Fire-Lite AFM-16ATX User Manual page 10

Electrical Ratings
Input Voltage: 24 volts DC (power-limited).
Current Draw from 24 volt DC Input:
AFM-16ATX/AFM-32AX
AEM-16ATF/AEM-32AF
Data Communications Port: EIA-485 operating at 20 Kbaud (power-limited).
Annunciator Power Requirements
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 manual. However, if the current draw dedicated to the annunciators must be
calculated as a separate figure, use the equations below.
Number of AFM modules
The 0.040 amps can be reduced to 0.030 for modules
with Piezo Disable or Flash Inhibit modes selected.
Number of AEM modules
Sum Column A for Total Annunciator Standby Current =
Number of AFM and AEM modules assumed to be
in alarm simultaneously [
Entering the total Number of AFM and AEM modules in above will allow for the
simultaneous illumination of all LEDs. 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 AFM and AEM modules multiplied by the number of remote
annunciator locations, but do not enter less than one.
Sum Column B for Total Annunciator Alarm Current
The Total Annunciator Alarm Current cannot exceed 200 mA from the MPS-24BF, or
10
[ ] X 0.040
[ ] X 0.002
] X 0.018
1 amp from the MPS-24AF.
15390 Rev D 8/2/96 P/N 15390:D
Standby
0.040 amps 0.056 amps
0.002 amps 0.018 amps
Column A
=
=
Column B
=
=
Alarm
amps
amps
amps
amps
amps