Simrad HS80/MX575C User manual

ENGLISH
HS80/MX575C
User Manual

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Preface | HS80 / MX575C User Manual
Preface
Disclaimer
As Navico is continuously improving this product, we retain the right to make changes to the
product at any time which may not be reflected in this version of the manual. Please contact
your nearest distributor if you require any further assistance.
It is the owner’s sole responsibility to install and use the equipment in a manner that will
not cause accidents, personal injury or property damage. The user of this product is solely
responsible for observing safe boating practices.
NAVICO HOLDING AS AND ITS SUBSIDIARIES, BRANCHES AND AFFILIATES DISCLAIM ALL
LIABILITY FOR ANY USE OF THIS PRODUCT IN A WAY THAT MAY CAUSE ACCIDENTS, DAMAGE
OR THAT MAY VIOLATE THE LAW.
Governing Language: This statement, any instruction manuals, user guides and other
information relating to the product (Documentation) may be translated to, or has been
translated from, another language (Translation). In the event of any conflict between any
Translation of the Documentation, the English language version of the Documentation will be
the official version of the Documentation.
This manual represents the product as at the time of printing. Navico Holding AS and its
subsidiaries, branches and affiliates reserve the right to make changes to specifications
without notice.
Compliance
The HS80 / MX575C systems complies with the following regulations:
• Marine Equipment Directive (MED) 2010/68/EU, and the last modification by Directive
2 011/ 75/ EU:
- HS80: Annex A.1 - 4.41 Transmitting heading device THD
- MX575: Annex A.1 - 4.41 Transmitting heading device THD
Annex A.1 - 4.14 GPS equipment
Annex A.1 - 4.50 DGPS equipment
See also “Certifications”on page 35,
For more information please refer to our website: pro.simrad-yachting.com.
The Wheelmark
The HS80 / MX575C systems are produced and tested in accordance with the European
Marine Equipment Directive 2010/68/EU. This means that the systems comply with the
highest level of tests for nonmilitary marine electronic navigation equipment existing today.
The Marine Equipment Directive 2010/68/EU (MED) for ships flying EU or EFTA flags applies to
all new ships, to existing ships not previously carrying such equipment, and to ships having
their equipment replaced.
This means that all system components covered by annex A1 must be type-approved
accordingly and must carry the Wheelmark, which is a symbol of conformity with the Marine
Equipment Directive.
Copyright
Copyright © 2012 Navico Holding AS.
Warranty
The warranty card is supplied as a separate document.
In case of any queries, refer to the our website: pro.simrad-yachting.com.

2 | Preface | HS80 / MX575C User Manual
About this manual
This manual is a reference guide for installing and using the HS80 / MX575C systems.
The latest available manual version can be downloaded from our web sites.
Important text that requires special attention from the reader is emphasized as follows:
¼Note: Used to draw the reader’s attention to a comment or some important information.
Warning: Used when it is necessary to warn personnel that they
should proceed carefully to prevent risk of injury and/or damage to
equipment/personnel.

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Preface | HS80 / MX575C User Manual
Contents
4 Introduction
4 Overview
5 Parts list
6 Installation
6 Mounting location
8 Mounting orientation
9 Mounting options
15 Por ts
19 Powering the HS80/MX575C
20 Connecting the HS80/MX575C to external devices
21 Default parameters
22 Operation
22 GPS overview
23 HS80/MX575C overview
27 Common commands and messages
31 Troubleshooting
33 Technical specications
33 Specifications
35 Certifications
36 Output messages
42 Proprietary Input data messages
50 Wiring Diagrams
50 MX420 CDU to MX575C interface diagram
50 MX510/MX512 to MX575C interface diagram
51 HS80/MX575C interface via MX510 junction Box
52 MX512 to MX575C interface diagram via MX512 Junction Box
53 1PPS output of MX575C
53 PC to MX575C interface diagram

