In an addressable system, what ensures each device is uniquely identified?

• A. All initiating devices share a single address
• B. The panel assigns a random address to each device
• C. Each initiating device has a discrete and unique identification address; the panel can also include a tag to identify the address
• D. Devices have no address

Answer: (C)

Each device in an addressable system must carry its own unique identification so the control panel can distinguish signals from every device. This discrete address allows the panel to know exactly which device triggered an alarm, fault, or supervisory event, pinpoint its location, and log the event for maintenance or investigation. The panel may also include a tag or reference to help technicians map the address to a physical device. Having all devices share one address would prevent identification of the specific device, while random addresses could cause conflicts or misidentification, and having no address would make reliable communication impossible.