AJAX vhfBridge User Manual
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AJAX vhfBridge User Manual

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vhfBridge is a module for connecting Ajax security systems to third-party VHF
transmitters. It provides 8 transistor outputs for connection to third-party VHF
transmitters. 
The device is powered from 100–240 V~ mains and can be operated from a 12
V
backup battery. 
⎓
vhfBridge operates as part of the Ajax security system and connects to the hub
via the
Jeweller
range is up to 1,800 meters without obstacles. Supplied in two con gurations:
with a casing and without it.
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Buy vhfBridge
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Functional elements
Customize
Casing elements
vhfBridge User manual
secure radio communication protocol. The hub communication
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Updated August 8, 2023

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Summary of Contents for AJAX vhfBridge

  • Page 1 The device is powered from 100–240 V~ mains and can be operated from a 12 backup battery.  ⎓ vhfBridge operates as part of the Ajax security system and connects to the hub via the Jeweller secure radio communication protocol. The hub communication range is up to 1,800 meters without obstacles.
  • Page 2 ⎓ Battery not included with vhfBridge set. 3. QR code with the device ID. It is used to pair the device with the Ajax security system. 4. Perforated part of the casing. Necessary for tamper triggering in case of any attempt to detach the device from the surface.
  • Page 3 3. Tamper button. Signals if vhfBridge casing lid is removed. 4. Power button. 5. LED indicator. 6. QR code with the device ID. It is used to pair the device with the Ajax security system. 7. Terminals for connecting a VHF transmitter.

  • Page 4: Led Indication

    Please note that the LED indicator is not visible when the casing lid is closed. The LED indicator is used at the stage of vhfBridge connecting and con guring. Later on, the state of the device can be monitored in the Ajax app.

  • Page 5: Operating Principle

    We use cookies to enhance your browsing experience, serve personalized ads or content, and analyze our tra c. By The communication channel with the CMS created using vhfBridge can be used clicking "Accept All", you consent to our use of cookies. Cookie Policy...
  • Page 6 CMS via a radio channel. 00:00 00:12 Events can be transmitted to the CMS via the Internet and vhfBridge in parallel. Transmission via the Internet works as the main channel because of greater reliability and informativity. The transmitted events may contain the zone number of the triggered detector, group number, user number, and other data. ...
  • Page 7 6. The radio receiver receives the alarm and transmits it to the CMS software. 7. The CMS receives and processes the alarm. Output types vhfBridge has 8 potential outputs for connection to a VHF transmitter. There are two types of outputs:  1. High potential output (positive trip). ...

  • Page 8: Adding To The System

    Adding to the system vhfBridge doesn’t work with Hub, ocBridge Plus, uartBridge and third-party security central units. The device can only be added and con gured through the Ajax PRO app by a user with administrator rights. Before adding a device 1.

