Installing the Control Panel Installation
NFS-640 Installation Manual P/N 51332:B1 12/01/2003 37
Figure 13 Mounting Single-space Blank Plate with Optional Module
Connecting the Power Cables
3.5.6 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, 3.0 A (NFS-640E uses 240 VAC, 50/60
Hz, 1.5 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
(2.00 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.
See Appendix B “Electrical Specifications” for details and overall installation guidelines.
3.5.7 Connecting the Control Panel to AC Power
Connect primary power as follows (see Figure 14 below):
1. Turn off the circuit breaker at the main power distribution panel.
2. Remove the plastic insulating cover from TB2.
3. Connect the service ground to terminal marked EARTH.
4. Connect the primary neutral line to terminal marked NEUTRAL and the primary Hot line to
terminal marked HOT.
5. Reinstall the plastic insulating cover over TB2.
!
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.
Single-space
blank plate
Fasten optional module to
the plate with four screws
(included).
tm4adp4.cdr
Mount optional module
onto standoffs on the
blank plate
Mount single-space blank plate
onto compatible dress panel or
backbox trim ring
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