27
(MT12 - Gb2004)
I
NTERCOMS
*
V
IDEOINTERCOMS
*
T
ELECOMMUNICA
TION
ADDITIONAL BELL
If the ringing volume is not sufficient or if you need to chime the call in a
different place, you can add an additional bell enabled by a relay.
Additional bell enabled by a relay to be installed inside the
intercom
12 ÷ 48Vac/dc
intercom
terminals
Additional bell enabled by a relay in a DIN
housing
12Vac/dc ÷ 230Vac
INSTALLATION INSTRUCTIONS
ADDITIONAL AUDIO AMPLIFIER
In intercommunicating systems with long distances between intercoms
and power supply, to increase the intercommunication audio level, it is
advisable to install an amplifier art. 2443 (see page 90 for characteris-
tics). The following diagram can be applied to all intercommunicating
systems (from page 47 to page 61).
WORKING INSTRUCTIONS
Basic systems
For all the intercom systems, simply lift the handset to speak to the door
station. The call is indicated by an audio signal (a buzzer or an electronic
bell).
To activate the door release, press the push-button with the key symbol.
In systems with two or more entrances the communication and door
release are switched automatically on the entrance from which the call
is made while the other entrances are isolated.
Systems with private conversation module
In all standard intercom systems (not intercommunicating) a private
audio system can be provided (only the intercom which has been called
can speak to the door station) by installing the “private conversation
module" art.SM50 in every intercom.
Since the buzzer rings, the user has about 30 seconds to lift handset and
answer. There is no time limit for the private conversation. When the
handset is replaced the system returns to the rest condition. If a user
does not replace the handset properly, the next call from another
intercom, automatically cuts him out of the audio connection with the
door station.
Intercommunicating systems
Intercommunicating systems allow users to speak to one another by
simply lifting the handset; any user can join in to a conversation already
in progress. To avoid interferences it is necessary to observe the
following instructions.
Lift the handset, make sure that there is not a conversation already in
progress, then press the call push-button corresponding to the desired
user.
Intercommunicating systems connected to door station
Such systems allow conversation between two or more inside users with
the exclusion of the door station, or between one inside user and the
door station.
When there is a call from an external push-button panel the audio line of
the electric door speaker is activated automatically; when one calls from
one of the intercoms, the internal intercommunicating audio line is
automatically activated.
The user called has simply to lift the handset.
Any user can join in to a conversation already in progress.
To avoid interferences it is necessary to observe the following instruc-
tions:
- lift the handset, make sure that there is not a conversation already in
progress, then press the call push-button corresponding to the desired
user.
As it is shown in the connection diagram, internal calls have a sound
(electronic) distinct from external calls (buzzer).
To activate the electric lock it is necessary to push the push-button with
a key symbol on. By performing this operation the system returns to the
intercommunicating service with the audio exclusion of the door station.
Terminal 9 is
used in the
Si11MO/3
diagram on
page 61 (only
PRS226E).
intercom
terminals
