tion in buildings with a single entrance.
Operation
When one of the push buttons on the entrance
panel is pressed the electronic call signal generated
by the audio unit (7) is sent via the call line to the
corresponding telephone (5), where it is heard on
the loudspeaker of the handset. At the same time the
audio unit’s own loudspeaker generates a sound to
confirm to the visitor that the call has been made.
When the handset is picked up the electronics
associated to the telephone’s audio lines (3 and 4) is
internally connected to the entrance panel. This co-
nnection sets up the communication between the tele-
phone and the entrance panel.
When the door lock release button on the telepho-
ne is pressed, the audio unit detects the closing of the
lock release circuit (1). The audio unit then sends an
a/c voltage (11 and 12) to the electric lock, thus allo-
wing the entrance door to be opened.
The common wire (2) of the telephone and entran-
ce panel provides the return path for all the telepho-
ne signals.
Basic circuit diagram of door entry system installation
V230 V230 V
4+N
TEL-001
ALA-040
ABR-001
5
2
2
5
5
5
V
MAN-030
MPD-004
BASIC INSTALLATION WITH ELECTRONIC CALL
MICROPROCESSOR-BASED 4+N SYSTEM
44
MATERIAL REQUIRED
MPS-/MPD Push button panel
module (depending
on characteristics of
the installation)
9670004 MAN - 030 Entrance panel
with audio unit multi
entrance without
privacy of
conversation, 4+N
system
9600001 TEL - 001 Electronic telephones
9620001 ALA - 040 Power supply
9730000 ABR - 001 Electric lock (other
models available)
CMO Flush-mounted box
(depending on
characteristics of
the installations)
MICROPROCESSOR-BASED 4+N SYSTEM CIRCUIT DIAGRAMS
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