Commax intercom: connection, repair, popular models

Main models

Commax DVP-4HP – black and white video intercom with handset for 1 camera. Diagonal 4 inches, the ability to connect one calling panel, one additional handset, memory unit VM-64H for 64 frames, AC 100-220V, temperature range from -10 to +40.

Commax DVP-4MHT - black and white video intercom screen with handset for 2 cameras. Diagonal 4 inches, can be connected to an entrance intercom via interface blocks, connection of a memory unit and additional handsets is not provided, AC 100-220V, operating temperature from -10 to +40.

Commax CDV-71AM – color video intercom monitor without handset for 2 cameras. Screen 7 inches TFT LCD, connection of additional 2 calling units, 2 CCTV cameras, DP-4VHP handsets, built-in non-volatile memory for 128 frames, call and handset-monitor communication, picture-in-picture function, AC 110-240V , overhead version, operates at temperatures from 0 to +40.

The company produces devices of different types:

Driveways;
Analog and digital video intercoms;
Individual, used in offices or private homes.

The basic elements of the device are the same for all models, apart from the differences in the functional set.

Displays include TFT color matrix screens ranging in size from 3.5-10.2 inches.

Previously, they produced black and white video intercoms, which are still used in the places where they were installed. Today, monochrome matrices are outdated and are no longer used in the assembly of new Commax models.

Where special control is needed in areas, devices are installed that provide video surveillance from 2 to 4 channels. Additional calling panels or cameras are connected to such channels. New handsfree monitors make it possible to operate by simply pressing a button without using a speaking tube.

Connecting an additional video camera

The set of necessary cables for an additional video camera is standard. Differences can only occur if there is an additional microphone function.

To transmit the signal you need:

Common wire;
Video signal cable;
Power (12V);
Audio signal cable (if the video camera is equipped with a microphone);

To reduce possible risks of video signal interruption, a specialized cable should be used when connecting. Most often - KVK-P, intended just for these purposes. The cable transmits the signal and supply voltage to the video camera. It is carried out thanks to the presence of two stranded wires in a plastic housing KVK-P.

The ShVEP-4x0.12 option is also suitable. It includes 4 multi-core wires, one of which is directed to the screen, and the rest supply power to the camera and transmit audio.

If you plan to connect the video camera to the intercom with your own hands, then please note that you can carry it no more than 50 meters. Such actions will help avoid unwanted communication losses.

Although specific numbers are not strictly established. Indicators are determined in a practical way. But such averaged parameters will help eliminate errors in work.

In general, choosing a viewing area and connecting a camera is not a difficult process. The main difficulties lie solely in laying the cable. You can’t do this without possessing certain skills and special tools. The diagram for connecting a video camera to an intercom will help you understand some of the difficulties.

When installing the camera on a gate or fence, the cable can be run underground. In this case, a prerequisite is the use of a plastic or metal cable channel.

Connecting a 2MP AHD CCTV camera to a video intercom

Connection diagram

A video intercom is installed from the following elements:

call panel,
controller,
electronic lock,
12V power supply
and video cameras.

The principle of connecting elements together is quite simple. To protect a territory with two entrances, it is important to install an additional calling panel instead of a video camera. In almost all cases, a camera is installed instead of the second panel. This way you can see the visitor and decide whether to open the door or not.

The calling panel and camera are connected to the controller using four wires: audio, video, power and common. The input of the calling panel and the camera is supplied with a voltage of 12V, a transformed value. It is obtained as a result of changing the household unstable voltage of 220V by a power supply.

The design allows for the use of two electric locks, although you can leave only one or completely exclude it from the circuit.

If you decide not to install locks, then the wires must be insulated and hidden under the panel.

If a video camera is installed instead of the second calling panel, then the sound passes through one channel, and the image passes through the second. Most often, a video camera is installed right in front of the entrance to the home, and a call panel is installed in front of the entrance to a long corridor, after passing which the visitor finds himself in the lens frame.

If the house is large, often one intercom is not enough. In this case, you can connect a second one. We install one on the first floor, the other on the second.

Reviews of equipment and comments on the material

It is clear that repairs need to begin with its inspection and testing. With mains voltage V, full-wave rectification and the presence of a filter capacitor, it must be at least V. The calling panel and camera are connected to the controller using four wires: audio, video, power and common. Additional features In private houses with a large area and several handsets, the video intercom system can be used as an internal conversation.

