Honeywell H-S81-HS Operation Manual page 173

Calculation of Battery Capacity
Use the following table to calculate the capacity of the batteries to be used.
• Calculate battery capacity in standby A9[Ah]=(A8) x 24 [Hours].
• Calculate battery capacity in alarm condition B9[Ah]=(B8) x 0.083 [Hours].
• Calculate battery maximum capacity [Ah]=A9+B9
• Multiply the total capacity by a safety factor of 1.2. The result of the multiplication will be the
minimum required battery capacity.
• Select a battery type with capacity equal or higher that the calculated one, referring to the table
at the bottom of the page
The table below shows the lead battery type to be used according to the calculated capacity
H-S81-HS Installation & Operation Manual — P/N LS10114-000HI-E:A 2/24/2015
Total System Standby Current=
x Standby Time
Standby Battery Capacity=
Total Alarm Current=
x Alarm Time
Alarm Battery Capacity=
Total Calculated Battery Capacity=
x Derating Factor=
Battery Size Needed=
Part Number Description
6FM40-X 12 V - 40 Ah batteries
6FM65-X 12 V - 65 Ah batteries
6FM120-X 12 V - 120 Ah batteries
Power Supply Set Dimensions
(A8) A
24 Hours
(A9) Ah
(B8) A
0.083 Hours
(B9) Ah
A9+B9 Ah
1.2
C Ah
173