How to Choose the Correct Power Supply and DC Power Cable for Your CCTV Camera
CCTV camera power supply configuration, what is the most taboo? What other issues need to pay attention to in the network camera power supply and DC power cable? Note when installing the camera!
Security monitoring system power supply mode, including three main power supply modes.
First, the Independent power supply mode
Second, the centralized power supply mode
Three, POE power supply mode (4 POE power supply mode)
Contents
First, CCTV Camera use independent power supply mode
The benefits of an independent power supply
Independent power supply refers to installing an independent security monitoring power supply in the front of each camera. This security monitoring power supply is only for a camera to provide a power supply.
The Independent power supply principle diagram is as follows.
1. Simple inspection and repair, easy to replace the power supply
Because each camera has an independent security monitoring power supply, you can quickly troubleshoot the faulty camera in the event of a camera failure. If you check the failure caused by the security monitoring power supply, only a single faulty power supply for repair and replacement.
2. To avoid the phenomenon of surveillance system paralysis
Centralized power supply mode of the power supply system once the problem, and did not use UPS, will lead to the entire monitoring system not working properly, into a paralyzed state. In the independent power supply mode, due to the failure of the security monitoring power supply, a single or several cameras can not work to avoid the phenomenon of paralysis of the monitoring system.
The shortcomings of independent power supply
1. The cost is too high
The sum of the cost of multiple independent security monitoring power supplies is generally higher than the same power output of the centralized power supply. This cost does not include the cost of a DC power cable.
2. Encounter higher chances of external damage
Because independent security monitoring power supply is often closer to the camera if it is in outdoor conditions, more likely to suffer from sun and rain, lightning strikes, and other external damage factors. Therefore, the choice of outdoor dedicated independent security monitoring power supply, especially to focus on the independent security monitoring power protection performance.
Second, CCTV cameras use a centralized power supply mode.
Connect a 12V centralized power supply at 220V power supply, and then connect 2*1.0 red and black power cables to the camera, respectively. The 12V power supply distance should not exceed 100 meters. Connect a single DC power extension cable and connect the single power cable connector and the surveillance camera power connector. Centralized power supply mode uses a 12V switching power supply in the monitoring room or some intermediate point to supply power to the front-end load centrally. Compared with the independent power supply mode, the biggest difference is that one power supply can provide a power supply for multiple cameras.
The principle diagram of centralized power supply.
The role of centralized power supply
Datacenter management objects mainly include two major parts of the infrastructure and IT infrastructure, such as power distribution, network equipment, security, etc…
The purpose of centralized monitoring is to be able to monitor the operation of infrastructure and IT infrastructure through the application of management and technology to achieve real-time detection and notification of faults and abnormalities; in addition, monitoring data can be collected and organized to provide the basis for analysis of capacity management, event management, problem management, and compliance management to ultimately achieve the goal of high availability in the data center.
Advantages of centralized power supply
1 Lower cost
Although the cables used in the centralized power supply mode are often more than those used in the independent power supply mode, the cost of the power supply system using the centralized power supply mode is often the most cost-effective power supply system due to the high-cost performance of the centralized power supply.
2 Simple centralized maintenance
A centralized power supply mode is convenient to lay lines, easy to construct, and easy to manage.
3 Low overall energy consumption
The actual engineering cases prove that the total energy consumption of the centralized power supply system is lower than that of the independent power supply system.
Disadvantages of centralized power supply
1, the front configuration is complex
Surveillance cameras require a large start-up power supply at the moment of start-up. The long-distance power transmission will generate losses, so the power of the centralized power supply is not the sum of all surveillance cameras’ power. Taking the centralized power supply mode, the engineer needs to understand the entire monitoring system to make a reasonable plan.
(In fact, because the camera is in the moment of start-up, the start-up current is very large, coupled with the loss of long-distance engineering transmission, so the power supply required for surveillance cameras does not simply add up the rated power of all cameras. (The correct approach is to add up the rated capacity of the entire surveillance system cameras and then multiply by 1.3 times, this is the actual power required by the camera, and then add about 30% of the loss; and finally add a 30% margin, as future expansion use.)
2, there is the possibility of monitoring the system paralysis phenomenon
No UPS power supply mode of centralized power supply system once the problem, will lead to the entire monitoring system can not work properly, into a state of paralysis.
Three, POE power supply
POE power supply mainly has the following four ways.
1, the switch and terminal both support POE
In this method, PoE switches directly through the network cable to support PoE power supply wireless AP and network cameras. This method is the simplest, but we also need to pay attention to the following two points.
â‘ determine whether the PoE switch and wireless AP or network camera is a standard PoE device
â‘¡To carefully confirm the specifications of the purchased network cable, the quality of the cable is critical; poor quality cable will cause the APC or IPC can not be powered or constantly reboot.
