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In stock
Product Code
38188.92.WH1
SKU
38188.92.WH1
Ajax vhfBridge Jeweller (8PD) (without casing)
Wireless module for connecting an Ajax system to third-party VHF transmitters
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vhfBridge Jeweller
Wireless module for connecting an Ajax system to third-party VHF transmitters
Instant alarm transmission without Internet
vhfBridge is a transponder that provides a hub with an additional channel to communicate with a monitoring station. With vhfBridge you can use Ajax systems in cities where Internet connection is unstable, in nature reserves, mountain and desert areas.
Alarms and events of the system are transmitted via VHF radio waves over tens of kilometres. vhfBridge can be used as a primary or a backup communication channel.
You can connect any VHF transmitter with relay inputs to vhfBridge
List of recommended VHF transmitters
- FSK Electronics Hawk VHF Alarm Transmitter
- RDC TX750C
- Puper TR-41
Elaborate autonomy
You can build in a 7 Ah backup battery inside a vhfBridge casing. It will feed a VHF transmitter with up to 2A current consumption. Therefore, the transmitter doesn't need to have a separate battery, which makes maintenance less frequent.
In case of a power outage at a facility, the transponder and the transmitter operate on a backup battery for up to 75 hours while still transmitting events to a central monitoring station.
- Up to 75 hours4 of autonomous operation
- Place for a 7 Ah backup battery
Adjustable signalling
Get only events you need. You can configure each vhfBridge output in the Ajax app: set an event or disable it.
1. Intrusion
2. Panic button
3. Malfunction
4. Tamper
5. Power loss of vhfBridge
6. Power loss of the hub
7. Hub’s battery discharged
8. Loss of connection between vhfBridge and the hub
9. Fire
10. Medical assistance
11. Any alarm
12. Change of security modes
13. vhfBridge battery discharged
14. Confirmed intrusion*
15. Confirmed hold-up device alarm*
Unique wireless technology
Jeweller is Ajax’s proprietary radio protocol for secure two-way communication. It provides block encryption and device authentication during each communication session with an Ajax hub or radio signal range extender. Jeweller prevents sabotage, spoofing, and data theft.
- Up to 1800 m of communication range in an open space
- Data encryption
- Notification of jamming and connection loss
- Automatic power adjustment
Hassle-free installation
Similar to other Ajax devices, vhfBridge connects to a hub in the app by scanning a QR-code. The transponder casing has perforated areas for more organized wiring. Outputs are configurable with Ajax apps for smartphones and computers.
Adding to the system via QR-code > Mounting on a wall > Connecting of a VHF transmitter > Setting up with an app
| Category Type | Integration modules |
|---|---|
| Colour | Black, White |
| IP Rating | IP40 |
| System Type | Intruder |
| Clearance | No |
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Communication
| Jeweller communication technology |
Proprietary wireless communication technology to transmit commands, alarms, and events. Key features: Two-way communication. Advanced sabotage protection. Block encryption featuring a dynamic key. Instant notifications. Remote configuration in the Ajax apps. |
| Frequency bands |
866.0 – 866.5 MHz 868.0 – 868.6 MHz 868.7 – 869.2 MHz 905.0 – 926.5 MHz 915.85 – 926.5 MHz 921.0 – 922.0 MHz Depends on the sales region. |
| Maximum effective radiated power (ERP) |
up to 20 mW Automatic power control to reduce power consumption and noise interference. |
| Radio signal modulation |
GFSK |
| Radio signal range |
up to 1,800 m Between detector and control panel (or range extender) in an open space. |
| Encrypted communication |
Adjusted by PRO or user with admin rights in the Ajax app. |
| Tilt sensor activation threshold | All the data stored and transmitted are protected by block encryption with a dynamic key. |
| Frequency hopping |
Radio communication uses frequency hopping to prevent interception and jamming. |
Power supply
| Main | 100–240 V, 50/60 Hz |
| Backup | 12 V⎓ battery, 4 or 7 Ah A backup battery is not included. The battery should have a full charge cycle of up to 30 hours. |
| Calculated battery life | up to 75 hours |
| VHF transmitter power |
10.5–15.5 V⎓, up to 2 A |
Key features
| Control via smartphone |
Users can set up the module configurations and receive notifications in Ajax apps. |
| Number of potential outputs |
8 |
| Compatibility with third-party VHF radio transmitters |
Any VHF transmitter with relay inputs can be connected to vhfBridge Jeweller |
| Adjustable pulse duration |
from 0.5 to 255 s |
| Operation modes |
pulse bistable |
| Output types |
high potential (positive trip) low potential (negative trip) |
Board
| Dimensions | 145 x 89 x 51 mm |
| Weight | 165 g |
| Operating temperature range | from -10 °C to +40 °C |
| Operating humidity | up to 75% |
Colour
| Available colours | n/a |
Complete Set
| Contains | vhfBridge Jeweller Power cable 12 V battery connection cable Installation kit Quick start guide |
