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TEMA TELECOMUNICAZIONI SRL
Doorphone AA-539
MAS-AA539-REV02EN
Page 28 of 57
8.3.4. Connection of the base system AA-539C with camera
In the system AA-539C is housed a camera
equipped with a video cable terminated with
a female RCA connector.
At this connector is already possible to
connect a monitor that has a video input.
This could be useful for making a test before
the installation and normally the video signal
is not carried out on long distances using this
type of connection.
Rather than providing a shielded cable
between the doorphone and the operator
monitor is more practical to use the "balun"
interfaces (balancer-unbalancer) and bring
the signal using a twisted telephone pair.
Typically, it is possible to use one of the pairs
of an UTP cat.5 cable.
Supplied with the system is present an
accessory that plugs into the RCA video
connector on the system AA-539C and
transforms it in an output screw terminals for
connecting the telephone pair described
above. This accessory is suitably protected
against accidental contacts being electrically
insulated from its metal parts with the use of
a special protective thermoformed shield.
Immediately near the operator monitor must
be connected on the same pair another
"balun" who will present the video signal to
the monitor on a male BNC connector which
can then be linked to the other adapters
(BNC to RCA etc.) according to the type of
monitor to be connected.
Video
Video out connector of the built-in camera.
Female RCA connector.
Adapter
Supplied accessory kit for connecting the
video signal on twisted pair cable, normal
telephone twisted-pair.
Pair cable connections
Terminals for the connection of twisted pair to
transport the video signal.
Make the connection of the twisted pair and
insert the adapter into the connector of the
camera, put it all back in the plastic back so
that it does not create too much bulk to the
board, allowing the correct closure of the
front of the system.
AA-539C
Video out
UTP
Pair/Cable
max
300 meters
Local
Adaptor
.
.
Remote
adaptor