Alcad 960 Series Technical Manual

TELEPHONE AT
THE DWELLING
PUSH BUTTON
ELECTRIC LOCK
POWER SUPPLY
230 V230 V V
ENTRANCE PANEL
4
The door entry system is a security measure in
widespread use in dwellings today where it cons-
titutes a straightforward means controlling physi-
cal access to the property from the outside.
A large number of installation configurations are
possible; from basic ones with a single entrance,
to more complex installations, such as buildings
with multiple entrances or residential complexes
with a general entrance and one or more buil-
dings.
The system consists normally of an entrance
panel –normally fitted at the entrance to the buil-
ding– connected to a telephone in each area or
dwelling.
The entrance panel incorporates a series of
push buttons. Each push button corresponds to
an individual dwelling, so the number of push
buttons on the entrance panel depends on the
number of dwellings. When a push button on the
entrance panel is pressed it calls the appropiate
telephone. When the telephone handset is picke-
dup, communication is established with the call-
panel. The user can then open the door remotely
if desired by pressing the lock release button on
the telephone.
Like any other electronic system, the door entry
system requires an external source of power in
order to work. This function is performed by the
power supply unit which converts mains electri-
city into the voltages required by the system. The
power supply is usually sited in the hallway or a
common area of the building and normally near
the entrance panel for optimum operation.
It is possible to install individual entrance
panels in the case of buildings with multiple
entrances or in residential complexes with a
general entrance and one or more buildings.
A common system in use for door entry system
is referred to as the 4+ N, which is characterized
by the fact that the telephone in each dwelling is
connected by five wires. Four of these wires are
common to all the telephones in the building,
whereas the fifth wire is used to call each indivi-
dual dwelling. A system configured in this way
will require 4+N wires, where N is the number
of dwellings in the building or complex.
DESCRIPTION
DOOR ENTRY SYSTEM
1

Alcad 960 Series Specifications

General

Brand	Alcad
Model	960 Series
Category	Intercom System
Language	English