NorthStar 1200-02-01, Installation Manual

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Section Two—Installation Instructions
M3 GPS INSTALLATION MANUAL Revision D PAGE 19
Wiring the M3
Many of the external connections described below are optional for VFR
installations, depending on the customer's desired configuration. If they
won’t be installed, leave the connector pins unconnected.
Power wiring As shown in Figure 9, use P15, pins 13 and 14, to connect through a circuit
breaker to 12 or 24 VDC. Connect P15, pins 23 and 24 to ground.
Annunciator wiring
Wire the remote panel-mounted annunciators as shown in Figure 9. Each
annunciator output functions as a grounding switch, limited to a maximum
of 30 VDC and 200 mA.
Each annunciator driver circuit is designed to power a single bulb at the
rated current capacity. If two or more bulbs are connected to one output,
the initial inrush current may activate over-current protection circuitry pre-
venting bulb illumination. Install a 10-Ohm 1-Watt resistor in series to
lower the inrush currect. Contact the factory for additional information.
The
MESSAGE
,
WAYPOINT ALERT
, and
PARALLEL OFFSET
annunciators
are required for en route IFR approval. The
APPROACH
annunciator is
required for non-precision approach approval. It is recommended that the
installer also wire the
SPARE
annunciator, bringing the leads to a conve-
nient place behind the panel, and cap and stow them; these may be used in
the future.
The
RAIM
annunciator is optional. In the event of a loss of RAIM capabil-
ity or a RAIM-detected satellite failure, the
RAIM
annunciator will light
and the
MESSAGE
annunciator will flash. Pressing
MESSAGE
on the M3
panel will display the appropriate RAIM-related message. The
RAIM
annunciator simply serves as an indication of what message the
Table 3: M3 Annunciators
Function Conn./Pin Abbreviation Color
Message P15 / 20 MSG amber
Waypoint alert P15 / 12 WPT or WP ALRT amber
Parallel offset P15 / 21 OFFSET or PTK amber, white, or green
RAIM P16 / 29 RAIM amber
Approach P16 / 11, 30 APCH
or
APR blue or green
(Spare) P16 / 32