NFS2-640/E Installation Manual —
P/N 52741:P2 7/10/14
33
Connecting the Power Cables
Installation
Wire and fiber, or multi-mode and single-mode, can be mixed.
3.7 Connecting the Power Cables
3.7.1 Overview
Complete all mounting procedures and check all wiring before applying power. Electrical
connections include the following:
•
Primary AC power source – 120 VAC, 50/60 Hz, 5.0 A (with NFS2-640E use 240 VAC,
50/60 Hz, 2.5 A) from line voltage source. Overcurrent protection for this circuit must comply
with Article 760 of the National Electrical Code (NEC) and/or local codes. Use 12 AWG (3.31
mm
2
) wire (maximum) with a 600-volt rating.
•
Secondary power source – 24 VDC from batteries, installed in the control panel (or in an
optional battery cabinet). Secondary (battery) power is required to support the system during
loss of primary power.
•
External power sources – 24 VDC power for Smoke Detectors (4 wire), NACs, and
Annunciators.
•
Auxiliary power source – 24 VDC power @ 0.5 A and 5 VDC power @ 0.15 A from TB2 on
the CPS-24/E.
See Appendix B.1 “Electrical Specifications” for details and overall installation guidelines.
NUP
DAL
Optional Style 7 return
Low level analog audio
NUP
AA Series Audio Amplifiers
XPIQ, etc.
With DVC and
DVC-AO for
retrofits. DAL
(Digital Audio
Loop) not
compatible
with this
application.
With DVC,
NCA-2,
DAL, and
DVC-AO
for retrofits.
Figure 3.13 Block Diagrams of DVC Series Applications
2-640D
V1.wmf
2-640DV2.wmf
DVC
NFS2-640
NCA-2
DAL
Device
DAL
Device
DAL
Device
NUP
SLC
Low level
analog audio
NFS2-640
DVC
XPIQ
DVC-AO
DVC-AO
!
WARNING:
Remove all power sources to equipment while connecting electrical components. Leave the
external, main power breaker OFF until installation of the entire system is complete.
!
WARNING:
Several sources of power can be connected to the control panel. Before servicing the control panel,
disconnect all sources of input power
including the battery
. While energized, the control panel and
associated equipment can be damaged by removing and/or inserting cards, modules, or
interconnecting cables.
