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vhfBridge for 3rd Party VHF Transmitters
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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.
- Allows Ajax to work in areas with an unstable Internet connection
- Up to 8 potential outputs
- 15 different events supported by vhfBridge
- Supports a backup battery (see here)
| Technical Specifications | |
| Classification | Transponder for communication with the monitoring station via a VHF transmitter |
| Installation method | Indoors |
| Compatible with Ajax central units | Operates with Hub Plus, Hub 2, Hub 2 Plus |
| Compatible with Ajax range extenders | Operates with Rex, ReX 2 |
| 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 |
| 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 x 64 x 94 mm |
| Recommended battery type | 12 V battery with a capacity of 4 Ah or 7 Ah (not included) |
| 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 | -10°С to +40°С |
| Operating humidity | Up to 75% |
| Dimensions | 196mm х 238mm x 100mm |
| Weight | 840g |
