12 NFS-320/E/C Installation Manual — P/N 52745:M2 7/1/14
System Overview System Components
Figure 2.1 NFS-320/E/C System, Shown
with Door Open
2.2.3 Main Power Supply CPS-24/E
The main power supply is an integral part of the NFS-320/E/C and mounts directly over the control
panel’s circuit board. It provides a total of 3.9 A (7.4 A in alarm) and contains an integral battery
charger. This can be used for many functions including:
• Powering the NFS-320/E/C
• Powering a variety of UL-listed 24 VDC
notification appliances from four built-in
NAC outputs
• Providing up to 1.25 A of resettable power
for four-wire smoke detectors
• Providing up to 1.25 A of non-resettable
power for external devices such as the
TM-4 Transmitter Module
• Providing auxiliary 24 VDC power @ 0.5
A and 5 VDC power @ 0.15 A
• Fuse: 8 amps, 250 V, 5 x 20 mm, Fast
Acting, ceramic, p/n 12117
See Figure 2.2, “NFS-320 and Power-Supply: Wiring Connections” and Figure 2.3, “NFS-320 and
Power-Supply: Jumpers, LEDs and Switches” for details.
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