Closed-circuit surveillance cameras | CCTV system power supply selection characteristics of the closed-circuit surveillance cameras, closed-circuit monitoring system power supply selection? 1, the camera marked DC12V/AC24V GM, the choice of what kind of power supply? A: Select AC24V monitoring power, because the same transmission distance, the higher the voltage, the smaller the loss. High voltage, the load will be able to get sufficient voltage. AC 24V when debugging camera, you can select the power synchronization frequency to keep pace, so that different devices throughout the monitoring system of the image field. 2, the power of the configuration of the closed-circuit surveillance cameras, the most taboo what? A: The greatest taboo: the whole monitoring system share the same power supply (which is often said that centralized power supply). The following reasons: 1) system maintenance, often need to turn on and turn off the power. All the cameras start at the moment the power is turned on at the same time, start-up current is particularly large impact on power, will burn serious power, 2) all of the surveillance cameras share a single power supply, when the power supply fails, the entire closed-circuit monitoring system paralyzed. Especially some important entrances and exits of the image can not be monitored, may cause unnecessary trouble. 3, how rational allocation of the monitoring system as a whole closed-circuit surveillance cameras Power? A: This question is often so young and not experienced engineers make things difficult for a lot of program implementation found that the original design of the power supply capacity is not enough, the need for additional equipment, resulting in passing phenomenon and Party. In fact, the camera at the moment of starting, the starting current is large, long-distance transmission losses plus engineering, monitoring cameras need the power, not simply added to the rated power of all the closed-circuit surveillance cameras. The correct approach is to sum the rated power of the camera monitoring system as a whole and then multiplied by 1.3 times, and this is the actual needs of the power of the camera, and then coupled with the loss of about 30%; final plus a margin of 30%, as future expansion use. 4, the choice of the closed-circuit surveillance cameras power also need to pay attention to what issues? A: First: when the power supply is connected to the camera, not the distance of the camera and closer surveillance cameras connected to the same power. If connected to the same power supply voltage is high, the camera will be burned up close, low supply voltage, distance camera images. Should be more distant from the surveillance cameras connected to the same power, the closer the camera is connected to the same power. Second: If the monitor is too far away, you need to configure a higher voltage power such as 30V, 36V, and so on, or even directly for 220V AC power to the front end and then the transformer. The CCTV camera RS-813HR Features: ★ 1/3 "SONY Super HAD II the CCD ★ ultra-low power consumption through rigorous electromagnetic interference testing ★ 100dB wide dynamic range is only 60mA current ★ ★ digital noise reduction ★ icon menu type OSD control camera functions ★ standard 5-button control OSD CCTV cameras Technical parameters: Sensor: 1/3 "SONY SUPER HAD II CCD level resolution: 600TVL pixels: PAL: 753 (H) * 582 (V), NTSC: 768 ( H) * 494 (V) Image Format: PAL / NTSC synchronization mode: Internal γ correction 0.3 - 1.0 Setting the signal-to-noise ratio:> 50dB (AGC OFF) Electronic shutter speed: PAL: 1/50-1/100, 000sec; NTSC : 1/60-1/100, 000 automatic gain: OFF ~ 33dB Minimum illumination: 0.05Lux/F1.2 video output: 1.0Vpp 75 ohm BNC output CCTV camera power supply: 12V DC (± 10%) lens drive: Board lens Fixed lens optional / DC drive function control: OSD PCB Size: 279mm * 88mm * 84mm Operating Temperature: -10 ° C ~ 50 ° C working environment: from 10% to 90% of the Company: Shenzhen Laocoon Electronics Co., Ltd. Contact: Liu Kun China Tel :0755 -27,865,266 Mobile Number: 18320895213 Toll Free :400-022-6828 Website: http://www.szjrse.com; http://jrse2012.wjw.cn Address: Shenzhen Baoan District 71 District Liuxian all the way to the 14th G the third floor of the CCTV camera | CCTV system power supply selection characteristics | CCTV camera