Document # 50079 Rev. D 05/23/97
Page
24
Secondary Power Source Calculations
Use the Total Standby and Alarm Load Currents calculated in Tables 5-1 and 5-2 for
the following battery calculation.
Standby Load
Current (Amps)
[ ]
X
Required Standby Time in Hours
(24 or 60 Hours)
[ ]
=
_________
Alarm Load
Current (Amps)
[ ]
X
Required Alarm Time in Hours (i.e.
5 min. = 0.084 hours)
[ ]
=
_________
Add Standby and Alarm Load for Required Ampere Hours
=
_________
Multiply by the Derating Factor of 1.2
=
_________
Total Ampere Hours (AH) Required
=
_________
Notes:
1) Battery size is limited to 7.0 AH using the internal FCPS battery charger.
2) For battery sizes greater than 7.0 AH, cut FCPS jumper JP1 to disable the internal battery
charger and use an external battery charger.
Table 5-3: Secondary Power Source Calculations
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