Dahua Technology LE-L - Manual (Page 28)

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After completing HDD installation, please check connection of data ribbon and power cord.
3.3.2 2 HDD Series
This series DVR supports 2 HDDs. Please use HDD of 7200rpm or higher. It has no requirement
for HDD capacity.
You can refer to the appendix for recommended HDD brand.
Please follow the above steps (chapter 3.3.1) to install the HDD.
3.4 Rack Installation
The DVR occupies 1.5 rack units of vertical rack space.
z
Use twelve screws to fix the unit
z Please make sure the indoor temperature is below 35℃ (95°f).
z Please make sure there is 15cm (6 inches) space around the device to guarantee sound
ventilation.
z Please install from the bottom to the top.
z If there are more accessories connected in the rack, please take precaution measures in
case the rack power is overload.
3.5 Connecting Power Supply
Please check input voltage and device power button match or not.
We recommend you use UPS to guarantee steady operation, DVR life span, and other peripheral
equipments operation such as cameras.
3.6 Connecting Video Input and Output Devices
3.6.1 Connecting Video Input
The video input interface is BNC. The input video format includes: PAL/NTSC BNC（1.0V
B
P- P ，
B
75Ω. See
X283H283H283H
Figure 3-1.
X
The video signal should comply with your national standards.
The input video signal shall have high SNR, low distortion; low interference, natural color and
suitable lightness.
Guarantee the stability and reliability of the camera signal:
The camera shall be installed in a cool, dry place away from direct sunlight, inflammable,
explosive substances and etc.
The camera and the DVR should have the same grounding to ensure the normal operation of the
camera.
Guarantee stability and reliability of the transmission line
BTTTB
Please use high quality, sound shielded BNC. Please select suitable BNC model according to the
transmission distance.
If the distance is too long, you should use twisted pair cable, and you can add video
compensation devices or use optical fiber to ensure video quality.
You should keep the video signal away from the strong electromagnetic interference, especially
the high tension current.
Keep connection lugs in well contact
BTTTB