ACS Manual —
P/N 15842:
N3
5/4/2022
17
Annunciator Power Requirements & Electrical Ratings
Design Considerations
4.6 Annunciator Power Requirements & Electrical Ratings
Annunciators draw their power from the control panel and must be considered when calculating the primary and secondary power supply
requirements for the system. Each annunciator module is accounted for in the power calculations outlined in the respective installation man-
ual. However, if the current draw dedicated to the annunciators must be calculated as a separate figure, use the equations in Table 4.1.
Electrical Ratings
•
Input Voltage: 24 VDC (must be power-limited and non-resettable).
Use a regulated, power-limited, compatible power supply that is UL/ULC-Listed for Fire Protective Signaling use.
•
Data Communications Port: EIA-485 operating at 20 Kbps (must be power-limited).
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
1
1
The 0.040 amps can be reduced to 0.030 for ACM-16AT/ACM-32A modules with Piezo Disable or Flash Inhibit
modes selected.
= [_________] amps
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
= [_________] amps
Fire Alarm Status (All LEDs are assumed to be on)
2
2
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.
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
Total Annunciator Fire-Alarm Current
= [_________] amps
Total Annunciator Standby C Total Annunciator Fire-Alarm Current
= [_________] amps
Table 4.1
Current Draw Calculations