This is the American Microsystems part number PWR-8050US, also identified as AML and KDT750. It is a 12VDC, 2.5A power supply specifically required when Power over Ethernet (PoE) is not being utilized.
This unit ensures your American Microsystems devices receive the necessary power for operation when PoE is unavailable or not chosen as the power source.
PWR-8050US - American Microsystems AML, KDT750, POWER SUPPLY, 12VDC, 2.5A, REQUIRED WHEN POE NOT USED