SEC3002 FIRE ALARM CONTROL PANEL
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through the corresponding menu options under the category of ‘LOG’.
System information
Software versions
The version for each program of the control panel can be identified under this window.
Meanwhile, there will be a label regarding the version stuck on or beside each processor for
convenience.
6. Battery Capacity Calculation
The standby time of the fire alarm control panel after the main power source has failed depends
on the quiescent load of the panel, the alarm load of the panel, and the capacity of the batteries.
To determine the capacity of batteries required in a system, the following formula is used:
Battery capacity (Ah) = 1.25 x ( T
1
x ( I
Fq
+ I
Lq
) + T
2
x ( I
Fmax
+ I
Lmax
+ I
Rout
) +[ ( T1+T2 ) x I
P
] )
In which,
The multiplier 1.25 is present to account for loss of capacity over the life of the battery.
I
Fq
= 0.3A, which is the quiescent current of the fire alarm control panel in the event of the loss
of the mains supply;
I
Lq
is the quiescent current of the loop load, which is determined by the number of loads. The
quiescent current of a smoke detector, a heat detector, or a manual call point is typically
0.0002A (or 200μA), while that of a module/sounder strobe is 0.0025A (or 2.5mA);
I
Fmax
= 0.32A, which is the alarm current of the fire alarm control panel;
I
Lmax
is the maximum loop current. The alarm current of a smoke detector, a heat detector, or a
manual call point is typically 0.001A (or 1mA), while that of a sounder strobe is 0.08A (or
80mA);
I
Rout
is the alarm output current of the panel’s three relays, which is determined by the number
of loads they connect;
I
P
= 0.02A, which refers to the optional printer’s current consumption;