Sandel
Avionics
SN3308 Navigation Display
Installation Manual
90106-IM-G(4) Installation Manual W SIG.doc
Appendix-A Page 17
16: RELAY SENSE
NAV-2
OFF
GPS-1
OFF
GPS-2
OFF
CDI SRC SEL
OFF
RCVR
1/2
OFF
Purpose
:
Enables/disables relay sense from any relays which are driven
from SN3308 relay control outputs. When a ground closure is
not detected on the appropriate relay sense terminal (indicating
that the relay did not close) the pilot’s NAV source selection will
be redlined on the pilot’s display. For example if a NAV2 relay
is used and doesn’t close, the pilot’s display will show ”NAV2”.
NAV-2 GPS-1 GPS-2:
Associated with the relay outputs on connector P3.
CDI SRC SEL:
This sense input enables/disables the automatic CDI
function for Garmin GNS receivers when
grounded/ungrounded. This is only used in a dual
SN3308 installation which has Pilot/Copilot select for the
autopilot. See installation drawings. In a typical pilot-
only installation this sense pin is not assigned (OFF) and
the SN3308 will control / be-controlled from the GNS CDI
Select function.
RCVR 1 / 2:
This is the sense input for a relay which is wired to both
the Nav-2 and Gps-2 relay outputs. This is specific to
installations with dual Garmin GNS receivers where both
receivers (all four nav sources) are made available as
nav sources. See installation drawings.
Instructions
: Use
n
and
p
move the cursor, and use the HDG knob to adjust
the value.
Notes
:
Each selection allows assigning the appropriate relay sense
function to one of the following 12 input pins. These pins
represent the probable pins left-over (unassigned) after all the
installed equipment has been wired/assigned to the required
