Amazon.com: HiLetgo 4 Channel 24V Relay Module with OPTO-Isolated Support High and Low Level Trigger for PLC Automation Equipment Control : Industrial & Scientific
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Amazon.com: HiLetgo 2pcs DC 24V 2 Channel Relay Module with Isolated Optocoupler High and Low Level H/L Level Trigger Module Triggered by DC 24V : Industrial & Scientific
Amazon.com: PENGYMY Relay 5set My2P HH52P My2NJ Relais Coil General DPDT Mini Electromagnetic Relay Switches with Socket Base LED AC 110V 220V DC 12V 24V (Größe : DC24V) : Automotive