4 | Introduction | HS80/MX575C User Manual
Introduction
Overview
The HS80 GPS Compass and the MX575C DGPS Compass are based upon a new generation
GPS engine technology.
Figure 1-1: HS80/MX575C side view
¼Note: When referring to both the HS80 GPS Compass and the MX575C DGPS Compass this
manual uses the term HS80/MX575C. When referring to either product, this manual uses
either HS80 or MX575C, respectively.
The HS/80/MX575C is a complete GPS compass and positioning system in a single enclosure
that requires only one power/data cable connection. With its NMEA 2000/NMEA 0183 support
and ease of installation, the HS80/MX575C is the perfect solution for marine applications.
The HS80/MX575C is an integrated system that houses the following:
- New GPS engine technology
- Dual GPS antennas
- DGPS beacon module and H-field beacon antenna (MX575C only)
- Power supply
- Single axis gyro
- Tilt sensor on each axis (X and Y axes)
The gyro and tilt sensors are present to improve system performance and to provide backup
heading information in the event that a GPS heading is not available due to signal blockage.
¼Note: The HS80 GPS Compass is identical to the MX575C DGPS Compass with the exception
that it does not contain a DGPS beacon receiver and H-field antenna. If you purchased the
HS80 GPS Compass, disregard the sections of this manual that discuss the beacon signal,
receiver operation, and implications to installation relating to the beacon signal.
The new GPS engine technology supports multiple RF front ends - enabling tighter coupling
of measurements from separate antennas for use in heading-based products. Users will
achieve excellent accuracy and stability due to the more accurate code phase measurements,
improved multipath mitigation, and fewer components.
The HS80/MX575C GPS antennas are separated by 50 cm between their phase centers,
resulting in +/- 0.5° RMS heading performance. The HS80/MX575C provides heading and
positioning updates of up to 20 Hz and delivers positioning accuracy of +/- 1.0 m 95% of
the time when using differential GPS corrections from beacon (MX575C only) or from Space
Based Augmentation Systems (SBAS).
The HS80/MX575C also features the GPS’exclusive COAST™ technology that enables the
GPS receivers to utilize old differential GPS correction data for 40 minutes or more without
significantly affecting the positioning quality. The HS80/MX575C is less likely to be affected
by differential signal outages due to signal blockages, weak signals, or interference when
using COAST.
1

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Introduction | HS80/MX575C User Manual
Parts list
¼Note: The HS80/MX575C’s parts comply with IEC 60945 Section 4.4: “exposed to the weather.”
The sections below list parts included in your HS80 kit and the MX575C kit.
HS80 Parts list
Part Name Qty Part number
HS80 GPS Compass 1 000-10938-001
Serial-to-NMEA 2000 adapter 1 000-10941-001
Manual 1 988-10221-001
Kit containing the following:
• Clamp 1
• Screw 1
• Washer 1
Optional items
15 meter Power/data cable 000-10939-001
30 meter antenna cable 000-10940-001
MX575C Parts list
Part Name Qty Part number
MX575C DGPS Compass 1 000-10747-001
Power/data cable, 15 m 1 000-10939-001
Manual 1 988-10221-001
Kit containing the following:
• Clamp 1
• Screw 1
• Washer 1
Optional items
Serial-to-NMEA 2000 adapter 000-10941-001
30 meter antenna cable 000-10940-001

