Lucent Technologies -48V CPS4000/CPS4000 PLUS Cabinet Power System
2 - 4 Product Description
Issue 13 December 2000
Shelf Design, continued
Two-Shelf Plants
In two-shelf plants the system is made up of an initial shelf and a
supplemental shelf. This initial/supplemental architecture eliminates
redundant equipment in two-shelf plants while offering the full feature
set available in single-shelf plants.
Initial Shelf
The initial shelf houses the control unit (including the office alarm
interface), power modules, and a distribution module with or without an
optional low-voltage disconnect (LVD).
Supplemental Shelf
The supplemental shelf uses blank panels in place of the control unit and
distribution module.
Example
Figure 2-4 is an example of a two-shelf rectifier-converter plant. This
system is appropriate for applications where battery-backed -48V power
is required for one load and regulated 130-volt power is needed for a
second load; e.g., T1 circuits in a customer premises application. In this
example, ES660 or ES660C rectifiers operating from commercial ac
source voltages provide the -48V output and furnish the input for the
converters.
To accommodate dual output applications, as in this example, -48V CPS
shelves are equipped with two power buses. A primary bus serves the
rectifier outputs and a secondary bus serves either ringer or converter
outputs.
Figure 2-4: Two-shelf Rectifier/Converter Plant
Batteries
Intershelf
Power
Intershelf
Signals
Primary Bus
Output
CPS Supplemental Shelf
CPS Initial Shelf
Customer
Provided
Fuses
or Circuit Breakers
Protected
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