2.4 Rear panel
4-CH rear panel diagram schematic, please mainly in kind

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8-CH rear panel diagram schematic, please mainly in kind
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16-CH rear panel diagram schematic, please mainly in kind
cctv dvr, ip dvr, vision cam dvr, network dvr

No. Physical interface / logo ID Description
1 VIDEO IN Video input connector, 4-CH two rows of two of four, 8-CH two rows of four of eight, 16-CH two rows of 8 of 16
2 GND Ground column for ground use DVR
3 VIDEO OUT Video output, then the monitor, or other TV equipment
4 AUDIO-IN Audio in
5 AUDIO-OUT Audio out
6 Power switch Power switch, hit the dot at the start
7 NET/LAN Network Interface
8 RSS232 Serial Interface
9 DC-12V 12V Power Interface
10 VGA VGA display interface (optional)
11 USB1 BACKUP USB interface (can be used for U-disk backup or mouse)
12 USB2 COLSE Spare USB port, unopened
13 ALARM Alarm input and output interface, PTZ interface, etc. (see Alarm Interface specific description)

Note: The rear panel of the USB interfaces, on the one after the mouse, the next one after storage devices. The mouse, such as access to the next USB port, the mouse control will lead to an exception.

2.5 Audio and video input and output connections

2.5.1 Video input connections

The video input port is BNC connector plug. The demand of input signal is PAL/NTSC BNC(1.0VP-P,75Ω).
The video signal must be accorded with the state standard, which has the high signal to noise ratio, low aberration and low interference. The image must be clear and has natural color in the appropriate brightness.
Insure the Videocon signal stable and credible
The Videocon should be installed in the appropriate location where is away from backlighting and low illumination or adopts the better backlighting and low illumination compensation.
The ground and power supply of the Videocon and the DVR should be shared and stable.
Insure the transmission line stable and credible
The video transmission line should adopt high quality coaxial pair, which is chosen by the transmission distance. If the transmission distance is too far, it should adopt shielded twisted pair, video compensation equipment and transmit by fiber to insure the signal quality.
The video signal line should be away from the electro magnetic Interference and other equipments signal lines. The high voltage current should be avoided especially.
Insure the connection stable and credible
The signal and shield lines should be firm and connected credible which avoid false and joint welding and oxidation.

2.5.2 Video output connections and options

The video output is divided into PAL/NTSC BNC(1.0VP-P,75Ω) and VGA output(selective configuration).
When replace the monitor by the computer display, there are some issues to notice.
1、Do not stay in the turn-on state for a long time.
2、Keep the computer display normal working by demagnetizing regularly.
3、Stay away from the electro magnetic Interference.
TV is not a credible replacement as a video output. It demands reducing the use time and control the power supply and the interference introduced by the nearby equipments strictly. The creep age of low quality TV can lead to the damage of other equipments.

2.5.3 Audio signal input

Audio port is BNC connection.
The input impedance is high so the tone arm must be active.
The audio signal line should be firm and away from the electro magnetic Interference and connected credible which avoid false and joint welding and oxidation. The high voltage current should be avoided especially.

2.5.4 Audio signal output

Commonly the output parameter of DVR audio signal is greater than 200mv 1KΩ(BNC), which can connect the low impedance earphone and active sound box or other audio output equipments through power amplifier.  If the sound box and the tone arm can not be isolated, howling phenomena is often existed. There are some methods to deal with the above phenomena.
1、  Adopt better directional tone arm.
2、  Adjust the sound box volume to be under the threshold that produces the howling phenomena.
3、  Use fitment materials that absorb the sound to reduce reflection of the sound.
Adjust the layout of the sound box and the tone arm.

2.6 Alarm input and output connections

1、Alarm input

  1. Alarm input is grounding alarm input.
  2. Alarm input demand is the grounding voltage signal.
  3. When the alarm is connected with two DVRs or connected with DVR and other equipments, it should be isolated by relay.

2Alarm output
Alarm output can not be connected with high-power load (no more than 1A). When forming the output loop it must prevent the big current from relay damage. Use the contact isolator when there is a high-power load
3PTZ decoder connections
A. The grounding of the PTZ decoder and DVR must be shared otherwise the common-mode
voltage will lead to the PTZ control failure. The shielded twisted pair is recommended.
B.  Avoid the entrance of high voltage. Make the layout reasonably. Take precaution from the

  1. In the outlying end connect 120Ω resistance paralleled to reduce the inflection and insure
  2. the signal quality.

D.   The 485 AB lines of DVR can not connect with other 485 output equipments paralleled.
E.        The voltage between the AB lines of the decoder must be less than 5V.
4Front equipment grounding note
Bad grounding can lead to the burnout of the chip.
5Alarm input type unlimited
The DVR alarm output port is constant opening type.



16-CH Alarm Terminal
(1)RS485 (2)Alarm output 1
(3)GND (4)Alarm output 2
(5)Alarm input 8 (6)Alarm input 1—4
(7)GND (8)Alarm input 5—7
4/8-CH Alarm Terminal
(1) Alarm input 1 (2)GND
(3) Alarm output (4)RS485


Parameter Meaning
G Grounding
C1、NO1 Alarm output interface (constant open type)
A、B 485communication interface which is connected with the recording control equipments such as the decoder


2.6.1 Alarm input port specification

1 channels alarm input. Alarm input type unlimited.
The grounding and the com port of the alarm sensor are parallel (The alarm sensor is external power supply).
The grounding of the alarm and the DVR should be shared.
The NC port of the alarm sensor must be connected with the DVR alarm input port.
The grounding of the power supply and the alarm sensor must be shared when used in external power supply.

