Control Link Cables - DIS CDS 4000 User Manual & Installation Manual

CDS 4000
•
Use round cable for the extension cable
between the central unit and the first
microphone unit. (Use cable converter.)
•
Use round cable for longer lengths of extension
cables (>5 m). (Use 2 cable converters per
section of round cable. One of each type, when
converter boxes is used.)
•
The ribbon cable must not be folded to form a
tube or likewise, bringing the first pair (mic
signal) close to other pairs of the ribbon cable
on longer lengths. It is not possible to use the
ribbon cable in electrical tubes with an inner
diameter smaller than the width of the ribbon
cable. Use only DIS round cable in such cases.
•
It is recommended to use round cable between
tables, as the ribbon cable is rather vulnerable.
Do not place ribbon cable under carpets, as it
will become damaged, if stepped on.
•
It is recommended to use plastic cable trunks
with removable lid between microphone units
on long tables to facilitate installation. This is
particularly easy, when more cables are needed
for channel selectors and/or voting. It is also
possible to glue on the cables under the tables.
Use an adhesive that allows cables to be
removed again, e.g. contact adhesive.
•
The ribbon cable must not be laid in the same
trunks as computer/data cables or mains power
cables or other cables that might emit noise.
•
Connect the ribbon connectors to the
microphone units, but do not mount the unit
into the C-profile, before the total system has
been checked. It is advised to start installing the
first row (table) of microphone units including
feeding cable closest to the central unit, and
then test this part first. Then the next row can
be installed and tested together with the first,
and so on. This way any connection faults can
be found at once and easily, only having to
check a small number of connections.
•
If a fault is observed, when a new row is
connected, then disconnect the new row
Manual no. 4479, Printed in Denmark, 02/03
(including cable from previous row), and check
again whether the previous row(s) functions.
Then connect again only first microphone unit
in next row to the previous, and check again.
Then add one or a few more units, and check
again. You will easily pinpoint the fault with
this procedure.
•
Always switch off mains power on the central
unit(s) before removing or adding units to the
chain. Omission to do this might cause damage
to the connectors.
NOTE
Conversion between round cables and ribbon
cables can be obtained by using the standard DIS
Cable Converter Boxes type CC 4001/CC 4002 or
by using Conversion Cable. The conversion cable is
a 50 cm long ribbon cable with 26-pole female
Molex connector in the end towards the
microphone unit, and a D-sub 25-pole male
connector for ribbon cable towards the round cable
(see drawing 4.6-86). Female D25 solder
connectors is used on the round cable. Another
advantage using this conversion cable instead of the
converter boxes is that the cable can be placed
under the microphone unit inside the C-profile.

Control Link Cables

•
Use standard flexible cable 4x2x0,25 mm
screen.
•
The total cable length must not exceed a length
of 300 m.
•
The units must be connected one after another
(daisy chain); i.e. it is not allowed to make star
point connection. Always have a male
connector in one end and a female in the other
end.
•
Always switch off mains power on all central
units (CU4005/CU4010) before removing or
adding MC4000 or CU4005/CU4010. Omission
INSTALLATION GUIDE
2
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