This product is a 2-channel isolation module based on PC817 optocoupler, which can achieve signal isolation transmission between different voltage domains.
This module is compatible with various 3.3V/5V/24V microcontrollers, PLCs, and other digital circuits' IO ports, and is used to electrically isolate control signals from the high-voltage load side.
The core function is to achieve signal level conversion and electrical isolation, effectively suppressing interference. After the input side conducts, the output side synchronously conducts, which can drive the subsequent stage transistor, MOS transistor or small relay.
The input signal voltage is 3.6-24V, the output side voltage is 3.6-30V, and the output current does not exceed 50mA. Note that it is only applicable to low-frequency signals below 4kHz.
The module size is approximately 38x29x12mm, with a blue flame-retardant plastic shell. During installation, it is important to note that the input and output grounds are independent of each other, and the output high/low level can be set through jumper caps.