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Idiomas disponibles
English
Application
Door loudspeaker Multi with inte-
grated loudspeaker and microphone.
Can only be used in conjunction
with the HT 840-... in-house tel-
ephones.
Performance features:
• Loudspeaker, voice volume can be
adjusted
• Durable electret microphone
• Built-in step switch for line tuning
• Connection to control device takes
place via 4 cores, max. 200 m long
Electrical voltage
Mounting, installation and servicing
work on electrical devices may only
be performed by a suitably qualified
electrician.
Servicing
The functional unit can be com-
pletely exchanged if required.
Information regarding replacement
and checking the functional units
can be found in the product infor-
mation for the door station.
1 Connection pcb
For surface mounted door stations:
Connection not via connection pcbs
but in a similar manner as Siedle
Vario using terminal blocks.
Terminal assignment
c, b
Call button lighting, per
call button 3 mA
6
Call voltage for the call
buttons
7.1–7.8 Call buttons
a,b
Voice line
+, –
Supply voltage
Installation
2 Wiring diagram for lift emergency
call with STG 640-... control device
3 Wiring diagram with door loud-
speaker controller TLC 640-...
The complete connection for the
STG 640-... or TLC 640-... control
devices can be found in the relevant
product information.
Commissioning
Line balancing
The STLM 645-... must be tuned to
the connected conductor network
during commissioning. This tuning
must be repeated if necessary if the
conductor network is changed or
extended.
Basic tuning for an average line
length has been carried out at the
factory.
If the achievable volume is too
low or the system tends to couple
(whistle), then re-tuning must be
carried out. This can be done with
the aid of the potentiometer for
volume adjustment and the "L" step
switch.
The potentiometer for volume
adjustment and the rotary switch are
only accessible with the operating
plate removed.
Information regarding mounting and
removal can be found in the product
information for the door station.
Carrying out the line tuning
4 Establish a voice connection with
the user.
5 At the opening with the symbol
loudspeaker "b", turn up the volume
to the coupling limit using the plastic
key "a".
The plastic key "a" is inserted in the
inspection shaft cover.
6 Use the step switch "L" to tune
until optimum feedback damping
is achieved. If necessary, check this
by moving your palm in front of the
grille.
7 Check the stability of the system
by moving your palm up to about
5 cm in front of the grille, without
any feedback.
8 Carry out a voice connection test
to the closest and furthest user.
Specifications
Contact type: contact 24 V, 2 A
Switching time: 3 to 99 sec
Ambient temperature:
–20 °C to +55 °C
5
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