User's Manual Part 2

28
Alarm relay
The NAV-7 provides a relay connection which can be selected as normally closed
or normally open contacts.
The alarm relay function is configurable from within the setup pages and can be set
(for example) to switch (change state) on receipt of a Search and Rescue
message or for a system fault.
The red LED on the front panel of the NAV-7 mirrors the function of the alarm relay.
Red LED function
LED OFF Alarm relay NC contact closed
LED ON Alarm relay NO contact closed
Recommended cable for connection of alarm relay:
One twisted pair, shielded, PVC sheathed. The required cable dimension is
dependent on the current necessary to activate the alarm indicator.
Built in alarm relay ratings:
Alarm relay absolute maximum ratings
Maximum switching current in
contacts (inductive load)
1.0 Amp
Maximum switching current in
contacts (resistive load)
3.0 Amp
Maximum switching voltage 120 V AC or 24 V DC
NAV-7
External connections
N/C
Com
N/O