Installation Manual Part 3

TR-8000 Operator and Installation Manual 81
10.1.3.5 Alarm Relay Output
The Alarm relay is a normally open earth free relay contact, provided as an independent and simple
method for triggering an external alarm. The alarm relay is deactivated upon acknowledgment of an
alarm, either internally on the display unit, or by an externally provided ACK sentence. If the
Transponder power is lost, and the Alarm relay has power, the alarm will be triggered. In this case, the
only way to deactivate the Alarm is to power the Transponder unit or disconnect the power source of
the Alarm relay.
Figure 10-1 Typical Alarm connection