Amazon.com: NOYITO 4-Channel Optocoupler Photoelectric Isolator Module Level Voltage Converter Module PLC Signal Converter Module PNP NPN to PNP ( 12V to 5V) : Industrial & Scientific
Amazon.com: Icstation 24V to 5V 8 Channel PLC-PNP Signal Converter, Optocoupler Isolation Board, Voltage Level Converter Module : Electronics
Relay Module, 2 Channel Relay Module with Optocoupler Isolation High and Low Level Trigger for Arduino 5V/12V/24V(5V) : Amazon.co.uk: Business, Industry & Science
Optokoppler-Isolationsplatte, 12V bis 5V, 4-Kanal-Spannungswandler, isoliertes Modul, SPS-Signalpegelplatine : Amazon.de: Elektronik & Foto
Amazon.com: 5V Relay Module with Optocoupler Isolation Support High and Low Level Trigger Relay Red Board (8 Channel 5V Relay) : Industrial & Scientific
Amazon.co.jp: ANMBEST 5pcs 5V Relay Module and Opto Coupler High or Low Level Trigger Expansion Board for Raspberry Pi Arduino (5V 1 Channel) : Industrial & Scientific
Relay Board, Relay Module 4 Channel with Optocoupler Low Level Trigger Expansion Board for 5V/12V/24V(12V): Amazon.com: Industrial & Scientific
ANMBEST 10PCS 12V Relay Module with Optocoupler High or Low Level Trigger Expansion Board for Raspberry Pi Arduino : Amazon.sg: Industrial & Scientific
NOYITO 1 Channel Relay Module with Isolated Optocoupler 5V 12V 24V High Low Level Trigger Module Triggered (Pack of 3) (5V, Red): Amazon.com: Industrial & Scientific