Operating Principle - AJAX vhfBridge User Manual

Lights up for a second once
every 10 seconds.
During an alarm, gradually
lights up and goes out once
every 10 seconds.
LED indication of output status
LED indication
High potential output (positive trip).
Low potential output (negative trip).

Operating principle

vhfBridge is designed to connect third-party VHF transmitters to create an
additional channel for transmitting events to the CMS.
The communication channel with the CMS created using vhfBridge can be used
as the only or as a backup channel for communicating with the CMS
(recommended more reliable option). This means that the hub can
simultaneously transmit all events and alarms to the monitoring station of the
security company not only through SIA (DC-09), ADEMCO 685, SurGard (Contact
ID), and other proprietary protocols but also using vhfBridge.
The transponder receives information about alarms and events from the hub via
the Jeweller radio channel. Then, vhfBridge transmits it to a third-party VHF
No external power supply is
connected to vhfBridge.
No external power supply and
discharged external battery of
vhfBridge.
Lights up green.
Goes out.
The colour of the indication
depends on the status of
connection with the hub:
lights up white if there is
connection with the hub;
lights up red if there is no
connection with the hub.
The colour of the indication
depends on the status of
connection with the hub:
lights up white if there is
connection with the hub;
lights up red if there is no
connection with the hub.
Output status in case of alarm