6 | Installation | HS80/MX575C User Manual
Installation
Mounting location
This section provides information on determining the best location for the HS80/MX575C.
GPS reception
When considering where to mount the HS80/MX575C, consider the following GPS reception
recommendations:
• Consider GPS (and hence SBAS) reception, ensuring there is a clear view of the sky available
to the HS80/MX575C so the GPS and SBAS satellites are not masked by obstructions that may
reduce system performance
• Since the HS80/MX575C computes a position based on the internal primary GPS antenna
element, mount the HS80/MX575C where you desire a position with respect to the primary
GPS antenna (located on the end opposite the recessed arrow on the underside of the
enclosure).
• Locate any transmitting antennas away from the GPS Compass by at least a few meters to
ensure tracking performance is not compromised, giving you the best performance possible
• Make sure there is enough cable length to route into the vessel to reach a breakout box or
terminal strip
• Do not locate the antenna where environmental conditions exceed those specified in
“Environmental spec”on page 34.
Beacon reception
When using the MX575C internal beacon receiver as the correction source, consider the
possible mounting locations from the perspective of ambient noise within the beacon band
(300 KHz).
Keep the following in mind when deciding upon a location with respect to maximizing
beacon performance:
• Ensure that the antenna is as far as possible from all other equipment that emits
electromagnetic interference (EMI) such as DC motors, alternators, solenoids, radio
transmitters, power cables, display units, and other electronic devices.
• If you are installing the antenna on a vessel, mount the MX575C considering maintenance
and accessibility. In addition, ensure that the antenna is not obscured by the metal mast, guy
wires or metal railings on the vessel.
• If radar(s) or INMARSAT system is present, mount the GPS Compass antenna outside the path
of the transmission beam.
The MX575C’s internal beacon receiver calculates a signal-to-noise ratio (SNR), measured in
decibels (dB) that indicates the receiver’s performance. The SNR is the height of the signal
above the noise floor: the higher the SNR, the better your beacon receiver demodulates the
signal. The optimum antenna location will be a position where your average SNR is highest.
You should turn on all accessories that you intend to use during normal operation when
locating the best position for the antenna. By monitoring the SNR, you can determine
the optimum location with respect to beacon reception. The SNR is available in the GPS6
(Beacon Status) screen of the MX CDU.
2

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Installation | HS80/MX575C User Manual
Environmental considerations
The HS80/MX575C is designed to withstand harsh environmental conditions; however,
adhere to the following limits when storing and using the GPS Compass:
• Operating temperature: -30°C to +70°C (-22°F to +158°F)
• Storage temperature: -40°C to +85°C (-40°F to +185°F)
• Humidity: 95% non-condensing
VHF interference
VHF interference from such devices as cellular phones and radio transmitters may interfere
with GPS operation. For example, if installing the HS80/MX575C near marine radios consider
the following:
• VHF marine radio working frequencies (Channels 1 to 28 and 84 to 88) range from 156.05 to
157.40 MHz. The GPS working center frequency is 1575.42 MHz. The bandwidth is +/- 2MHz to
+/- 10 MHz, which is dependent on the GPS antenna and receiver design
• VHF marine radios emit strong harmonics. The 10th harmonic of VHF radio, in some channels,
falls into the GPS working frequency band, which may cause the SNR of GPS to degrade
significantly
• The radiated harmonic signal strength of different brands/models varies.
• Follow VHF radio manufacturers’ recommendations on how to mount their radios and what
devices to keep a safe distance away.
• Handheld 5W VHF radios may not provide suitable filtering and may interfere with the HS80/
MX575C’s operation if too close.
Before installing the HS80/MX575C use the following diagram to ensure there are no nearby
devices that may cause VHF interference.
Use these minimum distances
to determine where to place
the HS80/MX575C
1.5 m radius at top
(minimum)
1.0 m radius at base (minimum)
VHF antenna
Figure 2-1: HS80/MX575C minimum distance from nearby VHF radios