2.6.2 Alarm output port specification

1 channels alarm output. There is external power supply when using the external alarm equipment.
Please refer to the relay relevant parameters to avoid the overload that damages main machine.

2.6.3 Alarm output port relay parameters

Interface material Silver
(resistance load)
Rating switch capacity 30VDC 2A, 125VAC 1A
Maximal switch power 125VA 160W
Maximal switch voltage 250VAC, 220VDC
Maximal switch current 1A
Isolation Homo-polarity interface 1000VAC 1minute
Inhomo-polarity interface 1000VAC 1 minute
Interface and winding 1000VAC 1 minute
Surge voltage Homo-polarity interface 1500VAC (10×160us)
Turn-on time 3ms max
Turn-off time 3ms max
Longevity Mechanical 50×106 MIN(3Hz)
Electric 200×103 MIN (0.5Hz)
Environment temperature -40~+70℃


2.7 Speed dome connections

1、Connect the 485 lines of the speed dome with the DVR 485 interface.

2、Connect the video line with the DVR video input.
3、Electrify the speed domes.

3 Basic operation

Note: The button in gray display indicates nonsupport.

3.1 Turn on

Plug the power supply and turn on the power supply switch. Power supply indicator light shining indicates turning on the video recorder. After the startup you will hear a beep. The default setting of video output is multiple-window output mode. If the startup time is within the video setting time, the timing video recording function will start up automatically. Then the video indicator light of corresponding channel is shining and the DVR is working normally.
Note: 1. Make sure that the input voltage corresponds with the switch of the DVR power supply.
2. Power supply demands: 220V±10% /50Hz.
Suggest using the UPS to protect the power supply under allowable conditions.

3.2 Turn off

There are two methods to turn off the DVR. Entering [main menu] and choosing [turn off] in the [turn off the system] option is called soft switch. Pressing the power supply switch is called hard switch.
1、Auto resume after power failure
If the DVR is shut down abnormally, it can automatically backup video and resume previous working status after power failure.
2、Replace the hard disk
Before replacing the hard disk, the power supply switch in the real panel must be turned off.
3、Replace the battery
Before replacing the battery, the setting information must be saved and the power supply switch in the real panel must be turned off. The DVR uses button battery. The system time must be checked regularly. If the time is not correct you must replace the battery, we recommend replacing the battery every year and using the same battery type.
Note: The setting information must be saved before replacing the battery otherwise information will lose.

3.3 Login

When turn on the DVR, the system will automatically to show the SYSTEM dvr loggin panel. cctv dvr, ip dvr,LOGIN interface, please sees the picture, then you can login under admin user name and the password is empty, the system provides the corresponding functions with the admin purview. There are another two user settings. The names are default and guest, the password of them is also empty.
Password protection: If the password is continuous wrong three times, the alarm will start. If the password is continuous wrong five times, the account will be locked. (After reboot or half an hour, the account will be unlocked automatically)
For your system security, please modify your password after first login. (4.5.2)

3.4 Preview

You can right click mouse to choose the switch between the windows.
The system date, time and channel name are shown in each viewing window. The surveillance video and the alarm status are shown in each window.

<table border=”1″ cellspacing=”0″ cellpadding=”0″>
<td width=”42″><p><strong>1</strong></p></td>
<td width=”49″><p><img width=”21″ height=”24″ src=”file:///C|/Documents and Settings/Bilal/Application Data/Adobe/Dreamweaver CS5/en_US/OfficeImageTemp/clip_image002_0000.jpg” /><strong> </strong></p></td>
<td width=”182″><p>Recording status</p></td>
<td width=”39″><p><strong>3</strong></p></td>
<td width=”52″><p><strong><img width=”24″ height=”24″ src=”file:///C|/Documents and Settings/Bilal/Application Data/Adobe/Dreamweaver CS5/en_US/OfficeImageTemp/clip_image003.gif” alt=”channel_state_vls” /></strong><strong> </strong></p></td>
<td width=”196″><p>Video loss</p></td>
<td width=”42″><p><strong>2</strong></p></td>
<td width=”49″><p><img width=”20″ height=”21″ src=”file:///C|/Documents and Settings/Bilal/Application Data/Adobe/Dreamweaver CS5/en_US/OfficeImageTemp/clip_image005.jpg” /><strong> </strong></p></td>
<td width=”182″><p>Motion detect</p></td>
<td width=”39″><p><strong>4</strong></p></td>
<td width=”52″><p><img width=”19″ height=”20″ src=”file:///C|/Documents and Settings/Bilal/Application Data/Adobe/Dreamweaver CS5/en_US/OfficeImageTemp/clip_image007.jpg” /><strong> </strong></p></td>
<td width=”196″><p>Camera lock</p></td>
Recording status 3
Video loss
Motion detect 4
Camera lock

Table 3.1 Preview icons