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πŸ“˜ Transmitter User Manual

Transmitter β€” a module for connecting third-party detectors to Ajax security system. It transmits alarms and warns about the activation of the external detector tamper and it is equipped with own accelerometer, which protects it from dismounting. It runs on batteries and can supply power to the connected detector.

Transmitter operates within the Ajax security system, by connecting via the protected Jeweller protocol to the Ajax Hub. It is not intended to use the device in third-party systems.Β 

Not compatible with the Ajax uartBridge or Ajax ocBridge Plus

The communication range can be up to 1,600 meters provided that there are no obstacles and the case is removed.Β 

The Transmitter is set up via a mobile application for iOS and Android-based smartphones.Β 

The Ajax security system is self-sustaining, but the user can connect it to the central monitoring station of a security company.

Functional Elements

  1. QR code with the device registration key
  2. Batteries contacts
  3. Light indicators.
  4. ON/OFF button
  5. Terminals for detector power supply, alarm and tamper signals

Operation procedure

The Transmitter serves for connecting the external alarm sources to Ajax system: indoor and outdoor detectors tracking movements, opening, vibrations, breaks, fire, gas, leakage, etc. Compatible with detectors with NC/NO contacts.

Transmitter receives information about alarms and the activation of the external detector tamper button through the terminals. A separate pair of terminals ensures the power supply to the external detector from the module batteries with 3.3 V.

Connecting to the Hub

Before starting connection:

  • Following the Hub instruction recommendations, install the Ajax application on your smartphone. Create an account, add the Hub to the application, and create at least one room.
  • Go to the Ajax application.
  • Switch on the Hub and check the internet connection (via Ethernet cable and/or GSM network).
  • Ensure that the Hub is in disarmed mode and does not start updates by checking its status in the mobile application.

⚠️ Only users with administrative privileges can add the device to the hub.

For the detector to start working within the Ajax security system, it needs to be connected to the Ajax Hub. This will require an Ajax account, a device with Internet access and the Ajax Security System application, as well as a room for placing the detector, created within the application.

The device may only be added if the Ajax security system is disarmed.

  1. Open a room in the mobile application or web application and select the option "Add a device".
  2. Give an arbitrary name to the detector, read out scan the QR code (or insert the ID manually), select a location room and go to the next step.
  3. When the application starts searching for a device and launches countdown, switch on the detector - it will blink once with an LED.

The Transmitter is connected to the Hub and set up via the Ajax Security system mobile application. To establish connection please locate the module and the Hub within the communication range and follow the device adding procedure.

Request for connection to the Hub is transmitted for a short time at the time of switching on the device.

If the connection to the Ajax Hub failed, the Transmitter will switch off after 6 seconds. You may repeat the connection attempt then.Β 

The Transmitter connected to the Hub will appear in the list of devices of the hub in the application. Update of the siren statuses in the list depends on the device inquiry time set in the hub settings, with the default value - 36 seconds.



Temperature of the device. Measured on the processor and changes gradually
Signal Strength
Signal strength between the Hub and the detector
Battery Charge
Battery level of the detector, displayed in increments of 25%
The tamper terminal state
Delay when entering, sec
Delay time when entering
Delay when leaving, sec
Delay time when exiting
Connection status between the Hub and the detector
Always Active
When turned on, the sensor is always in an armed mode
Alert if moved
It turns on the Transmitter accelerometer, detecting device movement
Detector firmware version
Device ID
Device identifier

Setting Up the Detector


First field
Detector name, can be edited
Selecting the virtual room to which the device is assigned
Contact status of the external sensor
Selection of the external detector normal status:
  • Normally closed (NC)
  • Normally opened (NO)
Type of the external sensor
Selection of the external detector type:
  • Pulsed
  • Bistable
Tamper mode
Selection of the normal tamper mod for an external detector:
  • Normally closed (NC)
  • Normally opened (NO)
Always active
When the mode is active, the Transmitter transmits alarms even when the system is not armed
Delay when entering, sec
Selecting delay time when entering
Delay when leaving, sec
Selecting delay time on exit
Delays in night mode
Delay turned on when using night mode
Alert if moved
The accelerometer turning on the Transmitter to provide an alarm in the event of sensor movement
Power supply of the external detector
Turning the power on in 3.3 V external detector:
  • Disabled if Hub is armed
  • Always disabled
  • Always active
Arm in night mode
When turned on, the detector will switch to armed mode when using night mode
Activate the siren if an alarm is detected
Whether the siren is turned on during the Transmitter alarm
Signal Strength Test
Switches the detector to the signal strength test mode
Signal Fade Test
Switches the detector to the signal fade test mode (available in detectors with firmware version 3.50 and later)
User Guide
Opens the detector User Guide
Unpair Device
Disconnects the detector from the Hub and deletes its settings

Set the following parameters in the Transmitter settings:

  • The state of the external detector contact, which can be normally closed or normally open.
  • The type (mode) of the external detector that can be bistable or pulse.
  • The state of the anti-tamper switch, which can be normally closed or normally open.
  • The accelerometer-triggered alarm β€” you can turn this signal off or on.

