10
Installation
Star-Connection-
The star-form connection is most commonly used. It enables the connection of different dome
cameras with longer cable runs. It is recommended to use an RS485 distributor to ensure the
telemetric data transmission.
The advantage of the star-connection is that every channel can work independently and can
take a cable length up to 3,280 feet (1000 meters) (depending on cable quality). In cases where
more dome cameras are installed, the star-connection can be extended with additional RS485
distributors.
Video Cable-
Coaxial cable with 75Ω impedance with copper conductor at center conductor, and shielded
with 95% copper. The following table shows different cable type and its maximum length:
If the cable length is more than 1,312ft (400m), it is recommended to use optional accessories,
such as a video amplifier or twisted-pair video converter, for boosting the video signal.
Cable Standard
Max. Distance (m / ft)
RG 59 / U
750 ft / 229m
RG 6 / U
1000 ft / 305m
RG 11 / U
1500 ft / 457m
RS 485+
RS 485-
120Ω
Resistor
120Ω
Resistor
Device 1
Device 2
Device 3
System Keybo
ard
VER34<01>
Termination ON
RS 485+
RS 485-
Termination OFF
Termination OFF
Termination ON
System Keyboar
d
VER34<01>
RS-485 Distributor
Video Amplifier (optional)
DVR
Monitor
(optional)
DVR
(optional)
Up to 750m, coaxial cable
Balun Transmitter
(optional)
DVR
Monitor
(optional)
DVR
(optional)
Up to 1200m, twisted pair or cat5 cable
Balun Receiver
(optional)
The values are for reference only. Depends on the cable
quality and environmental conditions, the transmission
distance might be less.
RS 485+
RS 485-
120Ω
Resistor
120Ω
Resistor
Device 1
Device 2
Device 3
System Keyboard
VER34<01>
Termination ON
RS 485+
RS 485-
Termination OFF
Termination OFF
Termination ON
System Keyboard
VER34<01>
RS-485 Distributor
Video Amplifier (optional)
DVR
Monitor
(optional)
DVR
(optional)
Up to 750m, coaxial cable
Balun Transmitter
(optional)
DVR
Monitor
(optional)
DVR
(optional)
Up to 1200m, twisted pair or cat5 cable
Balun Receiver
(optional)
Extend connection distance
with video amplifier
Extend connection distance with
Twisted-Pair video converter
RS 485+
RS 485-
120Ω
Resistor
120Ω
Resistor
Device 1
Device 2
Device 3
System Keyboard
VER34<01>
Termination ON
RS 485+
RS 485-
Termination OFF
Termination OFF
Termination ON
System Keyboard
VER34<01>
RS-485 Distributor
Video Amplifier (optional)
DVR
Monitor
(optional)
DVR
(optional)
Up to 750m, coaxial cable
Balun Transmitter
(optional)
DVR
Monitor
(optional)
DVR
(optional)
Up to 1200m, twisted pair or cat5 cable
Balun Receiver
(optional)