What information is uniquely provided by addressable fire alarm units?

• A. The specific unit that triggers
• B. The maximum number of devices in the system
• C. The central monitoring station address
• D. The color coding of devices

Answer: (A)

The essential feature of addressable fire alarm units is that each device has a unique address the control panel uses to identify exactly which unit is involved. When a detector or other device goes into alarm or reports a fault, the panel reads that device’s address and immediately shows which specific unit triggered or needs attention. This precise, device-by-device identification is what makes the information uniquely provided by addressable units: you know the exact unit and its status, not just a general zone.

This capability also supports device-level diagnostics and maintenance, so technicians can target the specific device that requires service. In contrast, the other items aren’t tied to a particular triggering device: the maximum number of devices is a system design limit, the central monitoring station address is external to the devices, and color coding is simply a physical or organizational convention rather than device-identified information.