AJAX VHF MultiTransmitter Wireless Integration

• 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
• 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
• 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

Compatible with Ajax central units : Hub 2, Hub Plus, Hub 2 Plus

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Tech specs

• Classification : Transponder for communication with the monitoring station via a VHF transmitter
• Installation : Indoors
• Number of potential outputs : 8
• Output types : Positive trip and negative trip (depends on the settings)
• Transmission types : Pulse and bistable (depends on the settings)
• Recommended VHF transmitters : Hawk VHF Alarm Transmitter from FSK Electronics / TX750C from RDC / TR-41 from Puper
• Compatible with Ajax range extenders : +
• Compatibility with third-party VHF radio transmitters : vhfBridge connects to any VHF transmitter with relay inputs
• Support for photo verification of alarms : No
• 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
• Supported battery type : 12 V battery with a full charge cycle of up to 30 hours. / The maximum battery size installed in the casing should be 150 × 64 × 94 mm
• Recommended battery type : 12 V battery with a capacity of 4 Ah or 7 Ah / Backup battery is not included in the set
• VHF transmitter power : 12 V DC, 2 A
• Anti-sabotage : Protecting against forgery / Jamming notifications / Tampers against opening and removal / Backup battery
• Jeweller radio protocol : Communication range — up to 1,800 meters in a line of sight / Two-sided communication between devices / Operating frequencies: 868.0–868.6 MHz / Auto-regulated radio signal power: ≤ 25 mW / Blocking encryption based on the AES algorithm / Detector ping interval: 12–300 seconds / Frequency hopping
• Maximum radio signal power : ≤ 25 mW
• Protection class : IP50
• Operating temperature range : From –10°C to +40°C
• Operating humidity : Up to 75%
• Overall dimensions : 196 × 238 × 100 mm (with casing) / 145 × 89 × 51 mm (without casing)
• Weight : 840 g (with casing) / 165 g (without casing)

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