8 | Installation | HS80/MX575C User Manual
Mounting orientation
The HS/80/MX575C outputs heading, pitch, and roll readings regardless of the orientation
of the antennas. However, the relation of the antennas to the boat’s axis determines
whether you will need to enter a heading, pitch, or roll bias. The primary antenna is used
for positioning and the primary and secondary antennas, working in conjunction, output
heading, pitch, and roll values.
¼Note: Regardless of which mounting orientation you use, the HS80/MX575C provides the
ability to output the heave of the vessel. This output is available via the $GPHEV message.
Parallel orientation
The most common installation is to orient the HS80/MX575C parallel to, and along the
centerline of, the axis of the boat. This provides a true heading. In this orientation:
• If you use a gyrocompass, you can enter a heading bias in the HS80/MX575C to calibrate the
physical heading to the true heading of the vessel.
• You may need to adjust the pitch/roll output to calibrate the measurement if the Vector is not
installed in a horizontal plane.
Perpendicular orientation
You can also install the antennas so they are oriented perpendicular to the centerline of the
boat’s axis. In this orientation:
• You will need to enter a heading bias of +90° if the primary antenna is on the starboard side
of the boat and -90° if the primary antenna is on the port side of the boat.
• You will need to configure the receiver to specify the GPS antennas are measuring the roll axis
using $JATT,ROLL,YES.
• You will need to enter a roll bias to properly output the pitch and roll values.
• You may need to adjust the pitch/roll output to calibrate the measurement if the Vector is not
installed in a horizontal plane.
Figure 2-2 and Figure 2-3 provide mounting orientation examples.
Recessed arrow located on
the bottom of the enclosure
Forward motion
Figure 2-2: Recommended orientation and resulting signs of HPR values

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Installation | HS80/MX575C User Manual
Recessed arrow located on
the bottom of the enclosure
Forward motion
Figure 2-3: Alternate orientation and resulting signs of HPR values
HS80/MX575C alignment
The top of the HS80/MX575C enclosure incorporates sight design features to help you align
the enclosure with respect to an important feature on your vessel.
To use the sights, center the small post on the opposite side of the enclosure from you,
within the channel made in the medallion located in the center of the enclosure top as
shown in Figure 2-4 and Figure 2-5. Alignment accuracy when looking through the long
site (Figure 2-4) is approximately +/- 1°, while alignment through the short site (Figure 2-5) is
approximately +/- 2.5°.
Figure 2-4: Long sight alignment Figure 2-5: Short sight alignment
If you have another accurate source of heading data on your vessel, such as a gyrocompass,
you may use its data to correct for a bias in HS80/MX575C alignment within the HS80/
MX575C software configuration. Alternatively, you can physically adjust the heading of
the HS80/MX575C so that it renders the correct heading measurement; however, adding a
software offset is an easier process.
Mounting options
The HS80/MX575C allows for two different mounting options: flush mount and pole mount.
• Flush mount - The bottom of the HS80/MX575C contains eight M8-1.25 holes for flush
mounting the unit to a flat surface (see Figure 2-6). The eight holes comprise two sets of four
holes. The inner four holes are in the same location as the HS70, allowing you to use the HS80/
MX575C as a drop-in replacement. The outer four holes provide a wider mounting option.
• Pole mount - The bottom of the HS80/MX575C contains a mounting hole (1”thread, 0.9”
depth) for easy pole mounting. Hand tighten until snug (do not over tighten). The set screws
on the long sides of the base (see middle drawing in Figure 2-6) allow you to secure the HS80/
MX575C in place (3/16” Allen wrench not included).

10 | Installation | HS80/MX575C User Manual
HS80/MX575C dimensions
Figure 2-6 illustrates the physical dimensions of the HS80/MX575C.
Figure 2-6: HS80/MX575C dimensions

