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Section 8, Power Loss Recovery
Battery Backup Mode
4.
BATTERY BACKUP MODE
With the installation of the ADTRAN Power Supply/Battery Charger (PS/BC) and backup battery pack,
the MX2800 STS-1 can continue operation without service interruption during a power outage. This
PS/BC (P/N 4175043Lx) provides –48 VDC to the MX2800 STS-1. It receives 115 VAC through a
standard plug and wall socket. See
The PS/BC maintains the battery at peak charge (–48 V) at all times. If AC power is lost, the unit automat-
ically transfers power to the battery without service interruption. When AC power is restored, the unit
reverts to AC power and recharges the battery. For installation instructions, refer to the documentation
provided with the PS/BC.
DSX-3
L
NONCRITICAL
A
N
A
OUT
IN
M
NO COM NC
O
D
E
B
M
CRITICAL
AC Power Input
-48 VDC
Backup Battery Pack
P/N 1175044L1
The MX2800 STS-1 can operate on a fully-charged battery for four hours
without recharging.
8-4
Figure
8-4.
MX2800 STS-1
DSX-1/E1
(OUT)
DSX-1/E1
(IN)
AC/DC Power Supply
Battery Charging Unit
P/N 1175043Lx
Battery Charger
Figure 8-4. Battery Backup System
NOTE
DC POWER
115 AC 50/60Hz
0.8A
PWR
–
PWR
–
RET
RET
FAIL
FAIL
B
A
-48V
0.7A
T R S T R
S
CLK
CLK
A
B
Power Cable
MX2800 STS-1 User Manual
Magnified View
61204659L1-1A
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