Skanti DSC 9001, Technical Manual, Page: 88 / 178

DCU 9000 without Mounting Bracket
The DCU 9000 without mounting bracket may be bulkhead or console mounted as shown in fig.11
at page 3-22. Fig.12a and 12b at page 3-23 shows how flush mounting may be obtained and gives
the dimensions for the necessary hardware.
External connections to the DCU 9000 are made to the connectors at the back of the unit as
illustrated in fig.13 at page 3-24.
DU 9000
The DU 9000 DSC unit should be installed in a dry place near the associated radiotelephone and
consideration should be given to accessibility for service. Airspace should be provided around the
unit for adequate air circulation through the unit and the heat sink at the exterior of the unit. Fig 14
at page 3-25 shows the mounting possibilities and overall dimensions and shows the minimum
distances to other objects ensuring good cooling.
External connections to the DU 9000 are made to the connectors at the back of the unit as illustrated
in fig.15 at page 3-26.
Power Supply
The DSC 9000 operates at voltages between 10.8 and 41.6 VDC and may be powered from a 12V,
24V, or 32V battery or from an AC Power Supply Unit with a DC output voltage within the specified
range.
When used with a Skanti TRP 7000 or TRP 8000 transceiver the AC Power Supply Unit of the
transceiver is capable of supplying the additional power required by the DSC 9000.
The supply leads are connected to the supply terminal strip of the DU 9000. The supply terminal
strip is adapted for screened power supply cable. Note that fuses must be provided in the supply
leads to protect the cable. Table 2 at page 3-29 shows the necessary cable cross section and
external fuse rating.
Earth connection of the equipment will not cause the battery to be earthed. Maximum permissible
peak voltage between the battery terminals and the earth is 100V. The supply input is protected
against polarity reversal.
Earth Connections
The earth terminal of each unit, where separated, should be connected to earth using 2.5mmSq
wire, see fig.18 at page 3-30. The wire should be as short as possible and preferably be connected
to a separate earth screw, which should not be shared by any other equipment. The earth lead
should run as far away from the transmitter earth lead as possible.
INSTALLATION DESCRIPTION
3-4 DSC 9000 TECHNICAL MANUAL