Records can also be sent to your email or phone if a luxury model is installed.

Power must be applied while the power cord is plugged into an outlet. In almost all cases, a camera is installed instead of the second panel.

Most often, a video camera is installed right in front of the entrance to the home, and a call panel is installed in front of the entrance to a long corridor, after passing which the visitor finds himself in the lens frame. The photograph is taken in such a way that the visitor is not even aware of it. The calling panel and camera are connected to the controller using four wires: audio, video, power and common. It is difficult to find a replacement inductor, so we cut off the wires of the windings, count the turns, there are about

The pipe, in turn, reliably protects the connecting wires from external influences. How to connect an intercom

Connection procedure

The video intercom comes complete with an intercom, a color display and a calling unit, which is installed at the entrance to the building. To provide illumination at night, the calling unit is equipped with an infrared element. Each device is accompanied by a diagram according to which the equipment is connected and installed. For ease of connection, the wires differ in color. Red - audio signal. Blue is general. Yellow - 12 V power supply. White - video signal.

To avoid failure of the device, it is necessary to install the intercom at a distance of one meter from the calling panel. The intercom is installed on a wall or a stable surface if the device is portable. Do not install the intercom in rooms with high humidity, as this may lead to damage or short circuiting of the device.

Also, during a thunderstorm, you should turn off the device to avoid a short circuit or install lightning protection , since Commax devices are sensitive to lightning. The main basis of safety is the installation of grounding. If you replace the power plug of the device, it is necessary to install a similar element, since it has overload protection.

Devices should be installed at a height of one and a half meters so that children cannot reach them. Also, when connecting, you should take into account that excessive heating leads to damage. Therefore, under no circumstances should the device be exposed to direct sunlight .

You need to use a coaxial cable that is protected with a metal pipe. It will prevent magnetic fields from forming interference currents, which is the cause of a fictitious signal. This cable must be used when wires are located near high-voltage lines. The pipe, in turn, reliably protects the connecting wires from external influences. The cause of the fire may be a short circuit due to damage to the wire insulation. Therefore, it is important to monitor the integrity of the wiring.

To prevent equipment failure, it is necessary to maintain the order in which the wires are connected. Then, once all the elements have been connected, you should recheck the correctness of the connection. The most important thing is that the conductors are securely fastened and the order of the wires is not disturbed. Before connecting the monitor and camera, make sure that the monitor is not connected to the network. Power must be applied while the power cord is plugged into an outlet. Upon completion of installation, turn on the device and perform a control check of the functionality of all elements. Service Features+

Commax intercom is an alternative replacement for expensive electronic and unreliable mechanical combination locks.

The advantages of using it will be: the absence of unauthorized persons, cleanliness in the area, preventing the theft of letters and printed materials. However, using an intercom, in turn, has negative sides and technical limitations:

The consent of the majority of residents of the house or entrance is required;
The cost of equipment and installation work performed by professionals is quite high. Nevertheless, high-quality work and the materials used are the key to many years of trouble-free operation.
At the end of the warranty period, you will need to pay a monthly fee for maintenance and periodic maintenance to ensure that the equipment does not fail.

Read about the difficulties you may encounter when repairing this video intercom here.

Intercom connection.

The Commax intercom is connected using colored wires. Typically these are red, blue, yellow and white wires. It is important to maintain the connection order, as incorrect connections can cause equipment failure. In some cases, repair is not possible; the user has to purchase the equipment again.

The blue wire is common; the power potential is measured against it. Red – audio signal. Yellow is the positive bus of the main power supply of the equipment. White – video signal.

When connecting the equipment, it is necessary to ensure that the device is not exposed to direct sunlight. Excessive heat is the main cause of failure. It is better to place the elements at a height of one and a half meters; if there are children in the family, they will not be able to reach them. If connecting wires are laid close to high-voltage lines, then it is necessary to use a coaxial cable, which is protected by a metal pipe. This is the only way that magnetic fields will not create interference currents - and this can become one of the reasons for a false signal. The pipe, in turn, will reliably protect the connecting wires from external influences.

Additional features

In private houses with a large area and several handsets, a video intercom system can be used as an internal conversation.

