NFS-320/E/C Installation Manual — P/N 52745:M2 7/1/14 57
Calculating the Battery Requirements Power Supply Calculations
A.3.2 Calculating the Battery Size
Use this table to choose the battery size, in amp-hours, needed to support the fire alarm system.
The CPS-24/E can charge batteries from 18 to 200 AH. Select batteries that meet or exceed the
Total Amp-Hours calculated in Table A.4 and that are within the acceptable battery charger range.
Write the amp-hours requirements on the Protected Premises label.
The maximum battery size that can be mounted inside the NFS-320’s cabinet is 26AH.
Battery Size
Voltage
Rating
Number
Required
Part
Number*
Backbox Part Number
†
18 AH 12 volts two BAT-12180 NFS-320 enclosure, BB-25
26 AH 12 volts two BAT-12260 NFS-320 enclosure, BB-25
100 AH 12 volts four for 100 AH
two for 200 AH
BAT-121000 BB-100
BB-200
*Manufactured to our specifications.
†
Red version available; add “R” to part number listed here
Table A.5 Selecting Battery and Battery Backbox
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