Specifications

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4000 Series | Modular Systems | Speaker Unit Modules
ART. FOR “4+1” AUDIO DOOR ENTRY SYSTEMS
AND VIDEO DOOR ENTRY SYSTEMS
4838 0 Call push button
4838-1 1 Call push button
4838-2 2 Call push buttons
ART. FOR “4+1” AUDIO DOOR ENTRY SYSTEMS
AND VIDEO DOOR ENTRY SYSTEMS
4838-1D 2 Call push buttons
4838-2D 4 Call push buttons
The 4838 Speaker Unit is the building block for the
following types of system.
■ Audio door entry systems with multiple entrances without
the need of the audio two entrance exchange (Art.502).
■ Video door entry systems without the need of the control
unit (Art.890) and on multiple entrances, without the need
of the video two entrance exchange (Art.892).
■ With an additional wire, allows for the inclusion of a local
door bell (only on systems without privacy of speech)
having a different call tone from the external call.
The Art.4838 (in each version) has a dip-switch that
allows for the adjustment of the following settings:
■ To set one of 4 different call tones.
■ To set the number of rings.
■ To set the conversation time.
■ To set the door opening time.
In addition to conventional acoustic signals, the 4838
speaker unit gives visual indication relevant to the system
operation by the 4 LEDs on the front panel.
■ The first LED (red) marked by the symbol , if switched
ON, indicates that it is not possible to make a call because
a call or a conversation is in progress (from the outdoor
station from which you are calling or from another outdoor
station on system with multiple entrances).
■ The second LED (red) marked by the symbol ,
if switched ON, indicates that a call is in progress.
The LED will be switched OFF when the call is answered.
■ The third LED (yellow) marked by the symbol ,
if switched ON, indicates that it is possible to speak.
The LED will be switched OFF at the end of conversation
(or at the end of the conversation time).
■ The fourth LED (green) marked by the symbol ,
if switched ON, means that the door lock has been
operated. It will be switched OFF at the end of the
“door opening” time.
As a result of the above features, the 4838 speaker units
provide a cost effective solution with more features and,
at the same time simplifying the installation.
The 4838 Speaker Units are a new introduction
to the 4000 Series and incorporate
Micro-processor technology