The Commax intercom panel makes it possible to display the image from the video intercom on a television screen by connecting the TV to the appropriate interface.

Electromagnetic locks are able to operate for some time after a power outage by accumulating a small amount of charge. However, if there is a long shutdown, the entrance to the room will be unblocked and become free. Installing an additional mechanical lock will be the most suitable way out of this situation, and installing an uninterruptible power supply will ensure the operability of the system’s actuators for a day.

Most devices have a fairly small amount of internal memory, enough to save changes to current settings, but not enough to store video data over a significant period of time. For convenience, video intercom systems include memory cards. They can shoot and save from 128 frames . The photograph is taken in such a way that the visitor is not even aware of it.

The intercom has a function that allows you to record video of individual elements. The recording frequency is determined by the owner himself.

Suitable for people who are often away from home. Records can also be sent to your email or phone if a luxury model is installed.

To make full use of cameras, video surveillance systems are equipped with motion sensors. These devices begin recording when movement occurs within the video camera.

Another advantage of the products of the South Korean company COMMAX is the ability to combine an intercom into a modern “smart home” system. Such a combination will allow you to control not only access to the building and automatically open electric locks, but will also provide control of all electronics and household appliances in the house.

Interesting from ESpec

If there is no such rating, you can have two connected in series at the operating voltage V, but their capacity should be half as high. We change the fuse, set it to 2A, as indicated on the board next to it.

After bringing the first supply voltage B back to normal, let’s check the supply voltage of the microcircuit.

White - video signal. In brackets are the pin numbers of the microcircuit with 14 legs, without brackets - with 8.

This way you can see the visitor and decide whether to open the door or not. To avoid failure of the device, it is necessary to install the intercom at a distance of one meter from the calling panel.

Types of intercoms

Then, once all the elements have been connected, you should recheck the correctness of the connection. These devices begin recording when movement occurs within the video camera. We didn’t have a small diode bridge at hand, so instead we put 4 1N diodes. If there is no such rating, you can have two connected in series for the operating voltage V, but their capacity should be half as high.

To make full use of cameras, video surveillance systems are equipped with motion sensors. The capacitor charge current limiting thermistor installed in series in front of the diode bridge has a cracked body, but is not torn. After installing the repaired power supply, the video intercom was fully operational. If you decide not to install locks, then the wires must be insulated and hidden under the panel. The recording frequency is determined by the owner himself.

What you need to connect

To connect a video intercom you need to prepare the necessary equipment for work:

Monitor and wires for connection.
Power supply and electromagnetic lock.
Call panel.
Tools.

Next, we will talk in detail about each of the elements of the video intercom in more detail:

The power supply may or may not be included with the video intercom. Selecting a power supply is quite difficult, since it is necessary to calculate all the elements that will be powered by this device.

Lock. When connecting a video intercom, you should choose a lock from two possible options: electromagnetic and electromechanical. The main difference between these locks is that the electromechanical one is equipped with a conventional mechanical lock that operates using a drive, as opposed to an electromagnetic one that operates from electricity. The choice of a particular lock when manually assembling a video intercom should be determined by the conditions and requirements for the system. It is worth taking into account an important risk factor: electromagnetic locks become unreliable due to power failures due to their design features. An electromechanical lock does not cause such failures in the system, which is why such a lock is more in demand in private houses and cottages.

Monitor. An element of a system that transmits images and sounds of what is happening within the system's range.

Wiring. Wires play a big role when installing a video intercom system; the uninterrupted operation of the entire system depends on the quality of these elements. Wires must be insulated during installation. Experts recommend using a wire consisting of three cores: yellow - for video broadcasting; blue – for sound; and orange - for power (12 Volts).

Video intercom call panel. The main element of the entire system is the head, which records the actions of the remaining elements of the system.

The important role of the call panel is that it is the element that limits the possibility of entering the premises until the owner makes a decision whether to enter or not. Conclusion: the calling panel is the main element of the device, responsible for communication between the parties and identification of the visitor. Relay for video intercom operation at night

Tools. When installing the system, the following tools are required to complete the work: Screwdrivers, tester, multimeter, soldering iron, hammer drill, solder, drill, drills, drills.

how to connect a video intercom yourself (with your own hands)