12v 2-channel Relay Module With Isolated Optocoupler High And Low Level H Level Trigger Module Triggered By 12v - Temu
3-5V/12V/24V One Way Optocoupler Isolation Module Photoelectric Isolator Signal | eBay
Single Channel 12V Optocoupler Breakout Board — PMD Way
Optocoupler Isolation Board Voltage Converter 24V to 5V/12V to 24V/5V to 24V 4 Channel Isolated Module PLC Signal Level Board - SINONING- Electronics DIY Accessories Store