The SDIP-12-121 Gigabit adapter is a DC/DC converter that reduces voltage. The device allows us to power devices with a nominal voltage of 12V using PoE 802.3 af or PoE PASSIVE 35-56V. The basic use of the adapter is to power devices such as a camera, a door station with an electric lock that require a 12V power supply. Gigabit bandwidth allows for full use of the transmission speed.