On Ajax integrations with third-party systems, services, and devices
The identifier (ID) is the serial number of the device. It is located under the QR code on the body, board, and packaging of the device.
ID at the bottom of the box
ID under the lid
The ID can also be found in the device states in the Ajax app.
menu.vhfBridge has 8 zones. Zone types are configured in the Ajax app.
See the list of zone types in the User Manual.
vhfBridge communicates with the hub using the secure proprietary Jeweller protocol, so connection to third-party security systems is not provided.
vhfBridge also cannot be connected to third-party security systems, because it is not compatible with uartBridge and ocBridge Plus integration modules.
The minimum cable length for connecting a VHF transmitter to vhfBridge is 2 meters, and the maximum cable length is 7 meters.
It is important to keep to the minimum value to avoid signal overlapping. Exceeding the maximum cable length will result in signal attenuation.
In this case, events and alarms are transmitted simultaneously via two channels: via the internet and via vhfBridge.
Transmission via the internet works as the main communication channel due to its greater reliability and information capacity. The transmitted events can contain the zone number of the triggered detector, group, user, and other data.
vhfBridge works as a backup communication channel, duplicating all events transmitted via the internet.
The delivery speed of events and alarms in both cases does not exceed 1 second.
The following vhfBridge outputs work in the bistable mode:
The rest of the outputs work in the pulse mode.
vhfBridge provides two types of outputs: positive trip and negative trip. The type of outputs is set in the Ajax app.
vhfBridge can supply the VHF transmitter with 12 V DC, 2 A power.
If the current consumption of the VHF transmitter is more than 2 A, it can be connected directly to the vhfBridge battery.
In this case, turn off battery charge tracking in the vhfBridge settings, so that system users do not receive notifications about a long battery charge.
vhfBridge provides two types of outputs: positive trip and negative trip. The type of outputs is set in the Ajax app.
vhfBridge can be connected to VHF transmitters with relay inputs. Connection via UART, RS-485, and other interfaces is not supported.
This option is not provided. See the list of events supported by vhfBridge in the User Manual.
vhfBridge can be connected to Hub Plus, Hub 2, Hub Hybrid and Hub 2 Plus on OS Malevich 2.12 and later versions.
Yes, you can. The keyfob is compatible with wired and wireless systems using Ajax ocBridge Plus or Ajax uartBridge.
Add a key fob to the receiver and assign buttons to the corresponding zones. The zones must be added to the 24-hour zones of the control panel.
Only one key fob button can be assigned to a single ocBridge Plus zone. When you select the type of zone “Arming/Disarming”, two buttons of the key fob are assigned to the zone at once (arming and disarming).
Yes, if the third-party system supports the UART data interface and the communication protocol can be configured or programmed. To configure uartBridge, use the uartBridge protocol.
If you have troubles with setting up a third-party security system with uartBridge, please, contact the manufacturer of this device.
uartBridge does not have dry contacts (NC/NO outputs), but there is a two-way data transfer protocol via the UART interface. With it, you can get information about each device (battery, alarm, sensor status) and connect up to 85 devices.
57600 bps (baud)
Tamper is a miniature button on the device board. It reports an alarm in case of opening the device enclosure, removing the device from the mounting panel, or detaching it from the surface.
The tamper status is displayed in Ajax apps, in the Enclosure section in the states of each device. When the body status is Open, a fault symbol appears on the device icon.
By default, ocBridge Plus response period is set to ping detectors every 36 seconds and to signal an alert after 40 undelivered passes. Under these settings, it will take about 24 minutes for the system to recognize a communication failure.
You can adjust these settings by opening the Ajax configuration settings and connecting to ocBridge Plus. Find the Service Events Control tab, then Lost Connection, and change Passes Number. You can change response period in the Radio Zone tab.
The maximum distance between the hub and the device can reach 2,000 meters in an open space.
Walls, ceilings, and other structures that interfere with the radio signal to get through can significantly reduce the range. In this case, maximum distance mainly depends on the structures’ material, thickness, and arrangement.
You can expand the coverage area of Ajax security systems with the help of radio signal range extenders
The detector is set to Always Active. If you don’t need this level of security, you can turn it off in the detector settings.
Always active mode is required for round-the-clock protection of an object, regardless of security system status (armed or disarmed).
By default, the hub is set to a hub–detector ping interval of 36 seconds and 30 undeliverable data packets to consider the device lost. With these settings, the hub will detect the loss of the detector in 18 minutes.
To reduce this time, go to the hub settings 
in the Jeweller section and change the settings. The minimum time for detecting loss of connection with the device is 36 seconds (3 polls of 12 seconds each).
The time before raising the alarm by the communication loss between hub and device is calculated with the following formula:
Detector Ping Interval × Number of missed pings to determine connection failure
Note that with the minimum ping interval, short-term interference can lead to loss of connection with the device. Therefore, set the minimum values only if it is critically important to promptly inform about events in the system.
At the moment, such an opportunity is not provided, since the equipment of other manufacturers uses other frequencies and communication protocols with the control panels.
You can connect any IP camera using RTSP to the Ajax security system. In total, you can connect up to 10 cameras to Hub, up to 25 cameras to Hub 2, Hub Hybrid up to 50 cameras to Hub Plus, and up to 100 cameras to Hub 2 Plus.
Dahua cameras and video recorders can be added by scanning their QR codes (similarly to Ajax devices). And EZVIZ, Hikvision and Safire video surveillance systems can be added to the hub with a few clicks. So you don’t have to waste time on setting up network equipment.
Video recorders allow you to bypass the limit on the number of video surveillance devices that can be connected to the hub. The video recorder is a single device to which you can connect multiple video cameras. The video stream from each camera will be available in the Ajax app.
The loop (zone) number is required to describe all devices connected to the hub when adding a protected facility to the security company monitoring station.
The number is assigned when adding a device to the hub. The first added device has the first loop (zone) number. After removing the device from the system, its number becomes available. This number can be assigned to the next device to be added to the system.
The loop (zone) number is available in the states of each device in the Ajax app:
The firmware version can be found in the device states in the Ajax app.
menu.
Delay When Entering/Leaving is the time the user has to disarm the security system after entering/leaving the protected area.
The function can be configured for all security detectors and sirens of the Ajax security system. Also, the delay can be separately configured for Night mode.
When the Always active mode is enabled, the detector is constantly armed and detects movement, activating an alarm.
To enable the Always Active mode, in the Ajax app:
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