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Installation | HS80/MX575C User Manual
Power/Data cable considerations
Before mounting the HS80/MX575C consider the following regarding power/data cable
routing:
• Cable must reach an appropriate power source
• Cable may connect to a data storage device, computer, or other device that accepts GPS data
• Avoid running the cable in areas of excessive heat
• Keep cable away from corrosive chemicals
• Do not run the cable through door or window jams
• Keep cable away from rotating machinery
• Do not crimp or excessively bend the cable
• Avoid placing tension on the cable
• Remove unwanted slack from the cable at the HS80/MX575C end
• Secure along the cable route using plastic wraps
Warning: Improperly installed cable near machinery can be
dangerous.
Mounting the HS80/MX575C
This section describes how to flush mount or pole mount the HS80/MX575C. Keep the
following in mind when planning your installation:
• SIMRAD does not supply mounting surface hardware or a mounting pole. You must supply
the appropriate hardware or mounting pole required to complete HS80/MX575C installation.
• You do not necessarily need to orient the antenna precisely as you can enter a software offset
to accommodate for a heading measurement bias due to installation.
Flush mounting the HS80/MX575C
The bottom of the HS80/MX575C contains eight holes (two sets of four holes) for flush
mounting the unit to a flat surface (Figure 2-7). The flat surface may be something you
fabricate per your installation, an off-the-shelf item (such as a radar mounting plate), or an
existing surface on your vessel.
Figure 2-7: Flush mounting holes on bottom of HS80/MX575C
Complete the following steps to flush mount the HS80/MX575C:
1. Determine the desired location and proper orientation for the HS80/MX575C.
See “Mounting orientation” on page 8 for information on determining the desired
orientation.
2. Use the supplied template or photocopy the section of the HS80/MX575C that contains
the eight mounting holes (see Figure 2-7) for use as a template to plan the mounting hole
locations. Use the inner four holes or the outer four holes per your installation.
If using a photocopy make sure it is scaled one-to-one with the mounting holes on the
bottom of the HS80/MX575C.
3. Mark the mounting hole centers on the mounting surface.

12 | Installation | HS80/MX575C User Manual
4. Place the HS80/MX575C over the marks to ensure the planned hole centers align with the
true hole centers (adjusting as necessary).
5. Use a center punch to mark the hole centers.
6. Drill the mounting holes with a 9 mm bit appropriate for the surface.
7. Place the HS80/MX575C over the mounting holes and insert the mounting screws through
the bottom of the mounting surface into the HS80/MX575C.
Warning: When installing the HS80/MX575C, hand tighten only.
Damage resulting from over tightening is not covered by the warranty.
Pole mounting the HS80/MX575C
If you need the GPS-assisted roll measurement, install the HS80/MX575C perpendicular to the
vessel’s axis. If you do not need this measurement, install the HS80/MX575C parallel with the
vessel’s axis. For more information refer to Figure 2-2 on page 8 and Figure 2-3 on page
9.
Complete the following steps to pole mount the HS80/MX575C:
1. Determine the desired location and proper orientation for the HS80/MX575C. See “Mounting
orientation” on page 8“ for information on determining the desired orientation.
2. Hand tighten the HS80/MX575C on the pole until snug (unit is stable on pole) while ensuring
correct orientation.
Warning: Hand tighten only. Damage resulting from over tightening
is not covered by the warranty.
3. Use the set screws on the long sides of the base (see Figure 2-6 on page 10) to secure the
HS80/MX575C in place (3/16” Allen wrench not included).

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Installation | HS80/MX575C User Manual
Connecting the serial cable or Serial-to-NMEA 2000 adapter to the HS80/
MX575C
After you mount the HS80/MX575C connect either the serial power/data cable or the serial-
to-NMEA 2000 adapter to the HS80/MX575C.
Connecting the serial Power/Data cable
1. Align the cable connector keyway with the HS80/MX575C connector key
Connect cable here
2. Rotate the cable ring clockwise until it locks. The Locking action is firm; you will feel a positive
“click” when it has locked.
Cable ring
Cable connector keyway Connector key
3. Attach the power/data cable to the cable clamp.
4. Fasten the clamp to the bottom of the HS80/MX575C using the screw and washer.
5. Attach the cable cover.

14 | Installation | HS80/MX575C User Manual
Connecting the Serial-to-NMEA 2000 adapter
For more information on the serial-to-NMEA 2000 adapter see “NMEA 2000 port” on page
16. This adapter is an optional item for the MX575C model.
1. Align the adapter connector keyway with the HS80/MX575C connector key.
Connect adapter
here
2. Rotate the cable ring clockwise until it locks. The locking action is firm; you will feel a positive
“click” when it has locked.
Cable ring
Cable connector keyway Connector key
3. Fasten the adapter to the body of the HS80/MX575C using the provided screws and the two
slots in the adapter.
4. Attach the cable cover.

