8 Channel relay Module,Low Level Trigger Module With Optocoupler(12V),

Long term stable: The relay module uses high-quality electronic components and precision technology to ensure durability. Long term stable: The relay module uses high-quality electronic components and precision technology to ensure durability. Delicate made: This low level trigger supports all MCU controls, PLC controls and smart home controls. Versatile and multipurpose: This relay module with optocoupler is suitable for industrial applications, safe and Invincible capability: 8-channel relay module is suitable for automatic control switch. Thoughtful design: When the relay is not closed, the common terminal of the relay is connected to the normally closed terminal, and the load does not work when the load is out of power. When the relay is closed, the common terminal of the relay is connected to the normally open terminal, and the load works with electricity.