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AJAX VHFBridge Module for Connecting AJAX Systems To Third-Party VHF Transmitters | Black 

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 kilometres1. vhfBridge can be used as a primary or a backup communication channel.

Reliability and versatility by design

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 hours4 while still transmitting events to a central monitoring station.

• Up to 75 hours 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.

Events supported by vhfBridge:

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

vhfBridge communicates with a hub via an encrypted Jeweller radio protocol. It guarantees continuous interaction of all security system devices. The radio protocol uses frames to synchronize device communication sessions, authentication to prevent forgery, and encryption to protect against data theft.

• Connection with a hub at a distance of up to 1,800 meters
• Alarm transmission within 0.15 seconds
• Hub ping interval from 12 seconds

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.

Complete set:

• vhfBridge
• Power cable
• 12 V battery connection cable
• Installation kit
• Casing (depends on a set)
• Quick start guide

Classification	Transponder for communication with the monitoring station via a VHF transmitter
Installation	Indoors
Number of potential outputs	8
Compatible with Ajax central units	Operates with Hub 2, Hub Plus, Hub 2 Plus, Hub Hybrid
Compatible with Ajax range extenders	ReX, ReX 2
Compatibility with third-party VHF radio transmitters	vhfBridge connects to any VHF transmitter with relay inputs
Primary power supply	100–240 V, 50/60 Hz
Backup power supply	12 V DC, up to 75 hours of power for a transponder and a transmitter
Recommended battery type	12 V battery with a capacity of 4 Ah or 7 Ah. Backup battery is not included in the set
Anti-sabotage	Protecting against forgery ; Jamming notifications ; Tampers against opening and removal ; Backup battery

 

Download the product information

Datasheet

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