13
(MT11 - Gb2012)
EX321
1
3
7
6
A1
C
9
INTERNAL STATIONS
1+1
INTERCOMS *
4+1
VIDEOINTERCOMS
E
X
H
I
T
O
W1
1
6
2
3
C
B
1
6
3
7
CT
R1
SM50. Private conversation module.
To have complete audio privacy between us-
ers it is necessary to add to each intercom the
private conversation module.
The intercom can communicate with the out-
side (for an unlimited period) only after having
received the call. The intercom becomes
disactived when there is a call from another
intercom or the door release push-button is
pressed.
Terminals
C audio line receiver
B audio line transmitter
- ground
Note
B and C terminals are unused in an 1+1 intercom
system.
EX304. 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 re-
duces the num-
ber of additional
buttons to 4.
RL 36. Relay module. When installed inside
intercoms it allows to activate additional bells.
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 in-
put without resis-
tive load
3 ground
NA
NC
C
9
3
EC
SR41. Electronic buzzer module. In the
intercoms can be added for having a further call
signal.
Terminals
4 power supply input
(13Vac-70mA; 9÷20Vdc-15mA)
3 ground
Notes
In each intercom EX311 or EX321 it is neces-
sary:
- to cut the jumper (W1) that links the termi-
nals 3 and 7;
- to make the connection between terminal 7 of
the intercom and the - (minus) of the private
conversation module.
In all SM50 private conversation modules cut
the resistance R1.
EX332. Module with 3 LED.
L1, L2, L3
terminals input + / - : max 13Vac / 24Vdc
13÷48Vac/dc
Additional bell connection
If the ringing volume is not sufficient or if you
need to chime the call in a different place, you
can add an additional bell enabled by a relay.
intercom
terminals
OFF MED. MAX.
3 levels to adjust ring-
ing volume (off, me-
dium and maximum)
ST703. Ringing volume adjustment
switch.
P
P = audio and call conduc-
tor
= ground conductor
Note
Do not use this connection
in intercoms where is
already installed the module
SM50.
EX311 + SM50
EX321 + SM50
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