Ajax vhfBridge Jeweller VHF Transmitter Interface Module
Product Features
- vhfBridge Jeweller with casing, in black (34899) or white (34898).
- 8 outputs to any VHF transmitter with relay inputs, positive or negative trip.
- Jeweller radio link to the hub, up to 1,800 m in open space.
- Mains powered with a 12 V backup battery, up to 75 hours.
- Powers the VHF transmitter at 10.5-15.5 V DC, up to 2 A.
Ajax vhfBridge Jeweller - VHF Transmitter Interface Module
vhfBridge Jeweller connects an Ajax alarm to a VHF radio transmitter made by another company, for sites where alarm signals are sent to the monitoring station over a VHF radio network. It pairs with the Ajax hub over Jeweller and turns system events into signals on 8 wired outputs, which go to the relay inputs of the VHF transmitter. The outputs can be set as positive or negative trip, pulse or bistable, all from the Ajax apps. This version comes in its own casing with room for a 12 V backup battery, and it can also power the VHF transmitter. Choose black or white above.
Also listed as 34899 (black) and 34898 (white). Ajax model ID VHB.Y.J.
Key features
- 8 outputs to drive any VHF transmitter that has relay inputs.
- Outputs set as high potential (positive trip) or low potential (negative trip).
- Pulse or bistable operation, with pulse length adjustable from 0.5 to 255 s.
- Jeweller radio link to the hub, up to 1,800 m in open space, encrypted and frequency hopping.
- Mains powered (100-240 V AC) with a 12 V backup battery of 4 or 7 Ah, up to 75 hours by Ajax's calculation.
- Supplies 10.5-15.5 V DC, up to 2 A, to the VHF transmitter.
- Supplied in a casing with two tampers. For indoor fitting (IP40).
Technical specification
| Model numbers | 34899 (black), 34898 (white); Ajax model ID VHB.Y.J (with casing) |
|---|---|
| Type | Wireless interface module linking an Ajax system to third-party VHF transmitters |
| Outputs | 8 potential outputs |
| Output types | High potential (positive trip) or low potential (negative trip) |
| Operation modes | Pulse or bistable; pulse length 0.5 to 255 s |
| Compatible transmitters | Any VHF transmitter with relay inputs |
| Set-up | Configuration and notifications in the Ajax apps |
| Radio | Jeweller, 866.0-866.5, 868.0-868.6 and 868.7-869.2 MHz (UK and European bands); up to 25 mW ERP; GFSK |
| Radio range | Up to 1,800 m in open space |
| Protection | Block encryption with a dynamic key, frequency hopping, device authentication; 2 tampers; communication loss detected after 36 s |
| Mains power | 100-240 V AC, 50/60 Hz |
| Backup battery | 12 V, 4 or 7 Ah (battery not included); calculated life up to 75 hours |
| Power to the VHF transmitter | 10.5-15.5 V DC, up to 2 A |
| Operating temperature | -10 °C to +40 °C, humidity up to 75% |
| Protection class | IP40, indoor use only |
| Dimensions | 196 × 238 × 100 mm |
| Weight | 840 g |
| Colours | Black (34899), white (34898) |
| In the box | vhfBridge Jeweller, casing, power cable, 12 V battery connection cable, installation kit, quick start guide |
| Certifications | RED (EN 300 220-1, EN 300 220-2); EMC; LVD; RoHS (EN IEC 63000:2018); PSTI UK Schedule 1 |
Works with
Ajax Jeweller hubs, for example Hub 2 (2G) Jeweller and Hub 2 Plus Jeweller, and third-party VHF radio transmitters with relay inputs.
Common questions
What is it for?
It passes events from an Ajax alarm to a VHF radio transmitter from another maker, for monitoring set-ups that send alarm signals over VHF radio rather than the internet or mobile network.
Which VHF transmitters can I connect?
Ajax says any VHF transmitter with relay inputs can be connected. It has 8 outputs, each set to positive or negative trip.
Can it power the transmitter?
Yes. It supplies 10.5-15.5 V DC, up to 2 A, to the VHF transmitter.
What about power cuts?
The casing takes a 12 V backup battery of 4 or 7 Ah, not included. Ajax calculates up to 75 hours of backup.
Is there a version without the casing?
Yes, Ajax also makes vhfBridge Jeweller (without casing) for fitting inside another enclosure. This listing is the cased version.
Full manufacturer specification: Ajax vhfBridge Jeweller product page
Supplied by Zenith Security Co, Wolverhampton. Orders placed before 2:30pm are normally dispatched for delivery within 1-2 working days to England, Scotland and Wales, or collect from our Wolverhampton trade counter (please call first).
Browse the full Ajax range, more Ajax wireless alarms, other alarm zone expanders and modules, or contact us on 01902 902251 for advice.
| Product Code | VHB.Y.J |
|---|---|
| Manufacturer | AJAX |
| Device Type | Input/Relay Module |
| Product Type | Intruder & Smoke Alarm |
| Technology | Jeweller (wireless) |
| Ajax Range | Baseline |
| Connection Type | Wireless |
| Indoor/Outdoor | Indoor Only |
TECHNICAL SUPPORT
We provide tailored support for you and your CCTV system.
3 YEAR WARRANTY
Many of our Cameras and Recorders come with a comprehensive 3 year warranty.
COME & VISIT US
We've got a fully functioning show room and IP suite to show you exactly how our CCTV equipment works
FREE DELIVERY OVER £ 499
As cheap as £10, orders placed before 2:30pm are dispatched for delivery within 1–2 working days!
