47(48)
Date Rev
DocumentnumberPrepared
Doc respons/Approved Checked Reference
1999-07-15
A
1531-BDV BS 101 05 Uen
INSTALLATION INSTRUCTION
Subject responsible
10 Door Interface Unit (DIU)
(BFY BS 10101/1)
Installation:
The DIU is an interface connected via one or two ex-
tension lines to the ELU-A of the exchange and via a
set of wires to the door phone. The DIU should be
mounted indoors on a dry wall. The door phone can be
of any commercially available type as long as it meets
the requirements listed in the 1555-ASB15002Uen
SYSTEM OVERVIEW under section 7 Technical Data
for DIU.
Connection:
The wires to the speaker and microphone should be
led via two twisted pairs in a separate cable. Caution
when connecting a polarity-dependant microphone.
Check polarity on connector x1. Make the connections
to the door bell button, door opener and key lights etc
in another cable. This is to minimise disturbances on
the microphone line. The wires to the door opener
carry more current and should have a diameter greater
than 0.6 mm. The length between door phone and DIU
should be less than 50 m. The length between door
phone and exchange should be less than 500m.
The connector X18 is used for speech connection be-
tween DIU and exchange. The connector X17 is used
to activate the door opener. If the door opener wiring
already exists the X17 connection can be omitted and
the connection X12 leads to an existing button.
Pressing the door phone button (connection X5) acti-
vates the DIU and the programmed extension rings
(see Facility Description 15534-ASB15002Uen). The
interface stays active for the preset time selected un-
der "C" and shuts off after this time has elapsed.
10.0.1 Adjustments of DIU
The microphone level is factory set, but under certain
conditions the line attenuation can exceed expectations
resulting only in one way speech connection or clipping
of the voice between extension and door phone. In this
case cautious change of microphone level setting has
to be performed. The potentiometers range is
• If the voice in the speaker of the door phone sounds
too dim or is clipped, turn the mic potentiometer
screw two turns counter clockwise. Speak into the
telephone microphone and verify that the speaker
sounds loud and clear enough other wise repeat the
procedure.
• No voice connection to the speaker of the
telephone.Turn the mic potentiometer screw two
turns clock wise. Speak into the door phone
microphone and verify that it is heard in the hand set
of the telephone otherwise repeat again.
Settings on the board
mains
door
bell button
x5
K1
x2 x1
Volume
Mic
Loudspeaker
spkr mic
door phone
1 sec
4 sec
6 sec
8 sec
x12
x17
x18
B
1 min
2 min
3 min
D
C
+
-
DIU (BFY BS 101 01)
door
opener
MICLS
BELL
DO
Ext. B
Ext. A
TIMEOUT
OPENER
TO
Extension
B (door
TO
Extension
A (voice)
opener)
Transformer
Microphone sensitivity
level setting
+
-
A
use cable diameter
≥
0.6mm
(lead directly to door opener
button if already wired)
8...48VAC
B
The loudspeaker volume level is factory set. To
adjust turn the Loudspeaker potentiometer.
D
Timeoutfortheinterfacetoshutoff.Thejumperse-
lects intervals between 1...2...3 minutes.
Set door opener activation time 1...4...6...8 sec.
C
Microphone connection with polarity dependent
6 VDC supply for microphones with amplifiers.
A
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