Document # 50079 Rev. D 05/23/97
Page
8
1.7 General
The FCPS may be used in a number of different applications. It may be used as a
remotely-mounted power supply and battery charger where it can power up to four,
coded or non-coded, Notification Appliance Circuits. Alternately, any or all of these
circuits may be used as 24 VDC output circuits capable of powering four wire smoke
detectors or any device that requires filtered power. These circuits may be configured
as resettable or nonresettable outputs.
Notification
Appliance Circuit
Control Input #1
(from FACP)
Notification
Appliance Circuit
Control Input #2
(from FACP)
FCPS Trouble
Contact Output
Specific
Application
Power
Style Y/Style Z
Notification
Appliance Circuit or
24 VDC Output #1
Style Y Notification
Appliance Circuit or
24 VDC Output #2
Style Y/Style Z
Notification
Appliance Circuit or
24 VDC Output #3
Style Y Notification
Appliance Circuit or
24 VDC Output #4
Battery Charger
Figure 1-2: Simplified FCPS Block Diagram
One of the most common applications for the FCPS remote power supply utilizes the
NAC repeater feature. In this application, one or two Notification Appliance Circuits
(NAC) are connected from the main FACP NAC output(s) to the remote power supply
Control Input circuits. When these Control Input circuits activate (due to reverse polarity
of the NAC output), the power supply will activate its corresponding outputs. NAC
Control Input #1 controls power supply output circuits #1 and #2. NAC Control Input #2
controls output circuits #3 and #4 (refer to Figure 4-2).
During the inactive state, the remote power supply supervises its NAC field wiring for
short and open circuits. If a fault is detected, the supply will enter a trouble condition
and illuminate the corresponding NAC trouble LED (Output Circuits 1-4). However,
once the Notification Appliance Circuits are activated, the supervision is disabled and
the circuits are no longer supervised. Supervision of other power supply faults such as
low battery, Earth Fault, AC loss and battery charger failure will continue and may be
monitored via the trouble relay contact.
If a specific application requires that all four outputs activate at the same time, only one
NAC control input from the FACP is necessary. For this application, the Notification
Appliance Circuit from the FACP is wired into NAC Control Input #1 of the remote supply
and then a pair of wires are connected from NAC Control Output #1 to NAC Control Input
#2 (refer to Figure 4-3).
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