10
15390 Rev D 8/2/96 P/N 15390:D
Electrical Ratings
Input Voltage: 24 volts DC (power-limited).
Current Draw from 24 volt DC Input:
Standby
Alarm
AFM-16ATX/AFM-32AX
0.040 amps
0.056 amps
AEM-16ATF/AEM-32AF
0.002 amps
0.018 amps
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.
Column A
Number of AFM modules [ ] X 0.040
=
amps
The 0.040 amps can be reduced to 0.030 for modules
with Piezo Disable or Flash Inhibit modes selected.
Number of AEM modules [ ] X 0.002
=
amps
Column B
Sum Column A for Total Annunciator Standby Current =
amps
Number of AFM and AEM modules assumed to be
in alarm simultaneously [ ] X 0.018
=
amps
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
=
amps
The Total Annunciator Alarm Current cannot exceed 200 mA from the MPS-24BF, or
1 amp from the MPS-24AF.
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