Thanks to its advantages of uncompressed transmission, zero‑latency output and high‑quality image delivery, SDI cameras have become products developed for the high‑end security market against the backdrop of the current high‑definition camera market. Equipped with SDI interfaces, they can be easily compatible with back‑end encoders, decoders and video servers. When paired with HD video matrices at the control center, video feeds can be projected directly onto large‑screen displays. This makes the complete high‑definition system more accessible to traditional security system integrators. Nevertheless, power supply selection is critical during SDI‑camera installation. What key points should be kept in mind when choosing power supplies for SDI cameras? The specialists from Kaimorui give the following tips:

Points to note for power‑supply selection of SDI cameras:

1. For outdoor‑deployed SDI cameras, use dedicated waterproof surveillance power supplies designed for outdoor applications.
2. Place low‑wattage power supplies as close to SDI cameras as possible to avoid unnecessary electric‑power losses.
3. For long‑distance surveillance scenarios, higher‑voltage power supplies (such as 30 V or 36 V) shall be adopted. Alternatively, 220 V AC power can be transmitted to the front‑end site and then converted to the required operating voltage on‑site.
4. Do not connect cameras with vastly different cable lengths to one single power unit. If distant and nearby cameras share the same power supply, over‑voltage will burn out the nearby cameras, while under‑voltage will result in no video output from distant cameras. Therefore, cameras with similar transmission distances should be grouped and powered by the same power supply unit.

To sum up, these are the major considerations for selecting power supplies for SDI cameras. It should be noted that SDI cameras do not share universal power‑supply specifications. Power‑supply selection depends on the physical distance between SDI cameras and the control host. Users should select appropriate power supplies according to their actual application requirements.