Cu4005/Cu4010 Central Units; Voice Activated Microphones - DIS CDS 4000 User Manual & Installation Manual

CDS 4000
•
RS422 cables can be up to 1000 m.
•
For RS422 a flexible cable of 5x2x0,25 mm
(min. 5 pairs) with screen is recommended.

CU4005/CU4010 Central Units

•
The central units can be placed on a table or in
a 19-inch rack.
•
Do not stack more than two units on a table.
•
Do not remove rubber feet.
•
There should be adequate ventilation, when
placed in a rack. Have one height unit between
each central unit, and one height unit under the
bottom unit and over the top unit. Forced
ventilation might be necessary; and there must
be free airflow through the ventilating holes of
the central units.
•
A common power switch is recommended in
the front of the rack for a larger system.
•
Make sure to have enough power for the
system. 200VA for each CU4005 and 300VA
for each CU4010.
•
Remember to check and set mains voltage
selector correctly.
Manual no. 4479, Printed in Denmark, 02/03

Voice Activated Microphones

2
The DM/CM41xx units draw more current, and
they also function a little different. Because of the
higher current consumption fewer units can be used
in one chain and somewhat shorter cable lengths
can be used.
When the units are used in the VOICE ACTIVE
MODE all output relays are switched on. This
means, that all the microphone output buffers with
their mixing resistors are connected in parallel on
the cable. Together with the series resistance in the
cable, this forms a ladder network, that will
attenuate the audio the more, the further out the
unit is placed in the daisy chain. Thus the following
rules must be observed:
•
A maximum of 20 units DM/CM41xx with 2 m
of ribbon or round cable each can be placed on
a chain to assure less than 3 dB level
difference.
•
NOTE: The above is only applying, when units
are used in the VOICE ACTIVE MODE
(yellow LED's on microphone units are lit).
•
A maximum of 2 m ribbon or round cable per
unit.
INSTALLATION GUIDE
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