Tadiran Telecom Coral IPx 800 Series, Installation Procedure And Hardware Reference Manual

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Power Supplies
7-17
PS
19 D
C
-D
Po
wer Supp
ly Un
it wi
th D
upl
icati
on
7
7.2
PS19 DC-D
Power Supply Unit with Duplication
The DC duplication power supply (PS19 DC-D) provides internal operating voltages
for the Coral IPx 800, 3000 and 4000 systems.
The PS19 DC-D operates from a nominal input of –48VDC, typically supplied by an
external 48VDC rectifier or stationary battery plant. Actual input may vary from
–40 to –60 volts, allowing operation;
„
From external battery power source while the batteries are charged at an
equalized charge rate
„
During a power failure, until the batteries are completely discharged
Each PS19 DC-D is designed with the capacity to support two fully populated cages
with average mix of port types. The PS19 DC-D employs automatic switching
circuitry to share the output between two cages for redundancy purposes. The
PS19 DC-D may be used in any one of the following three configurations supporting
the cards in the cages:
See
page 7-28, Connecting the Power Supply Duplication Cable between Two Cages
for H719
DC-D wiring details.
1 General Description
Configuration Description
Economical One power supply supporting two adjacent cages via the
H719 DC-D connection cable, see
Figure 7-7
.
Redundant Two power supplies supporting two adjacent cages,
providing redundancy for both cages via the H719 DC-D
connection cable between the two cages. See
Figure 7-8
.
Double Power One power supply for each cage, powering only its own
cage (no cable). Installing one PS19 DC-D in each cage
enables greater power support among the cards of the
same cage. See
Figure 7-9
.