Karel DS200, Technical Reference And Installation Manual

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DS Series PBX Technical Reference And Installation Guide
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XIII.3. DS200L
XIII.3.A. SPS200 AC/DC POWER SUPPLY
Installation of the SPS200 power supplies in the DS200L system are the same as they are
in the DS200 systems Details regarding the installation of these power supplies have been
explained in previous chapters.
If SPS200 is used for feeding DS200L system, -48V voltage required for the operation of
DCC Block can be obtained from battery connectors of SPS200 power supply or an external
power supply.
XIII.3.B. SPS248 DC/DC POWER SUPPLY
Installation of the SPS248 power supplies in the DS200L system are the same as they are
in the DS200 systems Details regarding the installation of these power supplies have been
explained in previous chapters.
XIII.3.C. USING AN EXTERNAL RECTIFIER UNIT AND
INSTALLATION OF THE REDUNDANT SPS248 UNIT
In case of large capacity DS200L systems require high capacity battery groups, external
power supplies can be used instead of SPS200 power supplies.
Structure of the DS200 exchange allows it to be fed by External power supplies. A power
supply that is capable of supplying a steady output voltage of 56 VDC (at least 10 A) can be
employed for feeding the DS200 system externally. An external rectifier unit can be used for
that purpose. By this way, need for including an SPS200 in each rack is avoided and two
SPS248 modules can be installed upon wish, in order to provide redundancy. (BPL200-
SPSX is supposed to be employed in racks.)
The connection between the external rectifier unit and TW200 towers can easily be made
with a two wire power cable. The DS200 connection point is the 4-pin connector located on
the back of the BLP200-SPS backplane. –56 VDC (the red wire) is connected to the first pin
(the top pin) and ground (the black wire) to the second pin.
Battery connection is made through the external rectifier.
As mentioned above, as for the cases where the exchange is fed by an External power
supply, the SPS248 DC/DC power supply module may be installed as a backup, upon wish. .
For this purpose, first of all, the BPL200-SPS modules that are in the exchange racks are
supposed to be replaced by BPL200-SPSX modules. Following that change, the External
power supply is connected to the power connector that is in the main rack as explained
above and two SPS248 modules can be installed in each rack. By this way, if one of the
SPS248 modules in a rack goes out of order, then the second one avoids an interruption in
the rack’s functioning, thus it maintains uninterrupted operation of the exchange.