Specifications

FIREFINDER SERIES II INSTALLATION, COMMISSIONING &
OPERATION
Idd=
440
I Alarm ( Ia = Iq + Ida – Idd ) = 769 + 720 – 440 = 1049mA
Battery capacity at end of
battery life
=
( Iq x 24 ) + Fc( Ia x 0.5 )
=
( 769ma x 24 ) + 2( 1049ma x 0.5 )
=
18456ma + 1050ma
Note:  1,000ma = 1 Amp
=
19.506Ah
New battery capacity
requirement
=
19.5 x 1.25
=
24.375 Ah
Rounded up to nearest
available
25 Ah
PRIMARY POWER SOURCE CALCULATIONS
Battery Charger Current
Requirement: Battery is charged for 24 hrs. to provide 5Iq + 0.5Ia
=
( 5x Iq ) + Fc( 0.5 x Ia )
=
( 5 x 769 ) + 2( 0.5 x 1049 )
=
3845 + 1050
Ah Requirement
=
4.895Ah
Battery Charging Current
Required
=
4.895
24 x e
e is the battery efficiency, 0.8
=
0.26A ( rounded )
Power Supply Requirement
Select the greater of 1 or 2
1. Ia + non- battery backed ancillary alarm loads
2. Iq + non – battery backed quiescent loads
If the power supply is used as the charger the current rating of the supply shall be
[(1 or 2) + battery charger current].
List of Compatible Batteries
(Tested by SSL to comply with AS 1603. 4 1987 Appendix G [valid until June 2002]).
Note 1: afp number is the SSL Listing Number.
Note 2: Types are the Manufacturers and not the suppliers.
Note 3: Automotive type batteries are not normally suitable for stationary use.