Hikvision currently offers three video door intercom systems: 2-Wire IP, 2-Wire HD and IP system. The choice of the right system for a customer can be dictated by two factors, which include functionality and the type of communication bus between devices. If the system is built from scratch, including wiring, it is best to use twisted pair and choose an IP system. This system is distinguished by the greatest functionality and immunity to interference. Due to network communication between devices and PoE power supply in accordance with the standard, the range of communication and power supply to devices is guaranteed up to 100 meters. The IP system allows, among other things, the construction of large and functional systems, control of two relays in the door station, integration with the monitoring system, remote operation via the Hik-Connect application and much more. If you want to upgrade an old intercom system with existing cabling and a simple or paired cable, you can use the 2-Wire IP or 2-Wire HD system. In both cases, the power supply and establishing communication between devices is done using two wires of the cable, but the systems are slightly different. The 2-Wire IP system is actually an IP system in which two wires of a simple or paired cable and a special distributor (switch) are used for communication between devices. The switch enables communication between connected devices and supplies them with 24 VDC voltage. The distributor has a web interface that allows it to be connected to a switch, router or directly to a computer for activation, IP address setting and configuration. Once activated, the system is basically no different from an IP system from the user's perspective. However, before selecting it, you should study in detail the installation requirements and communication ranges between devices, as they are different from those of a typical IP system. The latest video intercom solution from Hikvision is the 2-Wire HD system, which is a slightly different approach. Power supply and communication between devices is implemented via a two-wire bus using the DS-KAD7060EY G74828 main distributor and DS-KAD7061EY G74830 floor distributors. It is also possible to power monitors within a given premises from another monitor. The approach has also been changed in terms of configuring the addressing of the devices, which is carried out using DEC switches located on the rear of the door station and monitors. Once the addresses are properly set on the switches and connected to the power bus, the system is immediately operational. So there is no need to think about what IP address and premises number has been assigned to the monitor, because such configuration can be done directly at the premises before the monitor is installed, without the need for a PC. This system, thanks to the use of floor distributors and the ability to feed monitors from other monitors, is very flexible in terms of design. Additional configuration is possible when the door station is in Access Point mode and connected to it wirelessly using a smartphone or computer equipped with a WiFi interface. In the 2-Wire HD system, the voltage on the communication bus is 48 VDC and is not compatible with the 2-Wire IP system. This system has the ability to be operated remotely using the HikConnect app when the monitor is connected to the Internet via a WiFi interface, but it cannot be integrated into the monitoring system. When choosing it, too, you should pay attention to the installation requirements and communication ranges between devices.

The following table shows the communication range between individual devices depending on the type of cable (simple or paired) and the cross-section of the individual conductors. It is recommended that a maximum of two devices communicate in one cable. The maximum distance from the power distributor to the furthest monitor in the system must not exceed 200 meters. After starting the system, you can check the signal strength and thus the stability of the connection on the communication bus between the monitor and the distributor in the Settings -> General Settings -> Cable Detection tab.

Cable type	DS-KAD7061EY to DS-KAD7061EY	DS-KAD7061EY to Monitor	Monitor to Monitor	DS-KAD7061EY to DS-KAD7060EY	DS-KAD7060EY to DS-KAD7060EY-S	DS-KAD7061EY to Door station	Door station to Electric strike
UTP 5 x 0.2 mm2 AWG24	60 m	60 m	60 m	60 m	100 m	60 m	-
Paired 0.28 mm2 AWG23	60 m	40 m	40 m	40 m	80 m	40 m	30 m
Straight 0.5 mm2 AWG20	60 m	60 m	60 m	60 m	100 m	60 m	50 m
Straight 1 mm2 AWG20	60 m	60 m	60 m	60 m	100 m	60 m	50 m
Paired 1 mm2 AWG17	60 m	40 m	40 m	40 m	80 m	40 m	100 m
Straight 1 mm2 AWG15	60 m	40 m	60 m	60 m	100 m	60 m	100 m

