Panel Programming Power Supply Calculations
XPIQ PN 51013:C 7/01/03 73
Calculating the Required Battery Capacity
Use Table 4.4 to calculate the total Standby and Alarm load in Ampere hours (Ah). This total load
determines the battery size in Ah, required to support the XPIQ transponder under the loss of AC
power. Complete Table 4.4 as follows:
1. Enter the totals from Table 4.2 and Table 4.3 where shown
2. Enter the NFPA Standby and Alarm times (refer to ‘NFPA Battery Requirements’ below)
3. Calculate the Ampere hours for Standby and Alarm, then sum the Standby and Alarm
Ampere hours
4. Multiply the sum by the derating factor of 1.2 (1.5 for ULC installations) to get the proper
battery size in Ah
5. Write the Ampere hour requirements on the Protected Premises label located inside the
cabinet door
Secondary Standby Load
(total from Table 4.2 )
[ ]
Required Standby Time
(24 or 60 hours)
x [ ] = Ah
Secondary Alarm Load
(total from Table 4.3 )
[ ]
Required Alarm Time
(For 5 min., enter 0.084,
for 10 min., enter 0.168
for 15 min. enter 0.25)
x [ ] = Ah
Sum of Standby and Alarm Ampere hours = Ah
Multiply by the Derating Factor x 1.2 (1.5 for ULC installations)
Battery Size, Total Ampere hours Required = Ah
Table 4.4 Total Secondary Power Requirements at 24 VDC
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