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4.INSTALLATION
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.
RS 485+
120
RS 485-
Ω
Resistor
Device 1
Device 2
Device 3
G35M provide integrated termination switch. It should be turned on when the dome
is installed as the last device. If the controller keyboard is used such as AU-KB3A,
you need also to turn on the termination on it. please refer to the keyboard's
manual for details.
Termination
Termination
Termination
on
off
off
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 (e.g AU-VC-
MC2088) to ensure the telemetric data transmission:
RS-485 cable
up to 1000m
per channel
AU-MC2088
RS-485
Distributor
Termination
AU-KB3N
activated on
Termination on
every end.
Video Cable
coaxial cable with 75
Ω
impedance with copper conductor at center conductor, and
shielded with 95% copper. The following table shows different cable type and its
maximum length:
7
Some products may not be available in your country, please contact our distributor for more details
120
Ω
Resistor
RS 485+
RS 485-
AU-KB3N
Termination on
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.
Cable standard
Max. Distance (m /ft )
RG 59 /U
229m / 750 ft
RG 6 /U
305m/ 1000 ft
RG 11 /U
457m / 1500 ft
If the cable length is more than 400 m, it is recommended to use optional
accessories, such as video amlifier(e.g AU-VD-1001) or twisted-pair video
converter (e.g. AU-TP02 or AU-TP08), for boost the video signal.
Up to 750m, coaxial cable
AU-VD1001
Video Amplifier
(optional)
AU-DVRN16/400
Real time DVR Center
Extend connection distance with
video amplifier
Up to 1200m, twisted pair or cat.5 cable
AU-TP02 or
AU-TP08
AU-TP08 transmitter
TP receiver
(optional)
(optional)
AU-DVRN16/400
Extend connection distance with Twisted-Pair
Real time DVR Center
video converter
Some products may not be available in your country, please contact our distributor for more details
4.INSTALLATION
The values are for reference only.
Depends on the cable quality and
environmental condition, the
transmission distance might be less.
AU-JD2102
High Res Monitor
(optional)
(optional)
AU-JD2102
High Res Monitor
(optional)
(optional)
8
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