 

3. Devices included in the 2-Wire HD system

Below is a list of devices currently belonging to the 2-Wire HD system with a brief description:

After purchasing new devices, it is worth checking whether the software installed on the devices (firmware) is up to date and whether devices of the same type have the same firmware version. Since the devices may have been in the warehouse for different periods of time and may come from different deliveries, firmware versions may vary. Hikvision is committed to providing the most functional and stable hardware possible, and therefore constantly releases updates for its devices. After purchasing the equipment, it is best to follow the steps described below. This will help avoid many problems during the installation. To make it easier for installers to go through this process, the data sheets for each device in the DIPOL range that can be updated contain links to the latest firmware versions for each device.

Updating the firmware of the is possible after enabling AP (Access Point) mode in the door station and logging in to it using a computer equipped with a WiFi interface. The latest firmware for the door station should be downloaded and unpacked beforehand and saved to the computer's hard drive. To activate the AP mode, press the left call button on the door station for 10 seconds. The activation of the mode is indicated by a short beep and the backlight blinking between the two available call buttons. This mode is active for 30 minutes with the option to extend it by the user (to manually end the AP mode, press the left call button for 15 seconds. The door station will signal this with a double beep and the backlight will stop flashing). Once the AP mode is activated, a new WiFi network named AP_ device serial number, will appear to connect to. Logging into the device is then possible after typing https://www.apv.com in the browser window and entering the login information (login: admin, password: given on the back of the device). To update the firmware, go to Maintenance and security -> Upgrade, indicate the path to the downloaded firmware called “digicap.dav” and select Controller as the type of device to be updated. After a successful update, you can perform a factory reset in Maintenance and security -> Backup and reset -> Restore all.

The indoor station can be updated directly from the monitor using its graphical user interface and a microSD card formatted to the FAT32 file system. The previously downloaded firmware must be extracted to the card so that only the file with the extension “digicap.dav” is left on it. Insert the card into the microSD slot of a monitor that is connected to the power bus and switched off. After inserting the card, press any button on the monitor and follow the instructions on the screen. After the update process is complete, a factory reset can be performed by going to Settings -> Advanced settings -> Configuration -> System maintenance -> Restore all.

The monitors can also be updated via the door station in the Manage devices tab after switching on the AP mode and logging in to the door station via a computer.

The single DS-KD7003EY-IME2/A G73647 door station supports up to 2,000 users, 16 slave stations and 99 indoor stations. It has 2 control outputs: LOCK1 20 V/4 A, designed to control an electric strike, and LOCK2 (NO/NC relay - 30VDC/1A) designed to control an entrance gate. The description of the decimal switches DEC, designed for initial configuration of the device, is presented below:

The DS-KH7300EY-WTE2 G74026 monitor is equipped with 2 two-wire ports: TWO-WIRE IN - designed for connection from the power distributor or from the TWO-WIRE OUT output of another monitor, TWO-WIRE OUT - designed for connection of another monitor. It also has a CALL FLOOR input which, when shorted to GND, triggers a gong signal in the monitor. The description of the decimal switches DEC, intended for initial configuration of the device, and mode switches, is presented below:

If the monitor is set to multi-family mode and there are extensions connected to the main monitor in a given apartment, all monitors will signal a connection when the given apartment is called, but only the main monitor will be illuminated. In Villa mode, all monitors can be illuminated when a call is made, but they require additional power. The Professional studio mode allows for automatic control of the LOCK1 output when a call is made.

Some common 2-Wire HD system layouts are shown below, along with tables showing the configuration of both door stations and monitors using DEC switches on the back of the devices. The full expandability of the system and the diagrams can be found in the operating instructions of the door station and monitor.

