Transmitter User Manual


Transmitter is 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 hub. It is not intended to use the device in third-party systems.

Not compatible with the uartBridge or ocBridge Plus

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

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

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

Functional Elements

ajax transmitter
  1. QR code with the device registration key.
  2. Batteries contacts.
  3. LED indicator.
  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 motion, 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 power supply to the external detector from the module batteries with 3.3 V.

Connecting to the hub

Before starting connection:

  1. 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.
  2. Go to the Ajax application.
  3. Switch on the hub and check the internet connection (via Ethernet cable and/or GSM network).
  4. Ensure that the hub is disarmed  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

How to connect the Transmitter  to the hub:

  1. Select the Add Device option in the Ajax application.
  2. Name the device, scan/write manually the QR Code (located on the body and packaging), and select the location room.
  3. Select Add — the countdown will begin.
  4. Switch on the device (by pressing on/off button for 3 seconds).
ajax transmitter

For the detection and interfacing to occur, the device should be located within the coverage area of the wireless network of the hub (at a single protected object).

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.

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


  1. Devices
  2. Transmitter
TemperatureTemperature of the device. Measured on the processor and changes gradually
Signal StrengthSignal strength between the hub and the device
Battery ChargeBattery level of the device, displayed in increments of 25%
LidThe tamper terminal state
Delay when entering, secDelay time when entering
Delay when leaving, secDelay time when exiting
ConnectionConnection status between the hub and the Transmitter
Always ActiveIf active, the device is always in an armed mode
Alert if movedIt turns on the Transmitter accelerometer, detecting device movement
FirmwareDetector firmware version
Device IDDevice identifier


  1. Devices
  2. Transmitter
  3. Settings
First fieldDevice name, can be edited
RoomSelecting the virtual room to which the device is assigned
Contact status of the external detectorSelection of the external detector normal status:

  • Normally closed (NC)
  • Normally opened (NO)
Type of the external detectorSelection of the external detector type:

  • Pulsed
  • Bistable
Tamper modeSelection of the normal tamper mod for an external detector:

  • Normally closed (NC)
  • Normally opened (NO)
Always activeWhen the mode is active, the Transmitter transmits alarms even when the system is disarmed
Delay when entering, secSelecting delay time when entering
Delay when leaving, secSelecting delay time on exit
Delays in night modeDelay turned on when using night mode
Alert if movedThe accelerometer turning on the Transmitter to provide an alarm in the event of device movement
Power supply of the external detectorTurning the power on in 3.3 V external detector:

  • Disabled if hub is disarmed
  • Always disabled
  • Always active
Arm in night modeIf active, the device will switch to armed mode when using night mode
Activate the siren if an alarm is detectedIf active, HomeSiren and StreetSiren actuate if an alarm is detected
Signal Strength TestSwitches the device to the signal strength test mode
Attenuation TestSwitches the device to the signal fade test mode (available in detectors with firmware version 3.50 and later)
User GuideOpens the device User Guide
Unpair DeviceDisconnects the device 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 tamper mode, which can be normally closed or normally open.
  • The accelerometer-triggered alarm — you can turn this signal off or on.

Select the power mode for the external detector:

  • Turned off when the hub is disarmed — 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 disabled — 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 active — this mode should be used if there are any problems in the “Turned off when the hub is disarmed”. 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 active” or the “Turned off when the hub disarmed” mode, regardless of the security system status.


The Module is switched on and registeredThe LED lights up when the ON button is briefly pressed.
Registration failedLED 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 devicesLED blinks for 1 minute with an interval of 1 second, then blinks 3 times rapidly (and automatically switches OFF).
The Module has received alarm/tamper signalThe LED lights up for 1 second.
Batteries are dischargedSmoothly lights up and goes out 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 “Jeweller” settings in hub settings).

Signal Strength Test

Attenuation Test

Connection of the Module to the wired detectorа

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

Check the signal strength 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.

If, after moving, the device still has a low or unstable signal strength, use a radio signal range extender ReX.

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

  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

    ajax transmitter+ – — power supply output (3.3 V)
    ALARM — alarm terminals
    TAMP — tamper terminals

    IMPORTANT! Do not connect external power to the Transmitter’s power outputs. This may damage the device

  2. 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.

Battery Replacement

Tech Specs

Connecting a detectorALARM and TAMPER (NO/NC) terminals
Mode for processing alarm signals from the detectorPulse or Bistable
Power3 x CR123A, 3V batteries
Capability to power the connected detectorYes, 3.3V
Protection from dismountingAccelerometer
Frequency band868.0–868.6 MHz or 868.7 – 869.2 MHz, depends on sales region
CompatibilityOperates only with HubHub PlusHub 2 and ReX
Maximum RF output powerUp to 20 mW
Communication rangeUp to 1,600 m (any obstacles absent)
Ping interval for the connection with the receiver12–300 sec
Operating temperatureFrom -25°С to +50°С
Operating humidityUp to 75%
Dimensions100 x 39 x 22 mm
Weight74 g

Complete Set

  1. Transmitter
  2. Battery CR123A — 3 pcs
  3. Installation kit
  4. Quick Start Guide


Warranty for the “AJAX SYSTEMS MANUFACTURING” LIMITED LIABILITY COMPANY products is valid for 2 years after the purchase and does not apply to the pre-installed battery.

If the device does not work correctly, you should first contact the support service—in half of the cases, technical issues can be solved remotely!

Technical support: [email protected]

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