Wiring:
When connecting a PLC input, the COM terminal of the PLC is connected to the 24V power source to a photocoupler, the input is connected to the circuit board signal output S1-S8.
Blue 5.0 terminals are connected to 220V voltage, yellow pin signal output.
The voltage of 220V is normal, and the output is low level. 220V power off and its output high level.
Note:
The module should not touch any part of the white wire frame on the circuit board after powering it on, as it is high voltage. Pay attention to the safety of electricity.
Package included:
1 x Photocoupler insulation voltage test board for 8 channels PLC AC 220V MCU TTL