4-channel optocoupler insulation module, signal level module voltage converter 3.3 V to 24 V / 5 V to 24 V / 12 V to 3.3 V / 24 V to 3.3 V / 24 V to 5 V (3.3 V to 24 V)

4 Bit Optocoupler Isolator Module,PLC Signal Level Voltage Converter Board Module (3.3V to 24V)

4 Bit Optocoupler Isolator, PLC Signal Level Voltage Converter Board Module (24V to 3.3V)