DoorProtect - User Manual
DOORPROTECT USER MANUAL DoorProtect is a door opening sensor device for windows and doors, designed for use inside premises. The device can operate for up to 7 years thanks to its built-in battery. It also features a sealed reed relay capable of handling over 1 million opening and closing cycles. It also has a connection pin...
DoorProtect User Manual

DoorProtect is a door and window opening sensor designed for indoor use. It boasts a battery life of up to 7 years and features a sealed reed relay capable of handling over 1 million opening and closing cycles. It also includes a connector for external sensors.
A reed relay is a device that creates a continuous loop under the influence of a continuous magnetic field. It consists of multiple ferromagnetic contactors housed together in a glass bulb.
DoorProtect operates within the Ajax security system by connecting via the Jewellery protocol to the Hub. The connection range is up to 1200m in an unobstructed environment. Additionally, the device can be used with third-party central processing units via integrated uartBridge and ocBridge Plus modules.
The sensor device is set up via a mobile app for iOS and Android. Users will receive notifications about all events via push messages, SMS, and phone calls (if registered).
The Ajax security system is capable of operating independently, but users can still link the system to the main monitoring centers of security companies.
👉 Buy DoorProtect - Sensor-activated door opener
Features of component details
-
DoorProtect device
-
Large magnet
-
Small magnets
-
Traffic lights
-
SmartBracket mounting plate (The dotted line section is for vandalism protection against tampering when the device is removed or pulled from the mounting surface. Do not break it!)
-
Ports for connecting external touch devices.
-
QR Code
-
Power switch
-
Vandal-proof switch
How DoorProtect works
DoorProtect consists of two components: a sensor with a sealed reed relay and a magnet. The sensor is attached to the door frame, and the magnet is attached to the moving side (pull open or slide). If the sealed reed relay is within the magnetic field, the circuit is closed – the sensor closes. Opening the door changes the distance between the magnet and the sensor, causing the circuit to open, and the device registers that the door has opened.
A small magnet can cover a magnetic field of 1cm, while a larger magnet can cover 2cm.
Once activated, DoorProtect will enter intrusion detection mode and immediately transmit an alarm signal to the Ajax Hub, activating the alarm siren connected to the hub and notifying users as well as security companies.
Connect the device to the Ajax security system.
Connect the sensor to the Hub.
Before starting the connection:
-
Install the Ajax app on your phone and follow the instructions to set up the Hub (Hub, Hub Plus).
-
Create a user account, add the Hub to the app, and create at least one room.
-
Open the Ajax application.
-
Turn on the hub and check your internet connection.
-
Check and make sure that the Hub is in the Disabled mode and not updating (check the status displayed in the application).
⚠️ Only users with administrator privileges can add new devices to the Hub.
How to connect a device to the Hub:
-
Select “Add device” in the Ajax app.
-
Name the motion sensor device, scan the QR code or manually enter the device's code into the app (the code is located under the lid and on the box), and select the Room for the device.

-
Select “Add” - the countdown will begin.
-
Turn the device's power button to "On".

For the device to operate effectively and without interference, the sensor must be placed within the wireless coverage area of the Hub (with a protective object).
A request to connect to the Hub will be sent shortly after the device is powered on. If you are unable to connect to the Hub, try turning the device off and on again after 5 seconds.
Once connected, the sensor device will appear in the list of connected devices. The frequency of signal scanning will depend on the settings on the Hub, with a default of 36 seconds.
Connect the sensor device to third-party security systems.
To connect the sensor to third-party central processing units, you can use the integrated Ajax uartBridge or Ajax ocBridge Plus module, following the instructions in the product manual.
Parameters
Devices → DoorProtect
|
Category |
Content |
|
Temperature |
The temperature of the sensor device is measured on the microprocessor and updated continuously. |
|
Signal strength |
Signal strength of the connection between the Hub and the sensor device. |
|
Battery level |
The remaining battery level of the device is displayed in 25% increments. |
|
Lid |
The device's anti-tampering mechanism reacts when the device is removed from its installation location or the housing is damaged. |
|
Entry delay, seconds |
Entry delay |
|
Delay when exiting, seconds |
Delay when exiting |
|
Connect |
Connection status between the hub and the device |
|
Main touch status |
Status of the main sensor |
|
Adverse reaction |
The status of the sensor device is linked to DoorProtect. |
|
Always on |
If activated, the sensor will always be in activated mode. |
|
Software |
The device's software version |
|
Device ID |
Unique device identification |
Set up the touch device.
Devices → DoorProtect → ⚙️
|
Function |
Content |
|
first line |
The device name can be customized. |
|
Room |
Select the room where you want to add the device. |
|
Main sensor |
If activated, the device will alert you to door opening and closing activities via the main sensor. |
|
External links are available. |
If activated, the device will record alerts from linked devices. |
|
Always active |
If operational, the detector always records the opening/closing. |
|
Entry delay, seconds |
Choose the entry delay |
|
Delay when exiting, seconds |
Choose the exit delay |
|
Lag in night mode |
Enable delay when setting night mode. |
|
Activated in night mode |
If selected, the device will switch to activation mode when you enter night mode. |
|
The alarm sounds when the door is opened. |
If activated, the HomeSiren and StreetSiren sirens will be triggered upon the opening of a door. |
|
Activate an alarm when an external connection is enabled. |
If enabled, the HomeSiren and StreetSiren sirens will activate upon the switching on of the connected device. |
|
Check the wave intensity. |
Switch the device to signal strength testing mode. |
|
Check the detection area. |
Switch the device to detection area testing mode. |
|
Check for decline |
Switch the device to attenuation test mode (only available on devices with software version 3.5 or higher). |
|
User manual |
Open the device's user manual. |
|
Unconnect the device. |
Disconnect the device from the hub and delete all settings. |
Sensor device alerts
Event |
Signal |
Note |
|
Turn on the touch screen. |
Turn on the green light for about 1 second. |
|
|
The device is connected to Hub, ocBridge, and uartBridge. |
Flashes continuously for a few seconds. |
|
|
Anti-sabotage/anti-vandalism measures are activated. |
The light turns green for about 1 second. |
An alarm is sent every 5 seconds. |
|
The battery needs replacing. |
During an alarm, the device flashes a green light slowly. |
Instructions on how to replace the battery are clearly stated in the "Battery Replacement Guide" section. |
Check the touch screen.
The Ajax security system allows for testing to assess the functionality of connected devices.
The testing modes will not start immediately but after a 36-second cycle when using the default settings. The start time of the test depends on the scanning cycle settings of the sensor device (see the “Jeweller” settings in the Hub settings).
-
Check signal strength
-
Check the scan range.
-
Check for decline
Equipment installation
Choose the installation location.
The optimal installation location for DoorProtect depends on the distance between the device and the central hub, as well as the number of obstacles in between that can degrade signal quality: walls, floors, large objects in the room, etc.
⚠️ Check the signal strength in the settings.
If the signal strength is only one bar, Ajax won't guarantee that the system will work perfectly. Do everything you can to improve the signal quality! At the very least, try moving the device; even just 20 cm can significantly improve the connection quality.
If, after moving, the device still has a weak or unstable signal, use a ReX signal booster.
The device is placed inside or outside the door (or window) frame.
When installing the detector in perpendicular planes (inside the housing/frame), use the small magnets from the kit. The distance between the magnets and the detector should not exceed 1 cm.
When installing the devices on the same surface, use a large magnet, ensuring the distance between the magnet and the device does not exceed 2 cm.
The magnet is attached to the movable side of the door (window) on the right side of the sensor, with an arrow indicating the direction. If necessary, the sensor can be hung upside down or horizontally.

