Farfisa ST 4231, Technical Manual, Page: 74 / 259

72
(MT11 - Gb2006)
Si 261L/1S
I
NTERCOMS
*
V
IDEOINTERCOMS
*
T
ELECOMMUNICA
TION
ONE-WAY INTERCOMMUNICATING SYSTEM WITH SECONDARY DOOR STATIONS AND 1 MAIN COMMON STATION (multiple
entrance)
Q.ty Article Description
... ST 720W Studio series modular intercom
... ST 701 Single button unit
... ST 704 Additional loudspeaker
1 PRS220 Power supply
X PRS226E Power supply-switcher
X 1473 Exchanger
1+X PA ** Door release push-button (optional)
1+X SE ** Electric door lock (12VAC-1A)
Door station series Mody (for right item set see on pages 16÷19)
Secondary entrances
X
MD71 Module frames with back box
X MD11 Module for electric door speaker
X MD81 Hood cover
X MD91* Rain shelter with module frames
X MD30 Electric door speaker (amplifier)
Main entrance
1 row 2 row
... MD71÷74 MD71÷74 Module frames with back box
1 MD10-11-12 MD10-122-124 Modules for electric door speaker
... MD21 ÷ 24 MD222 ÷ 228 Button modules
... MD20 - 50 MD20 - 50 Blank and info modules
1 MD82 ÷ 812 MD82 ÷ 812 Hood cover
1 MD92 ÷ 912* MD92 ÷ 912* Rain shelters with module frames
1 MD30 MD30 Electric door speaker (amplifier)
Door station series Matrix (for right item set see on pages 24 and 25)
Secondary entrances
X
MA71 Module frames with back box
X MA11P Module with integrated audio amplifier
X MA61 Front frame
X MA91* Rain shelter with module frames
Main entrance
...
MA71÷73 Module frames with back box
1 MA10P-11P-12P Modules with integrated audio amplifier
... MA20-22-24 Blank and button modules
... MA61÷63 Front frames
... MA91÷93* Rain shelters with module frames
Door station series Profilo (for right item set see on pages 28 and 29)
Secondary entrances
X PL71 Module frames with back box
X PL11P Module with audio amplifier
Main entrance
...
PL71÷73 Module frames with back box
1 PL10P-11P-12P Modules with integrated audio amplifier
... PL20÷24 Blank and button modules
5 1 9 2 3 0
P1
P2
C
P
C
P
JP2
9A 3A
ST704
- Do not forget to connect ter-
minals C of the additional
buttons and install the ST704
speaker module in every in-
tercom.
ST720
S
T
U
D
I
O
... Refers to number of users (see table).
X Refers to the number of stairways.
* Rain shelters are used instead of back boxes
and hood covers.
** Articles not supplied by ACI Farfisa.
Working instructions
As the basic system described on page 36,
with the following variations:
- The audio functions and door lock opening
are automatically switched to the door station
which has made the call and remain in this
state until a call from another entrance is
received.
- Services to secondary door stations are in-
dependent and can be operated at the same
time.
Notes
- For the connection of name-plate lamps, read
notes 6, 7 and 8 of the installation instructions
on page 35.
- For wires dimensioning refer to installation
instructions and table on page 35.
- The diagram shows 2 and 3 intercommuni-
cating intercoms. In case of a higher number
of intercoms see pages 59 and 78.
- If only 2 intercommunicating intercoms are
requested, even Compact series can be
used (see page 76).
Table for choosing intercoms and accessories for the required type of installation
Number of inter- Studio Application dia-
communicating ST 720W ST 701 ST 704 RL37 PRS210 gram on page:
2 2 2 2 0 0 73
3 3 6 3 0 0 73
4 4 12 4 1 1 78
5 5 20 5 1 1 59