Dahua SD8A840WA-HNF, Installation Manual

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1
1 Installation Preparation
1.1 Basic Requirement

All installation and operation here should conform to your local electrical safety codes.

Make sure if the application location of the speed dome conforms to the installation
requirements. Please contact your local dealer if there is any confusion.

Please use the product according to the environment.

Please take good care of the original packing material after unpacking the product, use the
original packing material to pack the speed dome and send it back for repair in case
problems arise.
1.2 Installation Check

Please make sure the installation environment has enough space to install the speed dome
and its corresponding bracket.

Please make sure the ceiling, wall and the bracket can support the speed dome and its
corresponding installation component. It shall sustain the 8X weight of the speed dome and
its mounting components.

Please make sure the wall is thick enough to install expansion bolts (users need to prepare
by themselves).

It needs to guarantee that the installation height is required to be more than 6m if it is a laser
speed dome.
1.3 Cable Preparation
Please select the min specification requirement of cable and video coaxial cable according to the
transmission distance.
1.3.1 The Min Specification Requirements of Cable

75 ohm impedance.

Full cable with copper conductor

95% knitted copper shield

Please refer to appendix 2 for more information about RS485 communication cable.
International Model Max Distance
(Ft\M)
RG59/U 750ft (229m)
RG6/U 1,000ft (305m)
RG11/U 1,500ft (457m)
Note
The above can be applied to analog speed dome and network speed dome.
1.3.2 Select Power Supply Cable According to Transmission Distance
Refer to appendix
Ⅲ
for AC 24V power supply device.