The principle diagram is as follows.
2, the switch supports POE, but the terminal does not support POE
In this program, PoE switches out to connect PoE separator, PoE separator will be separated into data signal and power, there are two output lines, one is the power output line, one is the network data signal output line that ordinary network cable. The power output has 5V/9/12V, etc. It can match various DC input non-PoE powered terminals and supports IEEE 802.3af/802.3at standard. The data signal output cable, i.e., the ordinary network cable, can be directly connected to the network port of the non-PoE powered terminal.
The schematic diagram is as follows.
3, the switch does not support POE; the terminal supports POE
This scheme switches out to a PoE supplier, PoE supplier will add power to the network cable after transmission to the terminal. This solution is conducive to the expansion of the original cabling network and has no impact on the original network.
The principle diagram is as follows.
4, switch and terminal do not support POE
This scheme switches out to the PoE power supply and then connects to the PoE splitter, and finally transmits to the terminal. Program three and four are suitable for the transformation of the traditional network; that is, the original switch does not support the PoE power supply but also want to use the benefits of PoE power supply occasions.
The schematic diagram is as follows.
How to connect PoE power supply
That the actual application, the network cable should be how to connect it, many friends understand the POE power supply technology, know 1 2 3 6 or 4 5 7 8 and other power supply line sequence problems, so afraid that in case of a wrong connection, resulting in serious consequences such as equipment burn.
POE power supply standard for POE switch, POE power supply module (POE power supply), and other PSE equipment requirements is as long as the support of 1 2 3 6 and 4 5 7 8 power supply line sequence of one can, of course, the latest 802.3at 4pair standard requires two kinds of simultaneous support. The requirement for POE powered devices is to support both power supply methods.
Four, independent power supply and centralized power supply; how to choose
How to choose between an independent power supply and a centralized power supply
The advantages and disadvantages of independent power supply and centralized power supply mode are rough as above, how to choose, depending on the actual installation environment and customer requirements. Generally speaking, the following 4-channel monitoring system using an independent power supply is appropriate. 4-channel to a 16-channel monitoring system, if the distance is comparable, it is recommended to choose the centralized power supply mode. 16-channel monitoring, you can use a combination of multiple centralized power supplies, provided that the pre-configuration must be done.
Example
If a business building has 100 fixed gun-type network cameras, each camera power rating is 4W, how do we configure the camera power? According to the above calculation method, we calculate that the rated power of the camera is 4W * 100 = 400W, and the actual power used by the camera is 400W * 1.3 = 520W. After considering the loss, the power required by the camera is 520W * 1.3 = 676W Plus, the power supply margin, the camera finally needs to configure the power supply power is 676W * 1.3 = 878W.
Summarized as follows.
The camera needs to configure the power supply power = the rated power of the camera * 1.3 * 1.3 * 1.3 (Note: If the monitoring distance is particularly long, you need to appropriately increase the power supply power and increase the supply voltage).
Network camera power configuration, the most taboo what?
The reasons are as follows.
1) system maintenance often needs to open and close the power supply. All the cameras in the open power instantly start at the same time, the start current is particularly large, the impact on the power supply is very large, and serious will burn the power supply.
2) all the cameras share a power supply; when the power supply fails, the whole closed-circuit monitoring system into paralysis.
Especially the images of some important entrances and exits can not be monitored, which may cause unnecessary trouble.
Then the correct approach should be how? As in the above example, a business building has 100 fixed cameras, a total of about 800W power supply; the correct configuration should be selected four, each 200W power supply. In this way, when a power supply fails, the important entrance and exit cameras can be connected to other good power supplies, not affecting the whole system’s work.
Where To Buy DC Power Cable?
We hope this how to choose power supply for CCTV camera full guide provides everything you need to know about the Network camera power supply you need. Our objective in providing this information was simple: Whether it’s a power supply that you need, a DC power cable, a DC power extension cable, or a DC power splitter cable that you’re looking for – this information should help you.
It’s now time for you to source the right power supply and DC power cable for your application. But, before you ask yourself: Where is the best place to buy a DC power cord near me – and rush to place an order, consider the following:
Who the DC power cable manufacturers and suppliers is?
Are they experienced?
Have they been in the DC power cord business long?
Do they have the expertise and knowledge to produce high-quality products?
Here at DelightFire, we have vast experience manufacturing and supplying some of the best DC power supply cables in the industry. Our well-respected production process and extremely diligent quality assurance standards ensure our products are of the highest quality available on the market.
Of course, when you’re looking to buy the best DC power supply cables in the business, one factor always matters Pricing! At DelightFire, we’ve made it a point to make quality and professionalism a hallmark of our business. While many of our other peers and competitors in the DC power cable industry link lower prices to cheaper quality. But we are different. You’ll find value for money when you buy or custom your cables from us.
