Connecting Power Sources and Outputs Section 3 Installation
NFS-3030 Installation PN 51330:C 10/28/2003 39
3.15 Connecting Power Sources and Outputs
Overview
Complete all mounting procedures and check all wiring before applying power. Electrical connections
include the following:
• Primary power source. +24VDC, delivered through AMPS-24/AMPS-24E main power supply.
If AMPS-24/E is mounted in a separate cabinet, power-supply wiring must be in conduit (for
cabinet placement information see Section 3.4 “Laying Out Equipment in Cabinet and Chassis”
and the AMPS-24/E manual.
• 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. +24VDC auxiliary power supplies that are UL/ULC-listed for fire
protective service.
• Accessory power for peripheral devices. TB6 on the CPU draws power from primary,
secondary and external sources to supply a maximum of 1.0 amp of +24 VDC power to devices
within the same enclosure as the CPU. If those devices have outputs, the outputs must be power-
limited.
Note: The CPU ships with an insulator to prevents its lithium battery from discharging. To preserve the
battery, this insulator should be left in place as long as possible before applying AC power. Some
installers may find it convenient to remove the insulator before mounting all equipment.
Note: If using multiple power supplies with one set of batteries, refer to main power supply manual for
connection requirements.
Connecting the Power Supply
Connect J13 Power on the CPU to TB2 on AMPS-24/E with Cable 75591 (see Figure 28). This cable is
20 feet long, and must run in conduit between the backbox containing the fire alarm control panel and
the backbox containing the AMPS-24/E. See AMPS-24/E manual for full details and installation
precautions.
In order to conserve batteries, connect AC power and check it before connecting batteries. Follow the
procedures specified in the power supply manual.
!
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.
!
b
WARNING: Auxiliary power supply connections to ICM-4RK/ICE-4 must come from a power
supply whose battery terminals are tied back to those on the main power supply. Failure to do so
will cause panel circuit trouble at the control panel and possible equipment damage.