Nortel Networks DCT1900 - Manual (Page 256)

Technical Product Manual - DCT1900
Installation Instructions, Modular Cabinet – Power Cabling
19-6 Install-DCT1900/R8/mw
© 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 greater than 300W, such as a PBX power supply.
Fig. 19–7A & Fig. 19-7B give a schematic diagram of this configuration. Fig. 19–8 gives the cable
diagram of this configuration.
Fig. 19-7A - Schematic Diagram of Powering Modular Cabinet and 7 CLUs/SLUs with an External
Power Supply
Fig. 19-7B 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
MCCB
PW-BP