shall be internally mounted in the console, and activated upon receipt of
an alarm. The audible sounds used to indicate trouble messages shall be
separate and distinct from the sound used to denote receipt of alarm
messages.
2.4.6
For each console, primary power supply shall be 120 V, 60 Hz AC.
Emergency backup power shall be supplied by batteries capable of powering
the system for a minimum of 48 hours. The 120 V, 60 Hz AC power supply for
each console shall be obtained [through a single connection into the line
side of the building's regular AC service circuit] [from the building
emergency service circuit as shown] through a lockable fused disconnect
switch. Provide a separate disconnect switch for each console.
2.4.7
Emergency Power Source
**************************************************************************
Note: Batteries shall not be located in areas where
personnel are normally present.
**************************************************************************
Emergency backup power shall be supplied by lead acid type batteries having
plastic cases and explosionproof vents. Batteries shall be of sufficient
capacity to operate all functions of the console for no less than 48
continuous hours, in the event of loss of AC power. Batteries shall be
mounted on rack(s) designed for that purpose. A termination cabinet shall
be part of the rack. Battery rack(s) shall be located where shown.
2.4.7.1
Emergency Power Switchover
In the event of loss of normal AC power, transfer to the emergency power
mode shall be automatic and without interruption or loss of console memory.
When AC power is restored, transfer back to normal mode shall also be
automatic.
2.4.8
Console Battery Charger
Battery chargers shall be self-regulating. Each charger shall have the
capacity to completely recharge its associated batteries from full
discharge within 48 hours with the console fully operational on primary AC
power. The console shall remain operational on AC power with the batteries
removed.
2.4.9
Console Supervision
Supervisory controls shall provide constant supervision of the operating
condition of the console. Individual indicators shall be provided for each
major component, and an audible signal shall be produced in the event of
failure of any major component. This audible signal shall be distinctly
different from the signal used to annunciate alarms. A switch shall be
provided to silence the audible trouble signal.
2.4.10
Power Supervision
Each console shall continuously monitor its primary and emergency power
supplies. Any malfunction shall be indicated visually and audibly. In the
event of a primary power supply failure, the console shall automatically
and without interruption switch to battery backup and indicate the failure
SECTION 13854N
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