Design Considerations
24 PN 15842:K 7/23/2002
Table 3-1 Current Draw Calculations
Non-Fire Alarm Status A: On-line LED is flashing; all other LEDs are off
Number of ACM-24AT/ACM-48A modules [_____] X 0.016 = [__________] amps
Number of AEM-24AT/AEM-48A modules [_____] X 0.002 = [__________] amps
Number of ACM-16AT/ACM-32A modules [_____] X 0.040 = [__________] amps
Note: The 0.040 amps can be reduced to 0.030 for ACM-16AT/ACM-32A modules
with Piezo Disable or Flash Inhibit modes selected.
Number of AEM-16AT/AEM-32A modules [_____] X 0.002 = [__________] amps
Non-Fire Alarm Status B: On-line LED is on; other LEDs are also on
Number of ACM-24AT/ACM-48A modules
assumed to have points active simultaneously[_____] X 0.070 = [__________] amps
Number of AEM-24AT/AEM-48A modules
assumed to have points active simultaneously[_____] X 0.056 = [__________] amps
Number of ACM-16AT/ACM-32A or
AEM-16AT/AEM-32A modules
assumed to have points active simultaneously[_____] X 0.018 = [__________] amps
Total Annunciator Standby Current = [__________] amp
Fire Alarm Status (All LEDs are assumed to be on)
Number of ACM-24AT/ACM-48A modules
assumed to be in alarm simultaneously [_____] X 0.070 = [__________] amps
Number of AEM-24AT/AEM-48A modules
assumed to be in alarm simultaneously [_____] X 0.056 = [__________] amps
Number of ACM-16AT/ACM-32A or
AEM-16AT/AEM-32A modules
assumed to be in alarm simultaneously [_____] X 0.018 = [__________] amps
Note: This entry assumes that all LEDs are lit simultaneously. When the alarm system
specification permits, calculations can be based on a 10% alarm loading capacity. For 10%
capacity, enter 10% of the total number of ACM and AEM modules multiplied by the
number of remote annunciator locations, but do not enter less than one.
Total Annunciator
Fire-Alarm Current = [__________] amp
Total Annunciator Standby Current +
Total Annunciator Fire-Alarm Current = [__________] amps
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