Pag. 7
Technical
POWER SUPPLIES
The door phone and video door phone systems need power supplies to be able
to work. These units take care of converting the building’s mains supply to the
energy requirements of the system, (which depends on the type of installation:
door phone, video door phone or with concierge unit).
Here follows a description of the characteristics of the different power supplies
which can be used in CityMax installations. All of them work from 220 volts.
For other voltages consult our table in page 64.
Audio Power Supply ref. 8787
This is neccessary in all installations from door phone to video door phone.
12Vac output to feed the amplifier.
Only one amplifier ref. 8787 is needed for the whole audio system in buildings
with one entrance. For systems with several entrances or in estates, the
corresponding installation diagrams must be consulted.
6 elements rail DIN format.
Video Power Supply Ref. 88302
Required in all video door phone systems. Supplies 18Vdc to feed the
telecamera and the monitors.
10 elements rail DIN format.
Emergency Audio Power Supply Ref. 8791
Neccessary so that the audio and lock opening systems work if there is a
power failure. 12 Vac output in normal conditions and 12 Vdc in a power
failure. It includes a quick recharging battery.
10 elements rail DIN format.
Distributor Power Supply Ref. 88231
Required in installations where there is an automatic switcher, concierge unit
with retention line or with an LED volume control indicator. 12 Vac and 12 Vdc
output.
6 elements rail DIN format.
AUTOMATIC SWITCHERS
Neccessary in installations where there are two or more outdoor panels
(entrances). Their job is to automatically select the panel from which the call
has been made.
10 elements rail DIN format.
There are two models:
Audio Switcher Ref. 8811
For door phone systems.
Video Switcher Ref. 8812
For video door phone systems.
VIDEO DISTRIBUTORS
All splits in the video signal are made using these distributors. This allows
the impedance to be maintained constant throughout the installation
whatever the number of monitors and thus avoiding defects in the image, such
as double image, loss of contrast etc.
There are two types of video distributor:
Video Distributor Ref. 2448
With two outputs.
Video Distributor Ref. 2449
With four outputs.
Video distributor
10 elements rail DIN format
COMPONENTS OF THE DOORPHONE AND
VIDEO DOOR PHONE SYSTEMS
6 elements rail DIN format
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