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Nortel Networks DCT1900 User Manual

Page 263

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Technical Product Manual - DCT1900

Installation Instructions, Modular Cabinet – Power Cabling

Install-DCT1900/R8/mw

19-13

© 2000-2005

Base Station Power Supplied to a Maximum of 7 CLUs/SLUs via the PW–EXT Input on the
MCCB

This requires a power supply with a capacity of greater than 300W, such as a PBX power supply.

Figures 19–15A & 19-15B give a schematic diagram of this configuration. Figure 19–16 gives the
cable diagram of this configuration.

Fig. 19 -15A - Schematic Diagram of Powering Modular Cabinet and 7 CLUs/SLUs with an

External Power Supply

Fig. 19-15B Schematic Diagram of Powering the Modular Cabinet and 7 CLUs/SLUs with two

separate -48V External Power Supply

Backplane

Modular Cabinet

Internal

CLU/

SLU

PW-
EXT

MCCB

A

B

ext

-48V

PW-BP

Backplane

Modular Cabinet

Internal

CLU/

SLU

PW-
EXT

A

ext

ext

B

-48V

-48V

PW-BP