Item Type: Time Delay Relay Module Product Material: PCB Module Console: 3 Wire Interface, All Interfaces Have Terminals DC+: Positive Pole Of DC Power Supply DC-: Negative Pole Of DC Power Supply CH1: Input Detection Interface, Active High Relay Output: 3 Wire Interface, All Interfaces Have Terminal Blocks NO: Relay Normally Open Interface, The Relay Is Suspended Before Closing, And Short Circuited With COM1 After Closing COM: Relay Common Interface NC: Relay Normally Closed Interface, Short Circuit With COM1 Before The Relay Picks Up, And Hangs After Picking Up 1、18 Kinds Of Functions: Newly upgraded to version 2.0, the module functions have been increased from the previous 8 to 18 to meet more application needs. 2、Power Supply Anti Reverse Connection: Increase the power supply anti reverse connection function, so that the module will not be damaged due to wrong power connection. 3、High Withstand Voltage: The high withstand voltage power supply module is used to replace the previous discrete power supply, and the system is more stable and reliable. 4、0.1s Timing Function: Added 0.1 second timing function, and the timing accuracy has been upgraded from 0.1 second to 0.01 second. 5、Automatic Power Saving: Add automatic power saving function, users can set it by themselves. 1 x Control Module