Main Battery (-48V / -60V) Power Distribution; Figure 89. Main Battery Distribution Inside Framework And Shelves - Alcatel 1850 TSS-320 Technical Handbook

I2
I1
POW320 -A Battery
Input Board
BAT A1
Input
Filter
A2
A3
Sensors of
N presence
for battery A
G
T
POW320 -A Battery
R
Input Board
U
BAT B1
Input
Filter
B2
B3
Sensors of
presence
For battery B

Figure 89. Main battery distribution inside framework and shelves

3.9.1 Main battery (-48V / -60V) power distribution

The redundant connection voltages provided by TRU at the subrack interface I2 are connect to the shelf
PSF card.
The solution presented for PSF is specifically designed for the 1850 TSS-320 node and foresees:
– Input filter to reduce the spurious frequencies produced from the DC/DC converters inside the
equipment
– After, the filter battery wires (positive and negative) are split in point to multipoint configuration
towards the tributary boards;
– For every battery line connected towards the boards a fuse is inserted (fuse F1 in Figure 89. on page
144) to protect the others connection battery line when one connection goes to the fault status
– For every connection line towards the boards the presence of the battery is monitored to identify a
fault at board level
The two -48V/-60V backpanel power rails are combined using sharing diodes on each card; under normal
operating conditions each unit selects the highest voltage in order to keep balanced the load on the two
power supply inputs.
Being the architecture of the power subsystem distributed, each card is in charge of deriving the specific
voltage levels it needs from the -48V/-60V power rails using dedicated on board DC/DC converters.
Technical Handbook Common
Functional Description
Fuse
Protections
F1
F1
Power Supply
.
Measurements
.
.
F1
.
.
.
Fuse
Protections
F1
F1
Power Supply
.
Measurements
.
.
F1
.
.
.
Back-panel Power
Supply distribution
I3
F2
F2
OR-Ring
Fuse
with Diodes
Protections
Input Power control for access panel
F2
F2
.
OR-Ring
.
Fuse
with Diodes
.
Protections
.
Input Power control for every board slot
.
.
.
.
F2
F2
OR-Ring
Fuse
with Diodes
Protections
Input Power control for every board slot
Alcatel 1850 TSS-320 Rel. 1.1
8DG 07734 AAAA Edition 01
Sensor of
presence
And
Overcurrent
protection
Sensor of
presence
And
Overcurrent
protection
Sensor of
presence
And
Overcurrent
protection
143/270