Which device is a conventional-addressable detector?

Which device is a conventional-addressable detector?

• A. Transmits the alarm by code (by device not circuit)
• B. Transmits the alarm by increasing current on the circuit (by circuit not device)
• C. Transmits the alarm by code on a separate data line
• D. Reduces detectors to sensors

Answer: (A)

The key idea is that an addressable detector carries and transmits its own identifying code when it alarms. This lets the control panel know exactly which device triggered the event, rather than just indicating that a particular zone is active. In a conventional setup, alarms are conveyed to the panel by changes on the circuit as a whole, not by the device itself, so device-level identity isn’t conveyed. Therefore, transmitting the alarm by code from the device itself best describes a conventional-addressable detector. The other descriptions imply signaling without identifying the specific detector, or describe signals that aren’t meaningful in this context.

The key idea is that an addressable detector carries and transmits its own identifying code when it alarms. This lets the control panel know exactly which device triggered the event, rather than just indicating that a particular zone is active. In a conventional setup, alarms are conveyed to the panel by changes on the circuit as a whole, not by the device itself, so device-level identity isn’t conveyed. Therefore, transmitting the alarm by code from the device itself best describes a conventional-addressable detector. The other descriptions imply signaling without identifying the specific detector, or describe signals that aren’t meaningful in this context.