A DS-KD7003EY-IME2/A G73647 door station with a DS-KD-KP G73668 keypad and 5 DS-KH7300EY-WTE2 G74026 main monitors are connected to the DS-KAD7060EY G74828 power supply distributor, located in separate rooms numbered 1 to 5. Three additional monitors have been installed in each room as extensions from MxE1 to MxE3, which are powered from the main monitors. Below the diagram, there is a table with the configuration of the DEC switches (from 1 to 3 apartments) located on the back of the devices, together with the first extension for these apartments (MxE1). By analogy, this diagram and the configuration shown can be used to create systems from 1-subscriber with or without extensions, to larger systems.

	SB	M1	M1E1	M2	M2E1	M3	M3E1
DEC1	1	0	1	0	1	0	1
DEC2	0	1	1	1	1	1	1
DEC3	0	0	0	0	0	0	0
DEC4	0	1	1	2	2	3	3
DEC5	0	0	0	0	0	0	0
DEC6	0	-	-	-	-	-	-

 

Two DS-KD7003EY-IME2/A G73647 door stations with a DS-KD-KP G73668 keypad are connected to the DS-KAD7060EY G74828 power distributor. Four main monitors DS-KH7300EY-WTE2 G74026 are connected to the DS-KAD7061EY G74830 floor distributor in separate rooms numbered 1 to 4. Three additional monitors have been installed in each room as extensions from MxE1 to MxE3, which are powered from the main monitors. The floor distributor is connected to the power distributor, which allows the monitors to be powered and communication between all devices to be established. A maximum of 16 floor distributors can be connected to one power distributor. Below the diagram, there is a table with the configuration of the DEC switches (from 1 to 3 apartments) located on the back of the devices.

	SB1	SB2	M1	M1E1	M2	M2E1	M3	M3E1
DEC1	1	1	0	1	0	1	0	1
DEC2	0	0	1	1	1	1	1	1
DEC3	0	1	0	0	0	0	0	0
DEC4	0	0	1	1	2	2	3	3
DEC5	0	0	0	0	0	0	0	0
DEC6	0	0	-	-	-	-	-	-

 

A DS-KD7003EY-IME2/A G73647 door station with a DS-KD-KP G73668 keypad is connected to the DS-KAD7060EY G74828 floor distributor. Eight main monitors DS-KH7300EY-WTE2 G74026 are connected in a cascade to a floor distributor DS-KAD7061EY G74830 in separate rooms numbered 1 to 8. Each monitor has a 2-wire input and output, which allows for cascading up to 8 monitors. Note that even though the floor distributor has 4 outputs, only 1 output can be used in this configuration. The floor distributor is connected to the power distributor, which allows the monitors to be powered and communication between all devices to be established. Below the diagram, there is a table with the configuration of the DEC switches located on the back of the devices.

	SB1	M1	M2	M3	M4	M5	M6	M7	M8
DEC1	1	0	0	0	0	0	0	0	0
DEC2	0	1	1	1	1	1	1	1	1
DEC3	0	0	0	0	0	0	0	0	0
DEC4	0	1	2	3	4	5	6	7	8
DEC5	0	0	0	0	0	0	0	0	0
DEC6	0	-	-	-	-	-	-	-	-

 

Below, you will find the access paths for the most important functions used in the configuration process, both in the door station and in the monitor. The paths for the door station refer to the configuration after logging in with a computer in AP mode. The paths for the monitor refer to operation via the local graphical interface.

9. Operation with the HikConnect app

The 2-Wire HD video door intercom system can be operated with the HikConnect app. To use this functionality, enable the WiFi interface on the monitor and connect to a WiFi network with Internet access. Then go to the Settings -> tab in the monitor Advanced settings -> Configuration -> System maintenance -> Hik-Connect service settings and enable the service, sending the verification code at the same time. Once the ‘Connected’ status appears, it will be possible to operate using the HikConnect application (you must first install the HikConnect application, create an account and log in to the application using these details). Monitor the app can be added by scanning the QR code available when the service is activated or by entering the serial number of the monitor.

Below are the access paths to the location where devices can be reset to factory settings.