System Components & Architecture
Fire alarm control panels, initiating devices, notification appliances, annunciation, addressable vs conventional systems, and system types.
- Describe the function of a Fire Alarm Control Panel and its role as the system brain
- Differentiate between initiating devices and notification appliances
- Explain annunciation and the purpose of remote annunciators
- Compare addressable and conventional fire alarm system architectures
- Identify system types including local, monitored, and two-stage alarm configurations
Lesson 1
Fire Alarm Control Panels & Annunciation
The Fire Alarm Control Panel (FACP)
The Fire Alarm Control Panel (FACP) is the central brain of every fire alarm system. It provides the central control and monitoring of all initiating devices, notification appliances, power supplies, and signaling circuits. Every signal in the system - alarm, trouble, supervisory - flows through the FACP.
The FACP performs these essential functions:
- Receives signals from initiating devices (smoke detectors, pull stations, waterflow switches)
- Activates notification appliances (horns, strobes) during alarm conditions
- Monitors circuits for trouble conditions (opens, grounds, shorts)
- Provides power to field devices through SLC and NAC circuits
- Communicates with supervising stations (central monitoring)
- Controls auxiliary functions (elevator recall, door release, HVAC shutdown)
Annunciation
Annunciation is the display of alarm location and system status on the panel or a separate annunciator device. When a device activates, annunciation tells building personnel exactly where the alarm originated and what type of signal it is (alarm, trouble, or supervisory).
Remote Annunciators
A remote annunciator displays system status in a location remote from the main FACP. Common locations include building entrances, security desks, and fire command centers. Remote annunciators allow fire department personnel to immediately assess system status without traveling to the main panel room.
Main FACP
Full control of all system functions
Programming and configuration access
Battery backup and power supply
Located in electrical/mechanical room
Remote Annunciator
Display only - shows status and zone info
Limited controls (silence, reset may be available)
No batteries - powered from FACP
Located at building entrance/lobby
The FACP is the central hub providing control and monitoring of initiating, notification, power, and signaling functions. Annunciation displays alarm location and status. Remote annunciators provide system status at locations away from the main panel.