Trigger Board Cover 1 2 4 6 8 16 Channel Relay Module Shield With Optocoupler 10A 5V 12V 24V Output Relay Electronic Components Features: 1. Wide Compatibility: This trigger board cover supports all microcontroller control, so it is suitable for roacute; platforms such as 51/AVR/AVR/arm. It can be used in automation control industrial applications, programmable logic controller and home use. 2. High-quality relay: The cover of the trigger board uses high-current (AC250V10A DC30V10A) relays, with independent wiring of the contact part, ensuring reliability. 3. Standard interface: The relay interface board has a standard interface, which ry allows it to be easily expanded to roacute; development boards. It has roacute; Also fixed screw holes for convenient installation. 4. Bright Indicators: The relay operation indicators are clear, with illumination when the relay is energized and without illumination when n