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Connections for RS-485 type camera
There are two options to connect the camera with
the
Multiplexer,
depending
between them.
For data multiplexed type cameras, a maximum dis-
tance of 900 meters (3 000 ft) is the limit for using
coaxial cable such as RG-59/U, BELDEN 9259 or
equivalent.
If more distance is required, use cameras and
Multiplexers with RS-485 communication feature.
This will lower signal loss and extend the distance
as video signal and data are transmitted separately.
Note that you need to set up the communication
port as described on page 35 when using the RS-
485 feature.
Note: Recommended for RS-485 communication is
shielded, two-wire, twisted pair, low impedance
cable, AWG#22 or thicker.
(1) Connect with single RS-485 camera as shown
below, setting the LINE SELECT switch to "2" or "4".
WV-RM70 and others
TERM
ON
OFF
DATA
T(A) T(B) R(A) R(B)
GND
RS485
A B
A B
G
G
N
N
T
R
D
D
(A)
OFF
ON
(B)
GND
WV-CPR450 and others (For the
Termination Switch positions, refer
to the instruction manual for the
camera.)
RS485
A B
A B
G
G
N
N
T
R
D
D
on
the
distance
LINE
TERM.
SELECT
OFF
ON
2
4
WJ-FS616
LINE
TERM.
SELECT
OFF
ON
2
4
WJ-FS616
(2) Connect cameras in a Daisy Chain
1. Draw up a plan for connection between the cameras
and the input channels of the Video Multiplexer, and
the assignment of unit addresses to cameras.
Caution:
Check the settings of the camera addresses
when using cameras capable of RS-485 com-
munication. Operations from the Multiplexer will
not work if the camera addresses are set
improperly.
1. Do not use addresses other than 1 through 16
for individual cameras ("17" is not allowed).
2. Do not set a single address for more than one
camera in an RS-485 chain.
2. Set the LINE SELECT switch of the Multiplexer to
"2". Also set the switch of the connected equipment
if required.
3. Connect one end of the cable as shown to the RS-
485 terminal of the Multiplexer, and the other end to
the first camera in the chain. Repeat this procedure
for all cameras to the end of the chain.
4. Set the termination switches of the Multiplexer and
cameras at both ends of the chain to ON position.
Termination switches of cameras not at the chain
ends must be in OFF position.
Cautions:
• Termination is the key to data transmission and
reception in the chain. Only the switches at the
chain ends must be switched ON, while the
other switches are kept OFF.
• Response may slow gradually the higher the
equipment number in the chain.
The switch on a daisy-
chain-connected unit not
at the extremities must
be in the OFF position.
(A)
OFF
(B)
GND
RS485
A B
A B
G
G
N
N
T
R
D
D
-16-
The switch on the end
unit should be in the
ON position.
(A)
ON
OFF
ON
(B)
GND
WV-CPR450 and others
(For the Termination
Switch positions, refer
to the instruction
manual for the
corresponding unit.)
LINE
TERM.
SELECT
OFF
ON
2
4
WJ-FS616
Set it to
position 2
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