Fire-Lite LDM-32F Lamp Drivers - Manual (Page 32)

5. Electrical Ratings and Current Calculations Calculating Standby and
32
LDM-32F PN 50055:C 03/20/01
Calculating Standby and Alarm Currents
The LDM series annunciators draw their power from the Fire Alarm Control
Panel and must be considered when calculating primary and secondary power
requirements. Refer to the installation manual for the particular control panel
employed for the calculation of power requirements for the entire system.
1. Enter Standby Total obtained here into the standby calculation tables of
the installation manual.
2. Enter Alarm Current Total obtained here into the alarm calculation tables
of the installation manual.
Table 3 Power Requirement Calculations
Standby Current
Number of LDM-32F Modules [ ]
X 40 mA
1
=
1. The 0.040 amps can be reduced to 0.030 for modules with Piezo disable or Flash Inhibit selected.
Number of LDM-E32F Expanders [ ] X 2 mA =
Standby Total = [ ] amps
Alarm Current
Number of LDM-32F Modules [ ] X 56 mA =
Number of LDM-E32F Expander [ ] X 18 mA =
Number of LEDs
2
2. Use this line for calculations if LEDs are powered from 24 VDC source.
[ ] X [ ]mA per LED=
Number of LEDs
3
3. Use this line for calculations if LEDs are powered from the 5 VDC source from J1 on the LDM-32F.
[ ] X [( )mA/3]=
Alarm Current Total = [ ] amps