Fire-Lite MS-2410BC Conventional Control Panel - Manual (Page 18)

Optional Accessories
18 Document #50801 Rev.C 12/14/01 P/N 50801:C
One of the most common applications for the FCPS-24F remote power supply utilizes the NAC expander mode.
In this application, one or two Notification Appliance Circuits (NACs) 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.
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 independent 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 the FCPS-24F Installation, Operation and Application Manual for a complete
description and examples of applications.