User Manual
Product information and planning
9500 MPR Rel. 3.1
3DB18809AAAA Issue 1122/980
2.8.1.1 Power distribution
The system receives the Battery input through 2 power connectors mounted on the Subrack structure and
connected directly to the Backplane.
Each board, in which a DC/DC converter is mounted, is provided with fuses and diodes on all the lines,
in order to be fully independent from the other ones.
The ODU300 Modem unit provides the power supply to the ODU300.
The MPT Access unit can provide the PFoE to MPT to supply the MPT by using the same cable used also
to carry the Ethernet traffic.
On the output section the Core-E (Main) board provides +3.3V in parallel with the Core-E (Spare) board
to supply the Fan Unit.
A 3.3V, coming from the two Core-E units, is provided to read the EEPROM present on each board also
when the DC/DC converter, present on its board, is out of order.
Figure 39. Power Distribution Architecture
Batt. A
-48 Vdc +15%/-20%
Core-E
(Spare)
32E1/ASAP/
STM-1
MPT
Access
ODU300
MODEM
FAN UNIT
BACK PLANE
Batt. B
-48 Vdc +15%/-20%
Core-E
(MAIN)
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