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INSTALLATION WITH TWO POINTS OF ENTRY
6+N+COAXIAL SYSTEM
Standard wiring diagram for electronic video door entry
installations in building with two entry points, both with a
video system.
Operation
One of the two entrance panels must be defined as the
main panel. When the auto switch-on system is activated
from the monitor, communication (both visual and audio) is
established with the main panel.
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 (ter-
minal 7) which is sent by the call wire to the corresponding
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 visitor hears a sound,
produced by the loudspeaker of the audio unit, which con-
firms that the call to the house has been made. The video
unit switches on and captures the image of the visitor and
sends the video signal to the monitors (M, V1). Normally,
the monitors are connected to one of the two video units by
default. If the other video unit is used by the visitor the video
signal is sent through the default unit (terminals M, V2) and
from there the signal is sent to the monitors (terminals M,
V1). In addition, the audio unit generates a control 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 V1, M) to the
top output of the tap-off to which it is connected, allowing it
to receive the video signal of the video unit (terminals V1,
M) and to see the image of the visitor.
The monitor is also connected to the common wire (2)
and to the lock release wire (1). If the handset is picked
up the audio wires (3 and 4) of the monitor are con-
nected to the entrance panel, establishing conversation
with the visitor. When the lock release button of the
monitor is pressed, the audio unit detects the closing of
the lock release circuit (terminal 1 to ground). The audio
unit then sends an alternate voltage (terminals 11 and
12) to the electric lock, permitting the opening of the
door.
All the signals are closed through the common wire
(terminal 2) of the monitor and of the audio unit.
Time settings established by the audio unit:
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 entran-
ce 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 con-
trol 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.
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