External Battery - Panasonic Digital Business System Installation Manual

Panasonic Digital Business System - Installation Manual
March 1997 Issue 5

External Battery

As an alternative to using the internal battery option in the event of a power failure and external battery system
can be installed to provide a longer period of operation when the power fails. If the external battery option is used
internal batteries cannot be connected.
The external battery consists of the following components; VB24971 Battery Cabinet and VB24973 Battery. The
battery itself consists of 2 parts of BT2004B rated 12v 24Ah.
The batteries will maintain system operation for approximately 3 hours on DBS 38 and 1 hour on DBS 68 and DBS
90 cabinets. When using external batteries each CCU in the system will require a cabinet and battery unit. The
power failure operation time will depend upon prevailing traffic conditions.
The maintenance maximum back up time Panasonic recommend replacing the batteries every 3 years. The
recommended replacement is VB24973 but any other battery meeting the specification can be used.
Important
This apparatus is designed for use when powered by VB24971, external battery unit in the event of a power
failure. Other usage will invalidate any approval given to this apparatus if as a result it ceases to comply with the
edition of BS6301 to which it was approved.
Figure 26 - Installing The External Battery
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