Altronix AL1042UL2ADA Installation Manual page 9

Device
For each device use this formula: This column x This column = Equals
AL1042UL2ADA
(Current draw from battery)
A
Auxiliary Devices
B
Notification appliances
C Notification Appliances Current must not exceed 10 amp (10000mA)
D Total alarm current
E Total current ratings converted to amperes (line D x .001)
F Number of standby hours (24 or 60 for NFPA 72, Chapter 1, 1-5.2.5).
G Multiply lines E and F.
H Alarm sounding period in hours.
(For example, 5 minutes = .0833 hours.)
I Multiply lines E and H.
J Add lines G and I.
K Multiply line J by 1.30.
(30% extra insurance to meet desired performance) Total ampere - hours required
Units are capable of recharging 65 AH battery max. If total ampere - hour required exceeds 50 AH,
decrease AUX current to provide enough stand-by time for the application.
AL1042UL2ADA
Battery Calculation Worksheet
Number of Current per Device
Devices
1 Stand-by:
Alarm:
AL1042 Current
Refer to device manual for current ratings.
Alarm/Stand-by
Alarm/Stand-by
Alarm/Stand-by
Alarm/Stand-by
Auxiliary Devices Current (must not exceed 1 amp)
Refer to device manual for current ratings.
Alarm:
Alarm:
Alarm:
Alarm:
Total stand-by AH
Total alarm AH
Total stand-by and alarm AH
Stand-by
Current
Current per number of devices.
90mA 90mA
175mA
90mA
mA mA
mA mA
mA mA
mA mA
mA 0mA
mA 0mA
mA 0mA
mA 0mA
0mA
mA
A
H
AH
AH
AH
Alarm
Current
175mA
175mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
A
H
AH
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