I have a touchscreen that requires 12V DC. I'd like to power it from a DC power supply about 50 feet away (accounting for voltage drop) to keep the installation as clean as possible. I'm concerned that the long cable could couple to a magnetic field from a nearby lightning strike and ruin the monitor. It seems there should be some sort of transient voltage suppression where the power cable is connected to the monitor to prevent this.
Is there anything off-the-shelf I could use for this or do I need to cobble something together?
How do PoE devices keep from getting blown up? The transformers attached to the data lines would inherently protect the data lines but it seems the DC wires would invite disaster for long runs.
Is there anything off-the-shelf I could use for this or do I need to cobble something together?
How do PoE devices keep from getting blown up? The transformers attached to the data lines would inherently protect the data lines but it seems the DC wires would invite disaster for long runs.
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