FCPS-24S Series Instruction Manual — P/N 51977:J2 7/11/2014 13
General System Overview
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 provide up to four coded or noncoded, syn-
chronized or nonsynchronized NACs (Notification Appliance Circuits). Alternatively, output #4
can be used as a door holder circuit which will provide a steady 24 VDC output until an alarm con-
dition or AC fail condition causes it to drop to 0 VDC following a 10 second delay. All four out-
puts can also provide power.
One possible application for the FCPS remote power supply utilizes the NAC repeater feature. In
this application, one or two NACs are connected from the main FACP to the remote power supply
control input circuits. When the control input circuits are activated by the reverse polarity of the
NACs, the power supply will activate its corresponding output circuits as programmed by SW1
DIP switch configuration (refer to Table 3.1 on page 21).
During the inactive state, the remote power supply supervises its NAC field wiring for short and
open conditions. If a fault is detected, the power supply will enter a trouble condition and illumi-
nate the NAC Trouble LED. When the NACs are activated, the supervision is disabled and the cir-
cuits are no longer supervised (except for short circuit conditions). Supervision of other power
supply faults such as low battery, battery charger trouble, ground fault and AC loss will continue
and may be monitored via the power supply trouble relay.
If an application requires that all four outputs activate at the same time, only one NAC is required
from the FACP. For this application, the NAC is connected to control input circuit #1 and SW1
DIP switch is set for this operation.
Style Y NAC
or Door
Holder Power
Output #4
AC Power
Figure 1.2 Simplified FCPS Block Diagram
Battery Charger
Style Y NAC
Output #3
Style Y NAC
Output #2
Style Y NAC
Output #1
Note: All NAC
outputs can be
converted to Style Z
with a ZNAC-4
option module
FCPS Trouble
Contact Output
24 VDC Specific
Application Power
NAC Control
Input #2
(from FACP)
NAC Control
Input #1
(from FACP)
Sync. Input
Input/Output Functions are Programmable
by SW1 DIP Switch Settings
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