Installation Manual Part 2

TR-8000 Operator and Installation Manual 57
8.3.1.7 Alarm Connection
Below picture shows where to connect external alarm to TR-8000
In this configuration,
both the external relay and
the alarm unit are powered
from external power source,
and the alarm unit is
grounded through the
external relay if an alarm
occurs or the main power to
the AIS is removed or
defective.
Other configurations
may be used, but remember
that the Alarm must function
both on AIS Alarm
conditions, and power failure
to the AIS.
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 active in case of power off and is capable of
driving a 2A current. The maximum voltage over the alarm relay must not exceed 48V. 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.
#
In/Out
Type
Usage
Name
37
Out
Relay (NO)
Alarm
ALARM_A
38
Out
ALARM_B
Figure 8-16 Typical Alarm connection