Connecting Backup Batteries - Panasonic KX-TES824 Installation Manual

2.2.6

Connecting Backup Batteries

Backup batteries and a backup battery cable (KX-A227) provide a backup power supply to allow full
use of the PBX in the event of a power failure. In a power failure, the backup batteries automatically
maintain the power for the PBX without interruption.
1.
Set the Power Switch of the PBX to the "OFF" position and disconnect the AC cord from the AC
outlet.
2.
Connect the backup battery cable with 2 identical VRLA (Valve Regulated Lead Acid) batteries
(12 V DC × 2).
Red
Backup Batteries (12 V DC x 2)
• Turn on the power switch of the PBX only after the installation of the PBX is finished and AC cord
is plugged into the AC outlet.
• For each backup battery, battery capacity of 14 Ah or below is recommended (otherwise, the
battery charge may not be maintained).
• Make sure that the type and capacity of the 2 backup batteries are identical.
• The backup battery cable should not be exposed to direct sunlight. Keep the backup battery
cable and the backup batteries away from heating appliances and fire. Place the backup batteries
in ventilated place.
• For details about the backup batteries, refer to the manual intended for the batteries.
CAUTION
• Be sure to comply with all applicable laws, regulations, and guidelines.
• Make sure that the polarities of the backup batteries and wiring are correct.
• Make sure that you do not short the backup batteries or cables.
• When replacing one of the batteries, use only the same or equivalent battery type
recommended by the battery manufacturer. There is a danger of explosion if the backup
batteries are incorrectly replaced.
Dispose of used batteries according to the manufacturer's instructions.
• The charging time of your battery varies depending on the charge remaining, the
characteristics of the battery charger, and the ambient temperature.
Refer to the instructions provided by the battery manufacturer for details.
The following is an example calculation of the time needed to charge a drained battery
(Battery rating: 24 Ah) connected to the PBX:
Fuse
Backup Battery Cable
Black
2.2 Installing the Advanced Hybrid System
Connector
Battery Interface
Installation Manual 31