8-4 61204659L1-1A
Section 8, Power Loss Recovery MX2800 STS-1 User Manual
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 Figure 8-4.
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.
Figure 8-4. Battery Backup System
NOTE
The MX2800 STS-1 can operate on a fully-charged battery for four hours
without recharging.
White
Green
Black
Red
-
RET
PWR
FAIL
-
RET
PWR
FAIL
MX2800 STS-1
Battery Charger
Power Cable
Magnified View
-48 VDC
Backup Battery Pack
P/N 1175044L1
AC Power Input
AC/DC Power Supply
Battery Charging Unit
P/N 1175043Lx
DC POWER
115 AC 50/60Hz
0.8A
PWR
FAIL
RET
TRST R
CLK
A
CLK
B
S
–
L
A
N
NONCRITICAL
DSX-1/E1
(OUT)
DSX-1/E1
(IN)
NO COM NC
CRITICAL
M
O
D
E
M
OUT IN
A
B
A
-48V 0.7A
B
DSX-3
PWR
FAIL
RET
–
USE COPPER
CONDUCTORS ONLY!
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