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9
Notifier Inertia-888 User, Technical & Programming Manual
Copyright (c) 2005, Notifier Inertia
CURRENT CONSUMPTION
No. Of Zones
Quiescent Current
Qui 2 AZF’s in alarm
8
127 mA
290 mA
BATTERY CAPACITY CALCULATIONS
The required Battery Capacity and Power Supply may be calculated utilising the following
formula.
Battery Capacity = 1.25 * ((I
Q
* 24 ) + F
c
* ( I
A
* 0.5 ))
Power supply Capacity = I
A
Battery Charger Capacity = (((I
Q
* 5) + F
c
* ( I
A
* 0.5 )) / 24 ) * 1.25
Where:
I
Q
is the Quiescent current of the panel (including any normally energised ancillary loads)
I
A
is the Alarm current of the panel (including any energised ancillary loads)
F
c
is the capacity derating (a value of 2 is deemed to satisfy requirements of
AS1670.1-2004)
E.G. For an IFS888 Panel equipped with the following:
8 Zones
2 Bells
1 Warning system relay output
1 ACF output
I
Q
= 0.127
I
A
= 0.290 + 2 * 0.06 for the bells, + 0.04 for the Warning system, + 0.04 for the ACF
= 0.490
Therefore:
Battery Capacity
= 1.25 * ((0.127 * 24) + 2 * (0.49 * 0.5))
= 4.3 AH
Power Supply Capacity = 0.49 Amps
Battery Charger Capacity
= (((0.127 * 5) + 2 * ( 0.49 * 0.5 )) / 24 ) * 1.25
= 0.05 Amps