Product introduction:
One 220V AC optocoupler module can be used to detect whether there is 220V AC, and output high and low levels stably (NPN output). When 220V input is detected, the LED light is on and the optocoupler is turned on to output low level. When there is no 220V input , The LED light is off, the optocoupler is blocked, and the output is pulled high by the resistor. Note when using: When using the module, it should be placed in a dry and ventilated environment with insulation protection, and attention to electrical safety.
Product parameters:
Function: Test whether AC 220V exists
output TTL level: MCU can be used for testing, the voltage is 3-5V
output can be connected to PLC 24V
wiring:
When connecting to PLC input, the COM terminal of PLC is connected to the 24V power supply, and the input end is connected to the board Signal output S1-S8, the optocoupler GND is connected to the negative pole of the power supply.
The blue 5.0 terminal is connected to the 220V voltage, and the yellow pin is the signal output.
When the 220V voltage is normal, the output is low level; when 220V is powered off, the output is high level.
Note:
After the module is powered on, do not touch any part of the white wire frame on the board as it is high voltage. Pay attention to electrical safety.
Instructions for use:
1. MCU connection
Function description: When the input terminal L N has power, the input LED light is on, the photocoupler is turned on, and the output is low. The microcontroller detects a low level.
When there is no power at the input terminal, the input LED light is off and the optical coupling is blocked, and the output is pulled high by the resistor. The microcontroller detects a high level.
2. PLC does not need external power supply
The MCU IO only needs to be grounded or connected to the power supply+
If it is a substitute button, the positive and negative poles of the two pins of the button must be distinguished, and the positive pole OUT and the negative pole must be connected to GND
Note:
The components in the white wire frame of the L and N input terminals are high-voltage electricity. When the module is powered on, do not touch any components in the white wire frame on the board because it is high-voltage, pay attention to the safety of electricity!
Package Included:
1 x 8-Bit AC 220V Optocoupler Isolation Module