Select the power mode for the external detector:

  • Turned off when the Hub is not armed β€” the module stops powering the external detector upon disarming and does not process signals from the ALARM terminal. When arming the detector, the power supply resumes, but the alarm signals are ignored for the first 8 seconds.
  • Always off β€” the Transmitter saves energy by turning off the power of the external detector. The signals from the ALARM terminal are processed both in the pulse and bistable modes.
  • Always on β€” this mode should be used if there are any problems in the "Turned off when the Hub is not armed" mode. When the security system is armed, signals from the ALARM terminal are processed no more than once in three minutes in the pulse mode. If the bistable mode is selected, such signals are processed instantly.

If the "Always active" operating mode is selected for the module, the external detector is powered only in the "Always on" or the "Turned off when the Hub is not armed" mode, regardless of the security system status.


The Module is switched on and registered
Light is illuminated when the ON button is briefly pressed
Registration is not successful
Light blinks for 4 seconds with an interval of 1 second, then blinks 3 times rapidly (and automatically switches OFF)
The Module is deleted from the list of hub devices
Light blinks for 1 second with an interval of 1 second, then blinks 3 times rapidly (and automatically switches OFF)
The Module has received alarm/tamper signal
Light is illuminated for 1 second
Batteries are fully discharged
Gradually goes ON and OFF when the detector or tamper is activated

Performance testing

The Ajax security system allows conducting tests for checking the functionality of connected devices.

The tests do not start straight away but within a period of 36 seconds when using the standard settings. The test time start depends on the settings of the detector scanning period (the paragraph on β€œJeweller” settings in Hub settings).

  • Signal Strength Test
  • Signal Fade Test

The connection of the Module to the wired detector

Location of the device determines its remoteness from the Hub and the presence of any obstacles between the devices, hindering the radio signal and sound transmission: walls, inserted floors, large-size objects located within the room.

Check the signal level at the installation location

If the signal level is one division, we cannot guarantee stable operation of the security system. Take possible measures to improve the quality of the signal! As a minimum, move the device - even 20 cm shift can significantly improve the quality of reception.

The Transmitter should be encased inside the wired detector case. The Module requires a space with the following minimum dimensions: 110 Ρ… 41 Ρ… 24 mm. If the installation of the Transmitter within the detector case is impossible, then any available radiotransparent case could be used.Β 

  1. Connect the Transmitter to the detector through the NC/NO contacts (choose the relevant setting in the application) and COM.

    The maximum cable length for connecting the sensor is 150 m (24 AWG twisted pair). The value may vary when using different type of cable.

    The function of the Transmitter's terminals
    + - β€” power supply output (3.3 V)
    IMPORTANT! Do not connect external power to the Transmitter's power outputs. This may damage the device.
    ALARM β€” alarm terminals
    TAMP β€” tamper terminals
  2. Secure the Transmitter in the case. Plastic bars are included in the installation kit. It is recommendable to install the Transmitter on them.

Maintenance and Battery Replacement

The device does not require maintenance when mounted in the housing of a wired sensor.

πŸ‘‰πŸ» Battery Replacement

Tech specs

Connecting a detector
ALARM and TAMPER (NO/NC) terminals
Mode for processing alarm signals from the detector
Pulse or Bistable
3 x CR123A, 3V batteries
Capability to power the connected detector
Yes, 3.3V
Protection again dismounting
Frequency band
868.0 – 868.6 MHz or 868.7 – 869.2 MHz depending on the region of sale
Maximum RF output power
Up to 20 mW
Modulation of the signal
Radio signal range
Up to 1,600 m (any obstacles absent)
Ping interval for
the connection with the Hub
12 – 300 sec
Operating temperature
From -25Β°Π‘ to +50Β°Π‘
Operating humidity
Up to 80%
100 x 39 x 22 mm
74 g

Complete Set

  1. Transmitter
  2. Battery CR123A β€” 3 pcs
  3. Installation kit
  4. Quick Start Guide


Warranty for the Ajax Systems Inc. devices is valid for 2 years after the purchase and does not apply to the supplied battery. If the device does not work correctly, you should first contact the support service β€” in half of the cases, technical issues can be solved remotely!

πŸ‘‰πŸ» The full text of the warranty

πŸ‘‰πŸ» User Agreement

Technical support:

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