4466 EXTERNAL POWER SUPPLY
- FIRE ALARM SOLUTIONS TECHNICAL DESCRIPTION
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5. CURRENT CONSUMPTION CALCULATION
Calculate the total continuous current consumption, from both outputs/boards, excluding the battery charging current, in normal
state (I
TN
).
Calculate the total continuous current consumption, from both outputs/boards, excluding the battery charging, in alarm state (I
TA
).
When the backup battery is the power source, the current consumption for the charger board itself is 10.6
± 2 mA.
I
TN
shall be < 1.5 A or < 3.0 A respectively depending on if High or Low current charging mode is selected.
I
TA
shall be < 4 A (The battery charging will be turned off in conjunction with a fire alarm in the system.)
