76 XLS140 Installation Manual Form Number 95-7673-3 P/N 51927:C 12/06/2005
Power Supply Calculations Calculating the Battery Requirements
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.
Select batteries that meet or exceed the Total Amp-Hours calculated in Table A.4 and that are
within the acceptable battery charger range (12-55 AH). Write the amp-hours requirements on the
Protected Premises label.
Battery Size
Voltage
Rating
Number
Required
Part
Number
Backbox Size
12 AH 12 volts two
BAT-12120 SBB-A4*, SBB-B4*,
SBB-C4*, SBB-D4*
25 AH 12 volts two
BAT-12250 SBB-A4*, SBB-B4*,
SBB-C4*, SBB-D4*
55 AH 12 volts two
BAT-12550 XLS-LBB*
* Red version available; add “R” to part number listed here
Table A.5 Selecting the Battery Size
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