Assessing Battery Life
System Component Power Consumption.
Battery back up life is dependant on the power consumption of the main control panel and the
consumption of the detectors connected to it. The following table indicates how to assess the likely
back up period for a system. Other factors can have an influence particularly how many
charge/discharge cycles the batteries have been subjected to and the age of the batteries. It is
recommended that batteries are replaced every two years as a matter of course.
System Component
Monitor Mode
Alarm Mode
Tocsin 700
0.21Amps
0.25Amps
Tocsin 920
0.38Amps
0.5Amps
Tocsin 102 Pellistor HC Detector
0.13Amps
NA
Tocsin 102 Toxic Gas Detector
0.02Amps
NA
Audible Alarm (Typical Example)**
NA
0.12A
Additional Relay Units (8/16 Per Card)*
NA
0.01A/Relay
Visual Alarm (Typical Example)**
NA
0.15A
Tocsin 102 IR HC Detector
0.05Amps
NA
* Additional Relay Outputs Available In Blocks Of 8 For The Tocsin 700 System And
Tocsin 920 System. Note when Making Power Assessments Only consider Active
Relay outputs.
** Examples Only Check Supplied Data Sheets for chosen Products.
Battery De-Rating Factors
It is normal practice to de-rate battery performance with increasing current draw. The
following table indicates the de-rating factors recommended to be applied in
calculating the time any given system will run on battery battery power.
Power Level Drawn De-Rating Factor
<10%
0.87
>10%<30%
0.75
>30%
0.58
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