Conventional Notification
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Devices in a zoned architecture are connected directly to a standard fire alarm control panel via dedicated circuits.
Alarm Activation: When a detector in a zone activates, the control panel immediately activates all notification devices in that zone, including strobe lights and audible alarms, to notify occupants immediately.
Simple Logic: Activation often works via short-circuiting the loop (e.g., a pull station)—a straightforward, proven technology.
Conventional Notification Devices are durable, cost-effective solutions that reliably alert occupants during emergencies. Perfect for small- to medium-sized buildings like offices, schools, retail outlets, and workshops, these devices include sirens, bells, horns, strobes, and combo units—ensuring both audible and visual alerts are clear and effective.
Zone-Based Alerts: Alerts are activated for entire zones, simplifying evacuation signaling.
Range of Devices: Options include sirens, bells, horns, strobes, and combination horn-strobes or speaker-strobes.
Straightforward Installation: Wiring is direct and less complex, making installation faster and maintenance easier.
Visual Alerts: Strobe lights provide critical visual warning, especially where hearing-impaired occupants or noisy environments are a concern.
Robust Design: Built to withstand continuous operation in a variety of conditions.
Cost-Effective: Lower initial investment and maintenance cost than addressable systems.
Simple to Operate: Easy to understand by building personnel, with intuitive zone-based alerts.
Reliable & Proven: Time-tested technology with exceptional track record in small buildings.
Low Maintenance: Straightforward component checks and fault detection—ideal for facilities without specialized staff.
From a hands-on installer:
“They’re fed by an amplifier not a power supply… speakers are wired just like any other notification device.”
| Resource Type | Details |
|---|---|
| Device Types | Sirens, bells, horns, strobes, horn-strobes, speaker-strobes |
| Wiring Setup | Zone-based NAC circuits; detection via short-circuit or analog trigger |
| Audibility Standards | NFPA 72 states minimum sound levels: at least 15 dB above ambient or 5 dB above peak noise at 5 ft for alert clarity |
| Testing & Maintenance | Monthly checks, biannual or annual testing, cleaning detectors, battery backup checks. |
| Compliance Standards | NFPA 72, local fire codes (e.g., IS3218 in India) |