Pag. 29
Technical
General diagram for basic door phone installations in enclosures or estates with one main entrance and
several interior blocks with one entrance each .
There is no limit on the number of blocks, however, the greater the number of blocks the more complicated
is the installation and so it is not advisable for installations with more than three interior blocks.
For more blocks we reccomend the use of digital systems (MDS).
BASIC FUNCTION
This system works as if it were made up of several independent basic door phone systems with two entrances (see
diagrams E 1.4), but with the peculiarity that the main entrance panel shares the same amplifier.
So we have to install an automatic switcher in each block in such a way that when a call is made from the main
entrance panel the automatic switcher selects this entrance. If the call is made from the entrance to the block then the
automatic switcher will select this block.
OBSERVATIONS
As the installations with two entrances with an automatic switcher have an "activated" position, in which the conversation
time is limited to 90 seconds (or until a call is produced from another panel) and another "at rest", in which the
conversation will only be cut off if there is a call from another panel, the cables from the main entrance panel will be
connected to the "at rest" terminals and those from the block will be connected to the "activated" terminals so that
priority in the duration of conversation will be given to the calls made from the main entrance panel.
The main entrance panels must contain as many pushbuttons as there are on the interior block panels.
MATERIAL NEEDED
In the dwellings
T1, T2, ...Tn Citymax Telephones Ref.: 8044
In each internal block
A7 Distributor Power Supply Ref.: 88231
A5 Audio Switcher Ref.: 8811
P Outdoor panels (neccessary combination)
F Electric lock Ref.: 2911 (for other types consult catalogue)
In the main entrance
A1 Audio Power Supply Ref.: 8787
PG1 Outdoor Panels (to call dwellings in block 1)
PG2 Outdoor Panels (to call dwellings in block 2)
...
PGn Outdoor Panels (to call dwellings in block n)
F1 Electric lock Ref.: 2911 (for other types consult catalogue)
E 1.6 DOOR PHONE SYSTEM
CONDOMINIUM WITH SEVERAL BLOCKS
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