Edwards Signaling 2400 Series User Manual
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Battery Calculation Example #1
A panel with one (1) option module is to be installed in accordance with the Canadian National Building
Code (NBC) requirement of 24 hours standby, 30 minutes alarm. The IAC requires 2.5 Amps, and there is
no auxiliary power used. Calculate the minimum required battery capacity that will meet the requirements.
Looking at Table 10.3, the intersection of the one (1) option module row and the 2.5 Amp IAC alarm
current column within the “0 mA” area of the table occurs at 6.5. This indicates that the required battery
capacity is 6.5 AH. Two 12 V, 6.5 AH batteries (P/N 12V6A5) will adequately power this system.
EXAMPLE #1
Table 10.3 - 24 Hours Supervisory, 30 Minutes of Alarm
Signal Circuit Current for 30 Minutes
Aux. Circuit Current: 0-0.5 Amps for 30 Minutes
Panel Current Load
Signal Circuit Alarm Current (A)
Aux. Sup
Current
#
Option
Modules
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0 mA
Amp/Hour Battery Size
“
0
4.5
4.5
4.5
4.5
4.5
6.5
6.5
6.5
“
1
4.5
4.5
4.5
4.5
6.5
6.5
6.5
6.5
“
2
4.5
4.5
4.5
6.5
6.5
6.5
6.5
6.5
“
3
4.5
4.5
6.5
6.5
6.5
6.5
8.0
8.0
“
4
4.5
4.5
6.5
6.5
6.5
8.0
8.0
8.0
“
5
6.5
6.5
6.5
6.5
8.0
8.0
8.0
8.0
“
6
6.5
6.5
6.5
6.5
8.0
8.0
8.0
-