A module for connecting Ajax security systems to third-party VHF transmitters. The vhfBridge is a transponder that provides the hub with another communication channel with the monitoring console. With the vhfBridge module, the Ajax system can be used in cities with unstable internet, mountains, nature reserves or desert areas. The vhfBridge allows the transmission of system alarms and events over VHF radio waves over tens of kilometers. It can be used as a primary or backup communication channel.

Refined autonomy
A backup battery up to 7 Ah is installed in the VhfBridge housing, from which the VHF transmitter can be powered with a consumption of up to 2 A. This allows not to equip the transmitter with a battery and reduces the frequency of its maintenance. In the event of a power outage at the site, the transponder and transmitter operate on a backup battery for up to 75 hours2, continuing to transmit events to the monitoring console.
Up to 75 hours2 operation with on-site power failure
Space for a battery up to 7 Ah

Custom alarm
Get only the measures you need. Each vhfBridge output can be configured in the Ajax application: set the event or disable it.

Uncompromising communication reliability
The vhfBridge communicates with the hub using the encrypted Jeweler radio protocol. It guarantees continuous interaction of all security system devices. The radio protocol uses frames to synchronize device communication sessions, authentication to prevent spoofing, and encryption to protect against data theft.

Assembly without puzzles
Like other Ajax devices, the vhfBridge connects to the hub in the app by scanning a QR code. Perforated sections are provided in the transponder housing for precise wiring. Outputs are configured using Ajax applications for smartphones and computers.

Characteristics:
Color: White and black
Classification: Transponder for communication with a monitoring station using a VHF transmitter
Installation: indoors
Number of possible exits: 8
Output types: high potential and low potential (depending on settings)
Transmission Modes: Pulse and Bistable (depending on zone type) Recommended VHF Transmitters: Hawk VHF Alarm Transmitter from FSK Electronics, TX750C from RDC, TR-41 from Puper
Ajax Hub Compatibility: Works with Hub 2, Hub Plus, Hub 2 Plus
Compatibility with Ajax relays: +
Compatible with third-party VHF transmitters: any VHF transmitter with relay inputs can be connected to the vhfBridge
Alarm photo verification support: No
Main power: 100-240V, 50/60Hz
Backup power: 12 V, up to 75 hours of transponder and transmitter power
Supported battery type: 12 V battery with a full charge cycle of up to 30 hours.
The maximum size of the battery for installation in the case - 150 × 64 × 94 mm
Recommended battery type: 12V 4Ah or 7Ah battery Spare battery not included
Power supply for VHF transmitter: 12V-, 2A
Tamper Protection: Tamper-proof, jam warning, tamper and tear-off, backup battery
Radio Protocol Jeweler
Communication range - up to 1800 m, if there are no obstacles
Two-way communication between devices Operating frequencies - 868.0-868.6 MHz
Self-regulating radio signal power - up to 25 mW
Block encryption based on AES algorithm Sensor polling period - 12-300 s Frequency hopping
Maximum radio signal power: ≤ 25mW
Protection class: IP50
Operating temperature range: From -10°С to +40°С
Working humidity: up to 75%
Dimensions: 196 x 238 x 100 mm
Weight: 840 g
Package contents vhfBridge Power cable 12 V battery connection cable Mounting kit Housing (depending on the kit) Quick instructions
Service life: 10 years