  • Page 9: Malfunction Counter

    To connect vhfBridge 1. Open the Ajax app. If your account has access to multiple hubs, select the one to which you want to add vhfBridge. 2. Go to the Devices menu and click Add Device. 3. Name the transponder, scan or enter the QR code manually (located on the device casing and packaging), and select a room and a group (if the group mode is activated).
  • Page 10 We use cookies to enhance your browsing experience, serve personalized ads or content, and analyze our tra c. By clicking "Accept All", you consent to our use of cookies. Cookie Policy Icons display some of the vhfBridge states. You can check them in the Ajax app in the Devices tab.
  • Page 11 Meaning Jeweller Signal Strength. Displays the signal strength between the hub and vhfBridge. Recommended value is 2–3 bars. The charge level of the battery connected to vhfBridge. radio signal range Is displayed when vhfBridge is operating via a extender vhfBridge is disabled.
  • Page 12 We use cookies to enhance your browsing experience, serve personalized ads or content, and analyze our tra c. By clicking "Accept All", you consent to our use of cookies. Cookie Policy O ine — the device is not connected. Please note that the eld is displayed if radio signal vhfBridge is operated via a...
  • Page 13 The device does not follow system commands and does not report alarms or other events. Firmware vhfBridge rmware version.  vhfBridge ID/serial number. Also located on the Device ID device box, its board, and the casing. Device No. Device loop (zone) number.
  • Page 14 Please note that after editing the settings, you should click the Back button to save them. Con guration Meaning vhfBridge name. Displayed in the text of SMS and noti cations in the event feed. To change the device name, click on the pencil Name icon.
  • Page 15 We use cookies to enhance your browsing experience, serve personalized ads or content, and analyze our tra c. By By default, vhfBridge outputs are con gured as follows: clicking "Accept All", you consent to our use of cookies. Cookie Policy...
  • Page 16 5th output — loss of vhfBridge power supply 6th output — power loss of the hub 7th output — hub battery discharged 8th output — loss of communication between the hub and vhfBridge The settings of outputs can be changed in the Ajax app: 1. Go to the Devices tab.
  • Page 17 We use cookies to enhance your browsing experience, serve personalized ads or content, and analyze our tra c. By The panic button connected to the clicking "Accept All", you consent to our use of cookies. Cookie Policy Transmitter MultiTransmitter Ajax keypads The functional button of when it operates in panic button mode...
  • Page 18 Loss of external 110–240 V~ power supply to external Bistable vhfBridge transponder. power failure Transponder Bistable vhfBridge backup battery is discharged. battery low Hub external Loss of external 110–240 V~ power supply to Bistable power failure the hub. We value your privacy...
  • Page 19 The time before sending an event regarding the loss of communication between the hub and vhfBridge to the CMS is calculated with the following formula: We use cookies to enhance your browsing experience, serve personalized ads or content, and analyze our tra c. By “Hub —...
  • Page 20 How to connect a VHF transmitter to vhfBridge When connecting the VHF transmitter, do not twist the wires together, but solder them. The ends of the VHF transmitter wires, which will be inserted into the vhfBridge terminals should be tinned or crimped with a special sleeve.
  • Page 21 6. Fasten the cable securely to the vhfBridge terminals using a straight screwdriver (slot PL 3.0). 7. Connect the power to the VHF transmitter. If a VHF transmitter requires 12 V power to operate, it can be connected to the power terminals of the corresponding vhfBridge zone. Do not connect the external power supply to the transmitter power terminals, as this may damage the device.
  • Page 22 VHF transmitter: the cable length should be su cient for connection. The minimum distance between vhfBridge and the radio transmitter is 2 meters and the maximum distance is 7 meters. The minimum distance is required to avoid signal We value your privacy overlapping.
  • Page 23 1. Remove the vhfBridge casing lid by unscrewing the bottom and top screws with the bundled hex wrench. 2. Remove the vhfBridge board from the holders by pulling them to the sides. We value your privacy We use cookies to enhance your browsing experience, serve personalized ads or content, and analyze our tra c. By clicking "Accept All", you consent to our use of...
  • Page 24 3. Prepare cable openings in advance by carefully breaking out the perforated parts of the casing. 4. Fasten the casing to a vertical surface at the chosen installation location using the bundled screws. When attaching, use all the xation points on the casing.
  • Page 25 6. Install the vhfBridge board into the casing on the racks. Connect VHF transmitter to vhfBridge . Follow the polarity and connection order of the wires. Securely fasten the conductors to the terminals. 8. Secure the cable with cable ties using special mounts inside the casing.

  • Page 26: Maintenance

    Add an integration module to the system 13. Install the lid on the casing and x it with the bundled screws. 14. Test vhfBridge and connected VHF transmitter. Do not install vhfBridge Outdoors. Doing so may cause the device to malfunction or not work properly.

  • Page 27: Technical Speci Cations

    Check the functionality of vhfBridge regularly. The optimal frequency of checks is once every three months. Clean the casing from dust, cobwebs, and other contaminants as they emerge. Use a soft dry cloth suitable for equipment care. Do not use any substances containing alcohol, acetone, gasoline, and other active solvents to clean the device.

  • Page 28: Complete Set

    840 g (with a casing) Weight 165 g (without a casing) Complete set 1. vhfBridge. We value your privacy 2. Power cable. We use cookies to enhance your browsing experience, serve personalized ads or content, and analyze our tra c. By clicking "Accept All", you consent to our use of...

  • Page 29: Warranty

    5. Casing (depends on con guration). 6. Quick start guide. Warranty Warranty for the Limited Liability Company “Ajax Systems Manufacturing” products is valid for 2 years after the purchase. If the device does not work correctly, you should rst contact the support service.
  • Page 30 Email Subscribe We value your privacy We use cookies to enhance your browsing experience, serve personalized ads or content, and analyze our tra c. By clicking "Accept All", you consent to our use of cookies. Cookie Policy...

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