Description

1 channel 220V AC optocoupler detection module Board size 73mm X15mm Function: can be used to detect the presence of 220V AC The output TTL level can be detected by a microcontroller. The power supply can be 3-5V, or it can be connected to PLC24V level; When connecting to the PLC input terminal, the COM terminal of the PLC is connected to the 24V power supply, the input terminal is connected to the signal output OUT of this board, and the GND on the optocoupler board is connected to the negative pole of the power supply; Green 2P 5.0 terminal is connected to 220V voltage; The 3P terminal is connected to the input of the microcontroller.; safety warning: When practical, do not touch any device in the white frame on the board after the module is powered on, because it is high voltage, pay attention to the safety of electricity.