The TP-DCDC-xx48DX2-HP and TP-POE-HP-48DX2 are unique high power PoE injectors with Dual 802.3af/at compatible outputs. This means that two devices can be powered from a single PoE injector.
The data path between the units is handled by the injector so no PoE switch is required.
There are models that will run on 12VDC or 24VDC as well as 110/220VAC grid power. The different models have different total outputs up to 70W.
They have two inputs for connecting 2 power sources, like a primary and backup power source. They have various protections for short circuit, overload and surges caused by ESD or lightning.
The built-in surge protection protects sensitive connected devices from damage due to surges on data and PoE lines.
All 8 wires are protected.The input voltage and output voltage are isolated to avoid any grounding or negative voltage issues.