User guide
MD PBX KEY CW
Issue 1.00
Page 7
Installation
View of the MD PBX KEY 2K electronic board (option)
CONTACT 2
POWER SUPPLY IN
12 VAC/DC
OPTIONAL CONNECTOR
FOR EXTERNAL LED
Please note!
The MD PBX KEY 2K optional board enables the use of the second contact. This board has
to be powered with a 12 Vac/dc voltage even if the main MD PBX KEY board doesn't
need a power supply. This is required as the device needs a voltage to let the ON/OFF
mode of the contact working (status memory).
The provided connection cable to the main board has to be connected on the
indicated connector (connector J6). Please take care that the yellow cable is on the
left side (close to the telephone line connector) and the brown cable on the right
side. Other wise the mother board could be damaged.
Depending on the delivered version install the
MD PBX KEY CW
doorstation as required.
With flush mounting versions the front plate and the installed electronic board should
be take off during the installation operations of the box. For the MD Version also for the
wall mounting version the front plate and the installed electronic board should be
dismounted for the installing operations. With the AV and ES version you can separate
the complete unit with front panel, back box and electronic board from the wall mounting
case. In this case you don't need to dismount the electronic board. With the AV version
with flush mounting installation do not forget to apply the delivered fitting strip to the
front panel.
With the BG version for installation behind existing panels, install the electronic board in
his case or letter box.
Please take care that a too large distance between board and
microphone can reduce the voice quality of the unit.
The function buttons contacts are
to be connected powerless. With the installation of the loadspeaker and the microphone
please take care that enough acoustic separation between the two items is granted.
Especially the backward generated sound waves from the loadspeaker should not get
outside the case or reach the microphone. If the delivered installation holders for
microphone and loadspeaker are used, this should not be a problem.
If possible use different cables to connect the telephone line and the AC power supply
for the lamp, door opener and optional 2K expansion board. This will reduce the