Conventional Fire Alarm Control System (CFACS)

System Overview

The AGNI Conventional Fire Alarm Control System (CFACS)  is a reliable, cost-effective, and proven fire detection and notification solution designed to provide early warning of fire conditions within buildings or facilities.
This system divides the protected premises into multiple detection 2 to 120 zones, where each zone is monitored for the presence of smoke, heat, or manual call point activation. Upon detection of a fire condition, the system triggers audible and visual alarms and displays the affected zone on the Fire Alarm Control Panel (FACP) for quick identification and response.
Conventional systems are best suited for small to medium installations, such as offices, commercial spaces, warehouses, educational institutions, and low-rise buildings.
innovation in fire alarm system

Operating Principle

Each detection zone in the system is a separate circuit consisting of automatic detectors (smoke/heat) and manual call points (MCPs) connected in parallel.
When a detector senses smoke or heat, or when an MCP is activated, the resistance in that zone circuit changes.
The Fire Alarm Control Panel detects this change and initiates an alarm condition for the corresponding zone.
The panel then activates connected alarm notification devices (sounders, strobes, bells) and displays the zone number and alarm indicator on the control panel.
The system can also monitor for open circuit or short circuit faults, displaying corresponding fault indications to ensure full supervision and system reliability.

System Components

Component

Description

Fire Alarm Control Panel (FACP)

Central processing unit that monitors all detection zones, provides visual and audible indications of alarm/fault conditions, and controls output devices.

Smoke Detectors

Photoelectric or ionization type detectors that sense smoke particles and trigger an alarm.

Heat Detectors

Fixed temperature or rate-of-rise type detectors that respond to rapid temperature increases or thresholds.

Manual Call Points (MCPs)  

Break-glass or resettable units for manual fire alarm activation. 

Sounders / Bells / Strobes

Audible and visual alarm notification devices activated by the FACP during fire conditions.

End-of-Line (EOL) 4.7 k ohm Resistors 

Installed at the end of each detection and sounder circuit to enable system supervision.

Power Supply & Battery Backup

Provides 24V DC output with automatic charging and backup power for at least 24 hours standby + 30 minutes alarm operation.

System Features

  • Zone-based fire detection for easy localization of alarms.
  • LED indications for Power, Fire, Fault, Silence, and Test.
  • Supports typically 2, 4, 8, or 120 zones (expandable depending on model).
  • Each zone can accommodate multiple detectors and call points (as per design load).
  • Alarm sounder circuits (2 or more) with silence and resound functions.
  • Supervised circuits for open, short, and ground fault detection.
  • Relay outputs for fire, fault, and supervisory conditions.
  • Battery monitoring and charger supervision.
  • Key-operated or password-protected controls for authorized access.
  • Evacuation and test modes for maintenance and commissioning.
  • Optional interface modules for integration with building systems (e.g., elevators, HVAC, sprinklers).

Technical Specifications

Parameter

Typical Specification

System Type

Conventional, Non-addressable

Zone Capacity

2, 4, 8, 120 zones (expandable)

Operating Voltage

220–240V AC, 50/60Hz

System Operating Voltage

24V DC nominal

Detection Circuit Supervision

Open/short circuit monitored

Notification Circuit Supervision

Monitored with EOL resistor

Battery Backup

24V sealed lead-acid battery

Standby Duration

24 hours minimum

Alarm Duration

30 minutes minimum

Output Contacts

Fire (NO/NC), Fault (NO/NC), Common Alarm

Enclosure Rating

IP30 or higher

Operating Temperature

0°C to 55°C

Relative Humidity

Up to 95% non-condensing

Compliance

EN 54-2, EN 54-4, UL 864, LPCB 

Advantages

  • Simple and reliable — proven technology with minimal configuration.
  • Cost-effective — ideal for smaller facilities with limited zones.
  • Easy installation and commissioning — standard two-wire connections per zone.
  • Quick fault identification — zone-level fire and fault LEDs.
  • Flexible integration — can trigger external systems (e.g., suppression release, HVAC shutdown).
  • Low maintenance requirements — straightforward periodic testing.

Typical Applications

  • Small to medium commercial buildings
  • Office complexes and retail outlets
  • Educational institutions
  • Industrial workshops and warehouses
  • Residential complexes and dormitories
  • Hotels, restaurants, and healthcare facilities
  • Parking areas and utility rooms

Standards and Compliance

The Conventional Fire Alarm Control System and its components are typically designed and certified in accordance with:
01.

EN 54-2

Fire detection and fire alarm systems: Control and indicating equipment

02.

EN 54-4

Power supply equipment

03.

UL 864

Control Units and Accessories for Fire Alarm Systems

04.

BS 5839 Part 1

Fire detection and alarm systems for buildings

05.

NFPA 72

National Fire Alarm and Signaling Code

06.

LPCB, CE, and RoHS Certified