Can ZED cameras be powered over Ethernet (PoE) or with a 12 V power supply?

No, ZED cameras cannot be powered directly over Ethernet (PoE) or with a 12 V power supply. The power is always provided by the data connection.

USB 3 cameras: ZED 2i and ZED Mini

The ZED 2i and the ZED Mini (and the discontinued ZED 2) are powered at 5 V by the USB port of the host computer, and do not have an auxiliary power input.

If the camera must be installed far from the host computer, use an active or fiber USB 3 extension cable; see Can I use a USB extension cable with my ZED camera?

GMSL2 cameras: ZED X family and ZED X One

The GMSL2 cameras (ZED X, ZED X Mini, ZED X Nano, ZED X One GS, ZED X One S, and ZED X One 4K) are powered over the GMSL2 coaxial cable (Power over Coax) by the ZED Link capture card or the ZED Box they are connected to. No separate power supply is required for the camera.

The GMSL2 connection supports cables up to 15 m; see What type of GMSL2 cable should I use with my ZED X camera?

Using a camera far from the main computer

To use a camera at a distance from the main computer, connect it to an embedded computer installed next to it, such as a ZED Box, and send the data over the network with the ZED SDK local network streaming module.