Tech specs

HomeSiren Fibra

Wired siren


Compatible hub models


Fibra communication technology

Proprietary wired communication technology.
Fibra combines the reliability of wires with the freedom of radio connection.
It features:
  • Two-way communication.
  • Advanced anti-sabotage.
  • Instant notifications.
  • Remote configuration via the Ajax apps.

Line connection

4-core cable

Fibra line length

up to 6,500 ft
When using the U/UTP cat.5 twisted pair.
Encrypted communication

Key features

Alarm type

acoustic and LED
Buzzer and LED.

Type of warning device


Alarm volume

from 81 to 105 dB at a distance of 3.3 ft
Adjusted by PRO or user with admin rights in the Ajax app.

Alarm duration

from 3 s to 3 min
Adjusted by a PRO or user with admin rights in the Ajax app.

Siren sound frequency

3.4 ± 0.5 kHz

Additional LED connection

3 V
An external LED works in parallel with the LED built into
the siren and fully replicates its indication.


The siren makes a special sound to notify that the opening detectors
are triggered when the system is disarmed.

Events indication

  • Alerts.
  • Entry/exit delays.
  • Security mode.
  • Security mode changing.
  • After-alarm indication.


The siren is designed for indoor use only.
Recommended installation height is 8.2 ft and higher.

Sabotage protection

Tampering alarm

Alerts of attempts to detach the siren from the surface or remove the mounting panel.

Protection against forgery

device authentication

Power supply

Siren’s operating voltage range

7−27 V⎓
HomeSiren Fibra doesn't have any battery, the device has only a remote power source from the control panel.

Siren’s nominal operating voltage

24 V⎓

Maximum siren’s current consumption at nominal voltage

70 mA

Quiescent siren’s current consumption at nominal voltage

66 µA

Peak siren’s current consumption at nominal voltage

77 mA
When the siren sounds at the Very Loud volume level.

Average siren’s current consumption at nominal voltage

65 µA
When the siren sounds at the default volume level. Regardless of the arming mode.



3.56″ × 3.56″ × 1.30″


2.96 oz

Operating temperature range

from 14 °F to 104 °F

Operating humidity

up to 75%

Protection class




Complete set

HomeSiren Fibra
SmartBracket mounting panel
Installation kit
Quick Start Guide

Additional information

Compliance with standards


24 months

User manual