Sensor installation guide
Before installation, make sure you have chosen a location that meets the requirements of this instruction manual.

-
Attach the smart wall panel to the surface using screws, employing at least two fixing points (one of which should be above the vandal-proof section). After selecting other mounting hardware, ensure that it does not damage or deform the wall panel.
Double-sided tape should only be used as a temporary fixation solution for equipment. The tape will dry out over time and could cause the equipment to fall, leading to malfunction or potentially damaging the equipment due to the fall.
-
Place the device on the mounting bracket. As soon as the device is secured on the SmartBracket, its LED will flash – this signals that the device's tamper-proof cover has been closed.
If the device's LED indicator light does not illuminate after installation on the SmartBracket, check the vandal-proof mode status in the Ajax Security System app and adjust the tightness of the mounting bracket.
If the device is pulled away from the mounting surface or detached from the mounting bracket, you will receive a notification.
-
Attach the magnets to the hanging board.
Do not install the device at:
-
Outdoor area
-
Keep away from metal objects or glass surfaces as this may affect the quality of the connection signal.
-
In areas where the temperature and humidity range of the device is exceeded.
Connect to a wired sensor device.
A wired sensor with an NC connector can be linked to the DoorProthong device via the external port slot.

Ajax recommends that you install wired devices at a distance of no more than 1 meter – the greater the distance between the wires, the higher the risk of damage and reduced signal quality between devices.
To pull the cord out of the device, bend open the socket:

If an external sensor is linked, you will receive a notification.
Equipment maintenance and battery replacement.
You should regularly check the functionality of the Ajax security system.
Clean the machine body of dust, cobwebs, or other dirt. Use only a soft, dry cloth for maintenance.
Do not use cleaning agents containing carbon monoxide, acetone, or gasoline to clean the equipment.
The built-in battery ensures automatic operation for up to 7 years (with the central hub querying every 3 minutes).
If the door is opened 10 times a day and the detector's interval is set to 60 seconds, DoorProtect will operate for 7 years from the time the battery is installed. You will reduce the device's lifespan to 2 years by setting the interval to 12 seconds.
If a low battery is detected, the security system will send corresponding notifications, and the LED will light up and turn off if the detector detects any movement or if the tamperer is activated.
👉🏻 Instructions for replacing the battery
Technical specifications table
|
Sensor |
Reed relay |
|
Sensing range |
1 cm (small magnet) 2 cm (large magnet) |
|
Vandal-proof switch |
Have |
|
The pins connect to an external sensor device. |
Yes, NC port |
|
frequency band |
868.0 – 868.6 MHz or 868.7 – 869.2 MHz depending on the product sales region. |
|
Maximum power |
20 mW |
|
Module type |
GFSK |
|
Connection range |
Up to 1,200 m (Unobstructed view) |
|
Source |
1 CR123A battery, 3V |
|
Battery life |
Up to 7 years |
|
Operating temperature range |
For Ukraine and East African countries: From -10°C to +40°C Other places: From +5°C to +40°C |
|
Moisture tolerance |
Up to 75% |
|
Size |
Ø 20 x 90 mm |
|
Mass |
29 g |
The complete set includes
-
DoorProtect
-
CR123A battery (pre-installed)
-
Large magnet
-
Small magnets
-
External terminal clamp
-
Installation screw set
-
User manual
Guarantee
The product comes with a 2-year manufacturer's warranty.
If the device is not working as designed, please contact our technical support department before sending it in for warranty service – as over 50% of cases are simply issues with settings.
