Dahua TPC-BF2120-1F4, Быстрый старт, Страница: 15 / 24

5
3 Device Installation
3.1 Preparation before Installation
3.1.1 Check Installation Space and Intensity
Make sure the installation site has enough space to hold the device and its mounting structural components.
Please make sure the ceiling and wall where the bullet is installed can sustain at least 8x weight of bullet
and its mounting structural components.
3.1.2 Cable Preparation
Select Needed Power Cable
It is recommended to implement according to the following requirements when the users need to lengthen
the power cable.
Max. Transmission distance is recommended when the size of wire diameter is fixed and DC 12V voltage
transmission power is 15. Please refer to the following table for more details.
Wire Diameter (mm) Max. Distance (Feet/M)
0.800
40.71
（
12.41
）
1.000
63.61
（
19.39)
1.250
99.39
（
30.29
）
2.000
254.44
（
77.55
）
Table 3-1
Select Needed Signal Cable
All signal cables (audio, alarm input and output and RS485 etc.) are recommended to use 0.56mm (24AWG)
and above cable as lengthened wire signal cable.
Select Needed Video Cable

75 ohm.

Full cable with copper conductor.

95% knitted copper shield.
International Model Max Transmission Distance
(Ft\M)
RG59/U 750Ft/229M
RG6/U 1,000Ft/305M
RG11/U 1,500Ft/457M
Table 3-2
3.2 Installation Steps
Warning

The mounting surface has to sustain 8X weight of camera, which is to avoid the camera falling. It shall
avoid device, parts and tools etc. falling from high altitude during installation, in case it may hurt people
and damage other objects, destroy device and drop parts.

Please cut off the device power before installing Micro SD card.