In an addressable fire alarm system, every detector, manual call point, sounder, and module receives an individual numerical address. The control panel uses this address to identify the device, display its assigned location, report faults, and apply programmed actions. Addresses may be assigned manually, through self-addressing, or automatically by device ID or loop position.
Device addressing is one of the main differences between conventional and addressable fire alarm systems. A conventional panel identifies the affected zone, while an addressable panel communicates with each device individually.
Why Does Every Device Need an Address?
An address allows the panel to distinguish one device from every other device connected to the loop.
When a detector activates, the panel can display information such as:
Loop 1, Address 37: Smoke Detector, Meeting Room 2
The same principle applies to faults, contamination warnings, disabled devices, manual call points, sounders, and input-output modules. Correct addressing therefore supports faster alarm investigation, easier maintenance, and precise cause-and-effect programming.
Each device must have a valid address that is not already used by another device on the same loop. The available address range depends on the fire alarm system. Teletek TTE loops, for example, support addresses from 1 to 250.
Device Addressing Methods Compared
There are 4 main options when it comes do device addressing. We will go into detail for each of them further down this article, but to get things started, here is a short overview:
Method
How it works
Key Benefits
MAIN LIMITATIONS
Manual Addressing
Devices receive an address individually
Complete control over numbering
Slower and dependent on accurate records
Self-Addressing
Devices are connected one at a time and receive the next free address
Easy connection between address and physical location
Requires sequential installation
Automatic by ID
Panel detects installed devices and assigns addresses by their IDs
Fast and suitable for devices without isolators
Numbering may not follow the wiring route
Automatic by isolator
The panel addresses devices according to their position on the loop
Fast, logical cable sequence, and branch identification
Requires isolators throughout the loop
What Are the Main Device Addressing Methods?
1. Manual Addressing
With manual addressing, the installer assigns a selected address to each device before or during installation. This may be done through the fire alarm panel, a handheld programmer, or a loop testing tool.
The installer can follow the system drawings and deliberately assign addresses according to floors, rooms, or device groups. This provides full control over the numbering and makes the final configuration easier to compare with the project documentation.
The disadvantage is the time required. Every device must be handled individually, recorded correctly, and checked to prevent duplicated or missing addresses.
Manual addressing is therefore practical for small systems, replacements, or the addition of several new devices, but it can become inefficient on a loop containing hundreds of devices.
The SensoIRIS Programmer, for example, can read and write device addresses and configure selected parameters before a device is added to the system.
2. Self-Addressing
Self-addressing combines automatic address assignment with a controlled installation sequence.
The installer starts the self-addressing procedure at the panel, which displays the next available address. Devices are then mounted or connected one at a time. Each newly connected device receives the displayed address, after which the panel automatically moves to the next free number.
This method makes it easier to connect each address with its physical location because the installer controls the order in which devices are added. It also reduces the risk of accidentally assigning the same address twice.
However, the devices must be connected sequentially. If they have already been mounted throughout the building, self-addressing may require additional coordination between the engineer at the panel and the installers working around the site.
3.Automatic Addressing by Device ID
With automatic addressing by ID, all devices can first be installed on the loop without individual operational addresses. The panel then detects them and assigns addresses during one automatic procedure.
In Teletek systems, the process follows the devices’ ID numbers and groups them by device type, beginning with detectors, followed by sounders, manual call points, and modules. It is particularly useful when the loop includes devices without built-in isolators.
The main benefit is speed. Installers do not have to connect every device separately during the addressing process.
The limitation is that the assigned numerical order may not follow the physical route of the cable or the room sequence. The commissioning engineer must therefore carefully match every detected device with its actual location before completing the system configuration.
4. Automatic Addressing by Isolator
Automatic addressing by isolator allows the panel to assign addresses according to the physical order of devices along the loop.
The panel begins at one side of the loop and addresses each device sequentially. Where supported, it can also identify branches and continue the numbering through each branch before returning to the main loop.
This produces an address sequence that more closely reflects the wiring route, which can simplify commissioning and future troubleshooting.
The method requires every device to have a built-in isolator, or an appropriately connected isolator where the device design permits it. The resulting address sequence still follows the cable path rather than room numbers, so the locations must be verified and labelled correctly.
Често задавани въпроси
No. During self-addressing, devices are connected individually and receive addresses one by one. During automatic addressing, the devices can already be installed, and the panel performs the addressing process across the complete loop.
Not by itself. The panel assigns an operational address and identifies the device type, but the installer must still match that device with its actual room or location.
Yes. Addresses can generally be changed through the panel or an appropriate programming tool. The device label, panel description, drawings, zones, and any related cause-and-effect programming should then be reviewed and tested.
No. Conventional devices are connected to zone circuits and are identified collectively by zone. Individual device addressing is a feature of addressable fire alarm systems.
