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NOYITO 4-Channel Relay Module DC 5V 12V 24V Self-Locking Triggering Interlocking High Low Level Trigger for PLC Industrial Control (12V): Amazon.com: Industrial & Scientific
MakerFocus Raspberry Pi Expansion Board 4 Channel Relay Board Module Power Relay Module for Raspberry Pi 4B/3 Model B+/Raspberry Pi 3/2 Model B (No Programming Required/Programmable) : Electronics - Amazon.com
SainSmart 4-Channel Relay Module + Free Shipping
Amazon.com: DC 12V RS485 4 Channel Relay Module with Optocoupler Protection, STM8S103F3 Relay Board Microcontroller Communication : Industrial & Scientific
4 Kanal 5V Relay Relais Module Modul für Arduino TTL-Logik : Amazon.de: Elektronik & Foto
4 Kanal Relais Modul 5V High/Low Level Trigger einstellbar: Amazon.de: Auto & Motorrad
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MakerFocus Raspberry Pi Expansion Board 4 Channel Relay Board Module Power Relay Module for Raspberry Pi 4B/3 Model B+/Raspberry Pi 3/2 Model B (No Programming Required/Programmable) : Electronics - Amazon.com