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Backup Battery Connection - Panasonic KX-NS500 Installation Manual

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4.2.12 Backup Battery Connection

4.2.12 Backup Battery Connection
The backup batteries and Back-up Battery Cable provide a backup power supply to allow full use of the PBX
in the event of a power failure. In case of power failure, the backup batteries automatically maintain the power
to the PBX without interruption.
User-supplied Items
Backup Batteries: VRLA (Valve Regulated Lead Acid) 12 V DC ´ 3
Back-up Battery Cable: KX-A228
WARNING
There is a danger of explosion if backup batteries are incorrectly replaced. Replace only with
the same or equivalent type recommended by the battery manufacturer. Dispose of used
batteries according to the manufacturer's instructions.
Make sure that you do not short the backup batteries or cables.
CAUTION
Make sure that the Back-up Battery Cable is securely fastened to both the backup batteries and the
PBX.
Make sure that the polarities of the backup batteries and wiring are correct.
Use the correct type of Back-up Battery Cable for the PSU.
Notice
Be sure to comply with applicable local regulations (e.g., laws, guidelines).
Note
Turn on the battery switch on the PSU only after the installation of the PBX is finished and AC power
is available.
The recommended maximum capacity is 28 Ah, to maintain effective battery charge.
Make sure that the type and capacity of the 3 backup batteries are identical.
The Back-up Battery Cable should not be exposed to direct sunlight. Keep the Back-up Battery Cable
and the backup batteries away from heating appliances and fire. Place the backup batteries in a
ventilated place.
For details about the backup batteries, refer to the manual for the batteries.
Backup Power Supply Duration
The length of time that backup batteries can power the PBX varies depending on the total load figure. For how
to calculate the load figure from the connected items, refer to "Load Figure Calculation".
Examples
Battery Capacity
28 Ah
*1
The duration may vary depending on the conditions.
Connecting Backup Batteries
1.
Turn off the battery switch on the back side.
96
Installation Manual
Backup Power Supply Duration
16 h
*1

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