Battery Calculation Worksheet - Altronix AL802ADA220J Installation Manual

Device
For each device use this formula:
AL802ADA220J
(Current draw from battery)
A
Auxiliary Devices
B
C Notification Appliances Current must not exceed 8A (8000mA)
D Total alarm current
E Total current ratings converted to amperes (line D x 0.001)
F Number of standby hours (24 for NFPA 72, Chapter 1, 1-5.2.5).
G Multiply lines E and F.
Alarm sounding period in hours.
H
(For example, 5 minutes = 0.0833 hours.)
I Multiply lines E and H.
J Add lines G and I.
Multiply line J by 1.30.
K (30% extra insurance to meet desired performance)
Total ampere - hours required
Units are capable of recharging 40AH battery max. If total ampere - hour required exceeds 40AH,
decrease AUX current to provide enough stand-by time for the application.
AL802ADA220J

Battery Calculation Worksheet

Number of
Devices
This column x This column =
Stand-by:
1
Alarm:
AL802 Current
Refer to device manual for current ratings.
Alarm/Stand-by
Alarm/Stand-by
Alarm/Stand-by
Auxiliary Devices Current (must not exceed 1A)
Refer to device manual for current ratings.
Alarm:
Alarm:
Alarm:
Alarm:
Total stand-by
Total alarm
Total stand-by and alarm
Current per Device
Equals
90mA
175mA
mA
mA
mA
mA 0mA
mA 0mA
mA 0mA
mA 0mA
0mA
AH
AH
AH
Stand-by Alarm
Current Current
Current per number of devices.
90mA
175mA
90mA 175mA
mA
mA
mA
mA
A
H
AH
AH
AH
mA
mA
mA
mA
mA
mA
mA
mA
mA
A
H
AH
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