Nmea 0183 Input & Output; Figure 57 - Typical Nmea 0183 Connections - ComNav Commander P2 Installation & Operation Manual

ComNav Commander P2 Installation & Operation
NMEA 0183 Input & Output
The Commander P2 has ability to accept digital information formatted according to the
NMEA 0183 standard. Many marine electronics devices – such as digital compasses, GPS
receivers, chartplotters, and electronic charting systems, to name a few – have outputs
complying with NMEA 0183.
Two such devices can be connected directly to the Commander P2 SPU, by wiring them into
the plug mated to the receptacle labelled J9 – NAV I/O.
The Commander P2 SPU also has an NMEA output, to allow the autopilot's real-time
Heading data to be sent to devices such as radar, a chart plotter or a navigation program on
a PC.
The diagram below shows typical wiring for the J9 connector.
Figure 57 – Typical NMEA 0183 Connections
When the autopilot is turned on, the Status LED labelled NMEA 0183 IN #1 in the SPU's
Diagnostic section will be lit whenever the autopilot is receiving data on the N
that this indicator only shows that data was received. It does not mean that the data received
is valid.
Typically, this LED will flash at a rate of about once per second for regular data from a GPS
or Chartplotter. It will typically flash at a rate of about ten times per second when connected
to a heading source such as the Vector G2 GPS Compass. If the LED does not flash, and
you are sure the sending device is in fact sending data, try reversing the wires connected to
N 1 - IN.
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Similarly, the LED labelled NMEA 0183 IN #2 will be lit whenever the autopilot is receiving
data on the N
sending data, try reversing the two wires connected to N
Refer to Appendix 1 for more information on the NMEA 0183 sentences accepted and sent
by the Commander P2 system.
Document PN 29010074 V3.1
2 input. If the LED does not flash and you are sure the sending device is
AV
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Installation
1 input. Note
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2 - IN.
AV