ARIA SOHO IP Hardware Description and Installation Manual
Issue 1
KSU INSTALLATION
December, 2008
18
3.2.6 External Backup Battery Installation
In case of power failure, the external backup batteries automatically maintain uninterrupted power for the ARIA SOHO
IP System. The external batteries must provide 24V DC; this is generally accomplished by connecting two 12V
batteries in a series arrangement as shown:
FIGURE 3.2.6 EXTERNAL BACKUP BATTERY INSTALLATION
NOTE—The cable used to connect the battery is supplied with the KSU.
Battery operation is controlled by the PSU. The PSU will provide charging current to the batteries during normal AC
power operation at a maximum of about 200mA. PSU battery operation will be halted if the AC power is re-connected
or if the battery voltage is too low to maintain full-system operation.
The external batteries can maintain System operation as needed depending on several elements such as battery
charge status, condition and capacity of the batteries, and System configuration (number of Station ports).
CAUTION—
It is recommended to use an external backup battery fuse (5A @250V) between the battery and
the System.
Recommended battery capacity is 24V/20AH MF; the ARIA SOHO IP System should be able to
operate more than 3 hours with batteries that are in good condition.
Carefully check the battery polarity with cable colors (Red and Blue) when connecting the battery
to the System.
Make sure that you do not short out the external batteries and cables.
There is a danger of explosion if external batteries are incorrectly replaced. Replace only with the
same or equivalent type recommended by the manufacturer. Dispose of used batteries according
to the manufacturer’s instructions.
