4 Channel DC 8V 36V LED Display Multi function Relay Module Board With optocoupler Self locking Timing Relay Module|Relays

​Features: 1. Linkage function of each channel; 2. With 4 channels of input and output control, each channel can be set with 20 functions to meet more application requirements; 3. DC 8V-36V wide voltage input, with power supply anti-reverse connection function, will not damage the module due to wrong power supply; 4. With power indicator light, relay pull-in indicator; 5. At least 1 second timing function can be set, and the timing accuracy is better than 1%; 6. Increase the automatic power saving function; 7. All setting options can be saved automatically, and the setting contents will not be lost when power is off; 8. The trigger signal input terminal supports user selection, high level or low level pulse triggering;   Module function The user can select one of the following 20 functions by pressing the button and display, and can arbitrarily combine the linkage mode between the various paths, and can set and save the function parameters. The T1 and T2 time parameters