ARM Controllers in Smart Building Fire Alarm Systems

In large buildings, factories, shopping malls, subway stations, and similar environments, fire alarm systems need to collect real-time data from sensors such as smoke, temperature, and gas leak detectors, and quickly trigger audible and visual alarms, as well as activate smoke extraction and fire suppression equipment in the early stages of a fire.
Traditional fire alarm systems typically rely on microcontrollers or PLCs, which have limited functionality and protocol adaptability. In contrast, industrial controllers based on the ARM architecture, with their high-performance processors, rich interfaces, and low-power design, can more efficiently handle data acquisition, processing, and coordinated control.

System Architecture

ARM controllers can serve as the main fire alarm control unit or regional substations, working in coordination with sensors, actuators, and upper-level monitoring platforms.

Architecture Example:

• Sensing Layer: Smoke detectors, temperature detectors, infrared flame detectors, gas detectors, etc.
• Control Layer (ARM Controller):
  • Collects data from multiple sensors
  • Performs data preprocessing and anomaly detection
  • Controls audible and visual alarms, sprinklers, smoke extraction systems, etc.
• Network Layer: Supports communication protocols such as RS485/Modbus, CAN, Ethernet, 4G/5G, LoRa, NB-IoT, etc.
• Platform Layer: Building Management System (BMS), fire monitoring center, or cloud-based data analysis platform.

Functional Advantages of ARM Controllers

Multi-Protocol Integration

• Supports RS485/Modbus RTU, CAN, Ethernet/Modbus TCP, BACnet, MQTT, etc.
• Easily integrates with existing fire alarm control units and building automation systems.

Real-Time Data Processing and Edge Decision-Making

• High-performance ARM Cortex-A series processors (e.g., A7/A53/A55) enable rapid local data analysis.
• Edge computing allows independent triggering of alarms and coordinated actions during network disruptions.

High Reliability and Industrial-Grade Design

• Operates in a wide temperature range (-40°C to 85°C), with dustproof, moisture-proof, and anti-static features.
• Supports watchdog timers and power-loss protection to ensure uninterrupted operation during critical moments.

Remote Maintenance and Data Reporting

• Transmits fire event data in real-time to monitoring centers or cloud platforms via 4G/5G or Ethernet.
• Supports remote firmware upgrades (OTA) and parameter configuration.

Coordinated Control Capabilities

• Directly controls smoke extraction fans, emergency lighting, sprinkler pumps, etc.
• Supports multi-level coordination strategies (e.g., zoned triggering, delayed activation).

Application Scenarios

• Large Shopping Malls and Office Buildings: Centralized monitoring of fire alarm signals across multiple floors.
• Industrial Factories: Integrates gas and temperature detectors for dual prevention of fires and explosions.
• Subways and Tunnels: High-speed data acquisition and transmission to minimize fire response delays.
• Data Centers: Integrates with environmental monitoring systems to quickly protect critical IT equipment.

Typical Case Study 

A fire alarm solution centered on the BL330 ARM Edge Gateway:

• Connects to 64 RS485 fire detectors.
• Analyzes fire alarm signals locally and activates alarms and smoke extraction systems within 3 seconds.
• Synchronizes data to the fire command center via a 4G module and generates historical records.
• Supports remote maintenance and log queries.