244
(MT11 - Gb2006)
1+1
I
NTERCOM
*
4+1 V
IDEOINTERCOM
Check that the connections of the system are carried out correctly.
Put the system in use by connecting the power supply to the mains.
By pushing a call button from the external push-button panel, it acti-
vates the bell of the corresponding video intercom and it activates the
system for a time of about 100 seconds. The images appear on the
video intercom a few seconds after the call.
If in the meantime another call occurs, the video intercom shuts itself
OFF and connects the last call. The system switches OFF automati-
cally after 100 sec.
In case more calls occur simultaneously, a protection circuit against
overloading and short circuiting is provided to disable the timer and
therefore to shut OFF the system.
In the absence of calls from the door station, from any video intercom
(if provided in the system) it is possible to control the entrance by
pressing the
button (control switch ON).
To work the electric door lock release press the
button from video
intercoms.
In the two or more entrance systems all the audio and video commu-
nications and door lock release, from one entrance to the other, are
automatically switched with the call or the control switch ON.
In these systems the control switch ON from the video intercoms can
interrupt a running communication, for this reason it is advisable to
interrupt, by means of a relay. This function when the video system is
active, giving the priority of the communication to the door stations for
some examples see pages 251 and 252.
Adjustments
All the regulations are carried out in the factory. For possible correc-
tions the intervention of a specialized technician is advisable. The
Contrast and Brightness adjustments, being subject to the environ-
mental lighting conditions, are accessible from the under-neath by
means of a screw driver.
WORKING INSTRUCTIONS
CONNECTION WITH FLOOR DISTRIBUTORS
The video wires of each video intercom are insulated from the riser.
Connections are made on the DV2D or DV4D floor video signal
distributor box.
Technical data
Power supply
15÷21Vdc
Operating current
60mA
Max. input video signal
2Vpp
Insertion loss
0.8dB
Bandwidth
>5MHz
Connection of the video signal with distribution on several risers
In video systems with different risers you must use 1 or more video
distributors art. DV2D or DV4D.
Terminals X and Y of the last distributor must be terminated with the 75
Ω
resistances supplied with the article. It is not necessary to terminate the
unused outputs.
Example of connection on 8 risers
DV2D-DV4D. FLOOR VIDEO SIGNAL DISTRIBUTORS.
They allow for the distribution of the video signal taken from the riser on
2 or 4 outputs. They can be installed on the wall on a wall box, with
expansion plugs or it can be placed in the junction box.
DV2D
DV4D
DV2D
DV4D
“ A ”
“ B ”
“ C ”
“ D ”
“ E ”
“ F ”
“ G ”
“ H ”
X
Y
H
F
X
Y
H
F
X
Y
H
F
X
Y
H
F
X
Y
H
F
X1
X1
X1
Y1
Y1
Y1
X2
X2
Y2
Y2
X3
X4
X3
Y3
Y4
Y3
X4 Y4
2x
75
MD41D
Connection of the video signal on a single riser
Terminals X and Y of the last distributor must be terminated with the 75
Ω
resistances supplied with the article. It is not necessary to terminate the
unused outputs.
INSTALLATION INSTRUCTIONS
X
Y
H
F
X
Y
H
F
X
Y
H
F
X
Y
H
F
X1
Y1
H
F
X1
Y1
H
F
X2
Y2
H
F
X2
Y2
H
F
DV2D
DV4D
DV2D
DV4D
X Y H F
X Y H F
X Y H F
X Y H F
2 x
75
W
PT5111
KM8111
KM8111
PT5111
25
4
"
16
/
13
122
1
2
"
16
/
11
68
"
X Y H F
3
3
X Y H F
4
4
F H Y X
F H Y X
F H Y X
2
2
F H Y X
1
1
3
"
4
/
1
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