7
(MT11 - Gb2006)
I
NTERCOMS
*
V
IDEOINTERCOMS *
T
ELECOMMUNICA
TION
INTERNAL STATIONS
INTERCOMS Studio series
ST 703.
Ringing volume adjustment
switch.
9
C
OFF
MED.
MAX.
3 levels to adjust ringing volume
(off, medium and maximum)
call button
to terminal 9 of the inter-
com or 9A of ST 704 ad-
ditional loudspeaker.
ST 715.
Switch module. It allows to acti-
vate or deactivate one of the intercom functions
(for example call, door lock release, etc.). Maxi-
mum contact current is 0.1A.
NA
C
ON
OFF
9
call button
to terminal 9 of the inter-
com or 9A of ST704 ad-
ditional loudspeaker.
RL 36. Relay module. When installed inside
intercoms it allows to activate additional bells
(see page 26). Maximum switching current is
1A (24V).
Terminals
C
common terminal of relay
NA normally open contact of relay
NC normally closed contact of relay
-
ground
13Vac/dc voltage input
EC relay activation input (ground command)
Wires
9
electronic call input without resistive load
3
ground
Example of switch module application to deac-
tivate the intercom call
S
T
U
D
I
O
NA NC
C
9
3
EC
ST 704.
Additional loudspeaker. It allows
to receive calls with off-hook handset, or in
systems with 2 calls, with 1 single call and 1 call
in common to other intercoms.
To install the module the last module holder on
the intercom base must be removed (see draw-
ing). The article takes the space of 2 modules,
and therefore reduces the number of additional
buttons to 4.
3A
9A
ST 716. Switch module with LED. It allows
to activate/deactivate/divert one of the inter-
com functions (for example call, door lock re-
lease, etc.) with visual indication of the function.
Maximum contact current of switch module is
0.1A.
The article takes the space of 2 modules. It is
recommended to install it in the last position in
order to use the space in the bottom part of the
intercom.
L+
L-
NA
NC
C
6÷21Vac/dc
call button
to terminal 9 of the
intercom or 9A of
ST704 additional
loudspeaker.
Example of switch module with LED applica-
tion to deactivate the intercom call with visual
indication
