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Installation | HS80/HS80A/MX575C/MX575D UserManual
Recommendations for connecting to other devices
When interfacing to other devices, ensure the transmit data output from the Smart GPS
compass is connected to the data input of the other device. The signal grounds must also be
connected.
Since RS-422 is a balanced signal with positive and negative signals referenced to ground,
ensure you maintain the correct polarity. For example, when connecting the transmit data
output positive signal to the receive line of the other device, it should be connected to the
receive positive terminal. The negative transmit data signal from the Smart GPS compass is
then connected to the receive data negative input of the other device.
There is likely little reason to connect the receive data input of the Smart GPS compass to
another device unless it is able to send configuration commands to the Smart GPS compass.
Since the Smart GPS compass uses proprietary NMEA 0183 commands for control over its
configuration, the vast majority of electronics will not be able to configure its settings unless
the other device has a terminal setting where you can manually issue commands.
NMEA 2000 port
To use the HS80/HS80A for NMEA 2000 interface, you need to use the Serial-to-NMEA 2000
adapter (P/N 710-0113-000#, see Figure 2-8). This adapter is optional item for the MX575C/
MX575D model. Insert the 18-pin connector of the adapter into the male end of the 18-pin
connector on the HS80/HS80A by aligning the keys. You can then attach the adapter to the unit
using the supplied screws (machine, 8-32, ½”, PPHC, SS) and washer (washer, flat, #8, SS). The
5-pin male Micro-C connector connects to your NMEA 2000 drop cable.
Micro-C connector
18-pin Female
connector
Figure 2-8: Serial-to-NMEA 2000 adapter
The MX575C/MX575D DGPS compass model is supplied with 15 meter interface cable for
NMEA 0183 interface connection. An optional 30-meter NMEA 0183 interface cable can be
ordered separately. The NMEA 2000 interface adapter is another option for the MX575C/
MX575D.
¼ Note: The serial-to-NMEA 2000 adapter is not an IMO requirement and may not be used in
such an application.
The next section shows the requested PGNs with the Smart GPS compass in NMEA 2000
mode.
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