Nortel Networks DCT1900 - Manual (Page 263)

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