AJAX Transmitter manual | How to use the AJAX Transmitter

AJAX Transmitter Manual

Manual / Webshop / Installation

View all products in our webshop to buy online.

If you want the best security system in Spain installed by us, choose installation.

Follow the steps in the manual and install the AJAX Transmitter by yourself.

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.

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 Manual functional elements

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.

Transmitter Operating Principle

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 the Transmitter to the AJAX Security System

Connecting the transmitter 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.

5. Connect Socket to the power supply and wait for 30 seconds.

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 manual

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.

Values in the AJAX App

    AJAX Transmitter manual

Temperature: Temperature of the device. Measured on the processor and changes gradually

Signal Strength: Signal strength between the hub and the device

Battery Charge: Battery level of the device, displayed in increments of 25%

Lid: The tamper terminal state

Delay when entering, sec: Delay time when entering

Delay when leaving, sec: Delay time when exiting

Connection: Connection status between the hub and the Transmitter

Always Active: If active, the device is always in an armed mode

Alert if moved: It turns on the Transmitter accelerometer, detecting device movement

Firmware: Detector firmware version

Device ID: Device identifier



First field: Device name, can be edited

Room: Selecting the virtual room to which the device is assigned

Contact status of the external detector:
Selection of the external detector normal status:

- Normally closed (NC)

- Normally opened (NO)

Type of the external detector:
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 disarmed

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 device movement

Power supply of the external detector:
Turning the power on in 3.3 V external detector:

- Disabled if hub is disarmed

- Always disabled

- Always active

Arm in night mode: If active, the device will switch to armed mode when using night mode

Activate the siren if an alarm is detected: If active, HomeSiren and StreetSiren actuate if an alarm is detected

Signal Strength Test: Switches the device to the signal strength test mode

Attenuation Test: Switches the device to the signal fade test mode (available in detectors with firmware version 3.50 and later)

User Guide: Opens the device User Guide

Unpair Device: Disconnects 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 registered: The LED lights up when the ON button is briefly pressed.

Registration failed: LED 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: LED 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 signal: The LED lights up for 1 second.

Batteries are discharged: Smoothly lights up and goes out when the detector or tamper is activated.

Functionality 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 detector

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 manual

+ – — power supply output (3.3 V)

ALARM — alarm terminals

TAMP — tamper terminals
Do not connect external power to the Transmitter’s power outputs. This may damage the device

2. Secure the Transmitter in the case. Plastic bars are included in the installation kit. It is recommendable to install the Transmitter on them.

How to change batteries in the Transmitter

AJAX Transmitter manual

In order to change the battery Transmitter:

1. Switch off the device.

AJAX Transmitter manual
2. Change batteries for a new one of type CR123A (3 pcs), observing the polarity.

Never install used or damaged batteries.

3. Turn on the device and check the battery status using the app.

The battery status is not updated instantly but during the next polling of the devices (by default, every 36 seconds).

Complete Set

1. Transmitter

2. Battery CR123A — 3 pcs

3. Installation kit

4. Quick Start Guide

Tech Specs

  • Connecting a detector: ALARM and TAMPER (NO/NC) terminals
  • Mode for processing alarm signals from the detector: Pulse or Bistable
  • Power: 3 x CR123A, 3V batteries
  • Capability to power the connected detector: Yes, 3.3V
  • Protection from dismounting: Accelerometer
  • Frequency band: 868.0–868.6 MHz or 868.7 – 869.2 MHz, depends on sales region
  • Compatibility: Operates only with Hub, Hub Plus, Hub 2 and ReX
  • Maximum RF output power: Up to 20 mW
  • Modulation: GFSK
  • Communication range: Up to 1,600 m (any obstacles absent)
  • Ping interval for the connection with the receiver: 12–300 sec
  • Operating temperature: From -25°С to +50°С
  • Operating humidity: Up to 75%
  • Dimensions: 100 x 39 x 22 mm
  • Weight: 74 g
View all products in our webshop to install an alarm system yourself.

If you want the best security system in Spain installed by us, choose installation.