NFS2-640/E Installation Manual —
P/N 52741:P2 7/10/14
69
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 a CAB-4 series backbox is 26AH.
Battery Size
Voltage
Rating
Number
Required
Our Part
Number
Backbox Part Number
†
18 AH
12 volts
two
BAT-12180
SBB-A4*, SBB-B4*,
SBB-C4*, SBB-D4*, BB-25
26 AH
12 volts
two
BAT-12260
SBB-A4, SBB-B4,
SBB-C4, SBB-D4, 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
