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5.
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(MT13 - En 2015)
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The connection of the video amplifier art.2223C in the DUO video-
intercom installation allows to increase the permitted maximum
distance of a single section of the installation, while the maximum
number of videointercoms remains unchanged (max. 50).
Recommended position of video amplifier.
The following block diagrams show the recommended position of
the video amplifier.
The recommended position is shown by a number shown in a
diamond that corresponds to the chapter that contains the
application diagram to be used.
Each amplified section of the installation allows to connect
additional 150 metres of Farfisa 2302 cable.
Block diagram of multi-
way installation with 1
entrance
VIDEO SIGNAL AMPLIFICATION
Block diagram of multi-
way installation with 2
entrances
Block diagram of multi-way installation with 1 main common entrance
and 2 secondary entrances (staircase division)
Block diagram of multi-way installation with 1 entrance and 2 risers
INSTALLATION NOTES
1
DV...
DV...
C
2
F
AL
DL
PE
B
VC
VC
AL
C
B
F
1
2
3
3
VC
VC
DV...
DV...
DL
DM
PE
PE
C
B
F
C
F
1
1
1
2
3
2
AL
DS
AL
VC
VC
VC
VC
DV...
DV...
DV...
DV...
DL
DL
PE
F
F
B
B
B
C
C
DV..
DV..
1
1
3
3
3
4
4
2
2
AL+
SM
AL+
SM
VC
VC
VC
VC
DV...
DV...
DL
DM
DM
PE
PE
PE
AL
List
AL = Power supply 2221S
or 2221ML
DL = Distributor DV2420
DM = Distributor DM2421
DS = Exchanger 2273
DV = Video distributor
PE = Door station
SM = Riser buffer 2231
VC = Videointercom