참고자료 : http://www.citelkorea.com/h15/h1514/h1514-1.htm

Citel’s rackmounted camera power supplies are ideal in any multi-camera installations, avoid the need to tie up one electrical outlet per camera, and provide significant advantages over multiple plug-in transformers in safety, convenience, neatness and cost. All models include self-resetting SmartFuses. These react like a glass fuse but reset themselves when the surge has passed or the fault is removed, eliminating costly service calls to replace blown fuses. Built-in surge suppression protects your cameras from transients. Models with 12 and 25 AMPS can be programmed to provide either a 24V output or a 28V output. This allows the installer to select the higher voltage when cameras are located at the end of a long cable run subject to significant voltage drop. Individual LED indication provides confirmation of power to the cameras. Wiring is easy, using removable screw terminals positioned at the back of the unit.