CCTV cameras use 5.5mm x 2.1mm or 5.5mm x 2.5mm DC barrel plugs for 12V power supply connections, with the center pin positive convention. Power supplies connect from 12V transformer to individual cameras.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | Center Pin | +12V DC positive | PWR |
| 2 | Outer Sleeve | Ground negative return | GND |
CCTV cameras use 5.5mm x 2.1mm or 5.5mm x 2.5mm DC barrel plugs for 12V power supply connections, with the center pin positive convention. Power supplies connect from 12V transformer to individual cameras.