4.INSTALLATION
4.INSTALLATION
Video Cable
coaxial
cable with 75 impedance with copper conductor at center conductor, and
shielded with 95% copper. The following table shows different cable type and its
maximum length:
Ω
The values are for reference only.
Depends on the cable quality and
environmental condition, the
transmission distance might be less.
RG 6 /U
Cable standard
RG 11 /U
229m / 750 ft
Max. Distance (m /ft )
305m/ 1000 ft
457m / 1500 ft
RG 59 /U
If the cable length is more than 400 m, it is recommended to use optional
accessories, such as video amlifier or twisted-pair video converter , for boost
the video signal.
Video Amplifier
(optional)
Real time DVR Center
(optional)
High Res Monitor
(optional)
Up to 750m, coaxial cable
Extend connection distance with
video amplifier
TP receiver
(optional)
Real time DVR Center
(optional)
High Res Monitor
(optional)
Up to 1200m, twisted pair or cat.5 cable
Extend connection distance with Twisted-Pair
video converter
transmitter
(optional)
The PTZ cameras provide integrated termination switch. It should be turned on
when the dome is installed as the last device. If the controller keyboard is used,
you need also to turn on the termination on it. please refer to the keyboard’s
manual for details.
RS-485Termination
Devices using Rs485 control are usually connected in daisy-chain. which reqiuers
termination with 120
Ω
resistor on both ends. Following picture illustrates the
connection methods. please note that a daisy-chain connection type shall not
exceed 7 meters.
120
Ω
R
esistor
Device 2
Device 3
Device 1
120
Ω
R
esistor
RS 485+
RS 485-
RS 485+
RS 485-
Termination
on
Termination
off
Termination
off
How to turn on termination on the high speed dome camera
The termination switch is located on the rear side of the connection board. For
switching on, you need to open the
Star-Connection
The star-form connection is mostly used. it enables the connection of different dome
cameras in longer distance. It is recommended to use RS-485 distributor to ensure the
telemetric data transmission:
The advantage of star-connection is
that every channel can work
independently and take a cable
length up to 1000 meters( depends
on cable quality). In case more
dome camera are installed, the star-
connection can be extended with
additional RS-485 distributors.
Some products may not be available in your country, please contact our distributor for more details
1
2
3
Term. Off ( default)
Term. On
1
2
3
ON
ON
OFF
OFF
ON
ON
Jumper
Termination
Jumper
rear side
How to open the connector board
The connector board can be easily
opened by holding the metal clip and
pull.
Press the metal
clip in and pull
the board on this
direction.
Metal
Clip holder
Some products may not be available in your country, please contact our distributor for more details
7
8
Termination on
Termination on
RS-485
Distributor
RS-485 cable
up to 1000m
per channel
Termination
activated on
every end.
