Advanced Electronics Ex-3000 Series - Loading Calculations; Panel Loading; Battery Standby Calculation

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2.6 Loading Calculations
2.6.1 Panel Loading
The Total Panel Load must not exceed the rating of the power supply. The power supply can
deliver a 2A total load maximum.
The panel loading includes the panel itself (70/125mA), any power required for additional option
modules and all external power required for the Input, Output and AUX circuits.
The backlight is turned off during AC supply failure (after 60 seconds). It turns on in Alarm or if the
panel keys are pressed.
2.6.2 Battery Standby Calculation
Quiescent Load Fire Alarm Load
Equipment I (A) x Total I (A) x Total
EX-3000 Panel
0.070
5
1.0 = 0.070 0.125
6
1.0 = 0.125
Mxp-008 0.000 1.0 = 0.065
7
1.0 =
AUX #1 Supply Output
8
1.0 = 1.0 =
AUX #2 Supply Output
8
1.0 = 1.0 =
Sounder Output 1
9
1.0 =
Sounder Output 2
9
1.0 =
Sounder Output 3
9
1.0 =
Actuator Output 1.0 =
Total
ΣQuiescent Load
=
ΣAlarm Load
=
x 24 hr =
Ahr
x 72 hr =
Ahr
2
10
x 0.5 hr =
Ahr
 (carry forward) + Ahr
Total Load (Quiescent + Alarm) =
Ahr
x 1.25
10
(Battery De-rating factor) = Ahr
5
Figure quoted is for mains fail condition (backlight off) – add 15mA for first hour of fault when the backlight is on.
6
Figure quoted is for fire in mains fail condition – with Relay1, Relay 2 & Fire relay energised (backlight on).
7
Figure quoted is for all relays on. 8mA per relay output on.
8
Maximum 0.5A load per AUX. Calculate the required load for each auxiliary output in both the quiescent and alarm
conditions. Refer to the technical information for each device that is to be powered from the panel AUX Output to
determine the overall AUX loading currents. The sum of all these additional currents should be entered in these fields.
9
Maximum 1.0A load per Sounder.
10
The alarm load should be doubled to allow for changes in battery efficiency for loads in excess of the recommended
C/20 discharge rate. The total load calculated should be multiplied by a de-rating factor of 1.25 to allow for changes in
battery efficiency over time. The above calculation is in accordance with the recommendations in BS5839-1: 2002.