Optocoupler Isolation Board 8 Channel PLC Voltage Detection Module 220V AC For

--\n--\n--\n--\n--\n--\n--\n--\n--\n--\n--\n--\n--\n--\n--\n--\n--\n--\n\nFeature: \n 1. PLC Connection: When connecting the PLC input, the COM terminal is connected to the 24V power supply, the input terminal is connected to the signal output S1\u2011S8 of the board, and the optocoupler GND is connected to the negative pole of the power supply.\n2. Volt Detection: Used to detect whether AC 220V exists, can also use MCU for testing, and the working voltage is 3\u20115V.\n3. Level Output: When the 220V voltage is normal, it outputs a low level. When the 220V is powered off, it outputs a high level.\n4. Working Tips: The blue 5.0 terminal is connected to the 220V voltage, and the yellow pin is the signal output.\n5. Good Material: Adopting high quality PCB material, not easy to malfunction, very durable for long term use. \n\nSpecification: \n\nItem Type: Optocoupler Isolation Board\nMaterial: PCB\nFunction: Test whether AC 220V exists. \nOutput TTL Level: MCU can be used for testing, -