Hardware Installation—Installing the IFC-1010/2020
43
This column allows the user to calculate the current that will be drawn
from the MPS-24A or MPS-24AE during a non-fire alarm condition, with
AC power applied. This current draw cannot exceed 3.0 amperes.
The last column of Table 5 allows the system designer to calculate the
secondary non-fire alarm current. This is the current that will be drawn
from the MPS-24A or MPS-24AE power supply in a non-fire alarm
condition during AC power loss. This figure is required to complete the
standby battery calculations. After adding up all the individual current
draws, the total figure is then transferred to Table 7.
Notes:
•
Typically, a system should be designed around the capacity to activate
all output circuits and relays, and support fire alarms on no less than
10% of initiating device circuits (subject to the requirements of the
Local Authority Having Jurisdiction [LAHJ]).
•
Concerning four wire detectors: In Table 5, the current to be entered
for four wire smoke detectors is the manufacturer’s rated fire alarm
current minus the manufacturer’s rated non-fire alarm current.
•
Concerning notification appliances: The MPS-24A or
MPS-24AE provides a regulated supply for notification appliance
circuits, permitting the use of any 24 VDC notification appliances
UL Listed for Fire Protective Signaling. Enter into Table 5 the
respective current draws of notification appliances and other external
devices to be powered by the MPS-24A or MPS-24AE during a fire
alarm.
N35
•
No more than 3.0 amperes of current can be drawn from
Terminals 3 and 4 of TB3.
•
Security Alarms are treated as trouble (non-fire alarm) conditions in
the IFC-1010/2020.
Primary,
Non-Fire Alarm
Current
(amperes)
Secondary,
Non-Fire Alarm
Current
(amperes)
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