Take the red wire, and connect the positive connection of the power supply to the positive connection on the switch. Your switch ships with at least one installed power-supply module (AC or DC, depending on your order). This is basically what you want to end up with: simulate this circuit – Schematic created using CircuitLab In your image, you would take a short wire from L on the back of the plug to the "I" (or. Below is a step-by-step guide on how to install an industrial PoE ethernet switch, covering the entire process from preparation to final testing: 1.
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