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The design of CCTV security systems is simply to put together a number of components, such as cameras, VCR, cables, monitor, among others.

No technical training is required, nor a very complete knowledge of how each of the components works. But you do need to know what each of them does and what their requirements are.

In this guide, we will describe most of the common components of a CCTV, plus the complementary equipment, and provide guidelines for their selection.

The Main Components of a CCTV

These include the following.

CCTV Security Cameras


Naturally, the cameras themselves are a decisive component in a CCTV system. However, not all security cameras are the same and neither are their attributes. There are several security cameras on the market and depends on the users which one they select.

Among the most common types of cameras are bullet, dome, PTZ and POE cameras. Regardless of the type, the user must determine which one to purchase. Features to consider include:

  • Resolution
  • The power supply
  • Lens type
  • Mounting options
  • Night Vision 
  • Two-way audio
  • Movement detection

In general, security cameras can be installed quite easily. They can also be easily connected.


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The Digital Video Recorder as a Component of a CCTV


A CCTV surveillance camera kit can send digital or analog video to a receiving DVR recording system. The analog video takes two fields of the corresponding signal and constructs an image, which is then digitized and compressed. 

If the video going to the DVR is digital, it is usually compressed to save storage space. Various methods of data compression can be used offering varying degrees of performance, quality and storage economy.

DVRs can include a variety of features and capacities such as:

  • Installed software, such as video processing
  • Image protection and authentication techniques
  • Additional Recording Ports
  • Internal hard disk for video storage
  • Easy search and event location capability
  • Ability to record one or more camera inputs while performing video analysis
  • Removable hard disk for archiving purposes and ability to transfer data to expandable storage systems to free up recording space

The Monitor


The function of the monitors as a component of a CCTV is to display video images for viewing. The selection of the monitors is as important to the quality of the image as the selection of the cameras, lenses and other components in the image chain. 

The video monitor market offers several options, such as liquid crystal displays (LCDs) and LED displays with different sizes. System requirements will determine the type of monitor for each application.

Hard disk for Security Kit


Hard drive capacity is a key specification for systems without a network storage strategy, as the device’s hard drive will determine how many days of recording are left before the system starts recording over the oldest video. 

Data storage requirements will depend on the type of cameras connected to the DVR. Resolution, frame rate, motion detection features, image complexity and field of view (FOV) will also affect the availability of storage on the drive.

In the case of Wired Transmission

Wired surveillance camera kits use cables to connect the cameras to other CCTV components. Cable transmission can provide good quality video images with fewer instances of interference because the cables are shielded. 

The cameras can be located away from recording or monitoring equipment. Today, three types of cables are commonly used for wired CCTV systems:

  • Coaxial cables
  • UTP Cables
  • Fiber optic cables

Transmission over a public telephone network is not advisable for CCTV due to the cyber security problems associated with an open network; however, it is still used in some cases.

The Power Supply

Ideally, the components of a video surveillance system should have an internal regulated power supply; however, this feature is often eliminated to reduce cost. This is particularly likely with low-cost cameras. 

Power supplies are available that individually distribute regulated power to each camera from a central location. Connecting CCTV cameras requires the use of a power supply that provides the appropriate voltage and current for the project.

In state-of-the-art installations with analog cameras, the power supply is centralized and distributes power to all installed cameras.It is recommended to use a power supply with 80% of its maximum capacity to avoid any overload problem.

Infrared Illuminators

The infrared light from CCTV cameras provides the ability to create video or still images in low or no light situations. Infrared illuminators help extend the security camera’s night vision range by «filling in» areas of the images that the CCTV camera’s built-in LEDs may not reach. 

If your surveillance camera kit is capable of recording a large area at night, then an infrared illuminator will help you capture higher quality images.

Surveillance Area Notification Signs

CCTV signs are a legal requirement for any business that has CCTV implemented to warn people on the premises that CCTV cameras are in operation.

CCTV warning signs also act as a crime deterrent, highlighting that there is high security on the premises to prevent possible criminal activity. Operating CCTV signs should be placed near security cameras and be visible to the human eye. A range of styles and sizes are available that can be used for indoor or outdoor use.

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Componentes de un Sistema de Seguridad CCTV
Components of an Anran CCTV


Components of a CCTV System. Find out what they are
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Components of a CCTV System. Find out what they are
Design of CCTV security systems is simply to put together a number of components, such as cameras, VCR, cables, monitor, among others.
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