77
INSTALLATION WITH TWO POINTS OF ENTRY, 1 VIDEO AND 1 AUDIO
6+N+COAXIAL SYSTEM
Standard wiring diagram for electronic video door
entry installations in building with two entry points, one
with a video system and the other with an audio system.
Operation
Define the entrance panel with the video video unit as
the main panel of the installation. In this way, when the
auto switch-on system is activated from the monitor, com-
munication (both visual and audio) is established with
this panel, as the one with the video video unit.
When one of the push-buttons on one of the entrance
panels is pressed, the audio unit activates the video unit
(connector 19) and generates an electronic call signal
(terminal 7) which is sent by the call wire to the corres-
ponding monitor (terminal 5). The loudspeaker of the
handset of the monitor emits a warning sound, informing
the house of the incoming call. At the same time, the visi-
tor hears a sound, produced by the loudspeaker of the
audio unit, which confirms that the call to the house has
been made. In addition, the audio unit generates a con-
trol signal (terminal 17) which deactivates the other
entrance panel.
The monitor is activated and connected to the power
supply terminals (terminals -,+) when it receives the call.
The monitor then sends the feed voltage (terminals M,
V1) to the top output of the tap-off to which it is connec-
ted. If the call has been made from the panel with audio
only, the then the monitor will not receive any signal and
its screen will remain blank.
If the call is made from the entrance panel with video,
then the video signal of the video unit (terminals M, V1)
will reach the monitor (terminals V1, M) and the visitor
can be seen on the screen.
Independently to the entrance panel from which the call
is made, the monitor is also connected to the common wire
(2) and to the lock release wire (1). If the handset is pic-
ked up, the audio wires (3 and 4) of the monitor are con-
nected to the entrance panel, allowing conversation with
the visitor. When the lock release button of the monitor is
depressed the audio unit detects the closing of the lock rele-
ase circuit (terminal 1 to ground). The audio unit then
sends an alternate voltage (terminals 11 and 12) to the
electric lock, allowing the opening of the door.
All the signals are closed through the common wire (ter-
minal 2) of the monitor and of the audio unit.
Time settings established by the audio unit of the panel
from which the call is made:
Time limit to answer the call 30 seconds
Time for conversation 60 seconds or until the handset is
replaced
When either of the two time settings expire the audio unit
eliminates the control signal (17), and both entrance
panels return to stand-by status.
Auto switch-on
When the auto switch-on button is depressed and always
providing that another monitor is not active, the monitor is
activated and enters into communication with the entrance
panel defined as the main panel. The audio unit of the
main panel does not generate the control voltage so it is
possible to make a call from either of the two panels.
Time settings for the audio unit 30 seconds or until the
handset is replaced
To Next Page
Loading...
