. Working Voltage: The button is required to be unlocked (ie self-resetting). It can also be connected to external voltage signals. When the voltage is lower than 2V, it is low level. When the voltage is higher than 2V, it is high level. The maximum input should not exceed 30V. External Wiring Button: This infinite loop relay is passive switch input. The green light turns on after starting, and stays in the red light after stopping. Specification: Item Type: Cyclic On-Off Relay Module Voltage: DC 12V Power Consumption: <1.0W Output: Passive output (ie dry contact), a group of normally open + normally closed. Do not exceed 10A. Life: 100,000 operations Time Range: 0.5 seconds-1000 minutes Time Accuracy: the maximum value of the range * 0.001, that is, 1000-level resolution Start external wiring button: Passive switch input. The green light turns on after starting, and stays in the red light after stopping. The button is required to be unlocked (ie self-resetting). It can also be connected to external voltage signals. When the voltage is lower than 2V, it is low level. When the voltage is higher than 2V, it is high level. The maximum input should not exceed 30V. Wiring Terminal: <-- DC + Module power supply positive input <-- DC - Module power supply negative input --> NO Normally open contact wiring terminal --> COM Common contact wiring terminal of relay --> NO Normally closed contact terminal of the relay, generally not connected. Package List: 1 x Relay Module Package List 1 x Relay Module