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Installation | HS80/MX575C User Manual
Ports
The HS80/MX575C offers either NMEA 0183 serial port or NMEA 2000 port functionality.
Serial ports
The HS80/MX575C has three ports (Port A, Port B, and Port C), where:
• Port A can be both full-duplex RS-232 and half-duplex RS-422 (transmit only)
• Port B is full-duplex RS-422
• Port C is for NMEA 2000 and only available via serial-to-NMEA 2000 adapter
You can receive external differential corrections via either Port A (full-duplex RS-232) or Port
B (full-duplex RS-422). You can connect up to three devices at one time using two ports. One
device can receive data via Port A (RS-422 transmit only) while two devices can transmit and
receive data via Ports A and B (one connected to Port A RS-
232 and one connected to Port B).
¼Notes:
1. Port A (RS-422) or Port B is required for communicating to an IMO-approved device.
2. You can update firmware via Port A (RS-232) or Port B.
¼Note: The MX575C has maximum baud rate of 38400. Higher baud rates may impair beacon
signal tracking.
Serial port conguration
You may configure Port A or Port B of the GPS receiver to output any combination of data.
Port A can have a different configuration from Port B in terms of data message output, data
rates, and the baud rate of the port. This allows you to configure the ports independently
based upon your needs.
For example, if you want one generalized port and one heading-only port, you can configure
the ports as follows:
• Port A to have GPGGA, GPVTG, GPGSV, GPZDA, and GPHDT all output at 1 Hz over a 9600
baud rate.
• Port B for GPHDT and GPROT message output at their maximum rate of 20
Hz over a 19200 baud rate.
The messages you configure each port to output and the rate of the port will be the same
for both RS-232 and RS-422 interface levels. For example, the RS-232 Port A and RS-422 Port A
output the same data messages at the same baud rate. If the baud rate or messages for the
RS-422 port need to be changed, this needs to be commanded through the RS-232 port.
Both RS-232 and RS-422 output signals may be used simultaneously.
¼Note: For successful communications use the 8-N-1 protocol and set the baud rate of the
HS80/MX575C’s serial ports to match that of the devices to which they are connected. Flow
control is not supported.
Selecting Baud rates and message types
When selecting your baud rate and message types use the following formula to calculate
the bits/sec for each message and then sum the results to determine the baud rate for your
required data throughput.
Message output rate * Message length (bytes) * bits in byte = Bits/second
(1 character = 1 byte, 8 bits = 1 byte, use 10 bits/byte to account for overhead)
See “Common commands and messages”on page 27 for an example of this calculation.

16 | Installation | HS80/MX575C User Manual
Recommendations for connecting to other devices
When interfacing to other devices, ensure the transmit data output from the HS80/MX575C 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 HS80/MX575C 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 HS80/MX575C to another
device unless it is able to send configuration commands to the HS80/MX575C. Since the
HS80/MX575C 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 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 model.
Insert the 18-pin connector of the adapter into the male end of the 18-pin connector on the
HS80 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 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.
¼Note: 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 HS80/MX575C in NMEA 2000 mode.
Received messages based on a request
PG No.
(PGN) Description Level Default Update Rate (msec) Freq (Hz)
059392 ISO Acknowledgement
Used to acknowledge the status
of certain requests addressed to a
specific ECU.
B On Request On Request
059904 ISO Request
Request the transmission of a specific
PGN, addressed or broadcast.
B On Request On Request
060928 ISO Address Claim
Used to identify to other ECUs the
address claimed by an ECU.
B On Request On Request

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Installation | HS80/MX575C User Manual
126996 Product Information
NMEA 2000 database version
supported, manufacturer’s product
code, NMEA 2000 certification level,
Load Equivalency number, and other
product- specific information.
B On Request On Request
126464 Receive/Transmit PGNs group
function
The Transmit / Receive PGN List
Group type of function is defined
by first field. The message will be a
Transmit or Receive PGN List group
function.
B On Request On Request
129538 GNSS Control Status
GNSS common satellite receiver
parameter status.
B On Request On Request
129545 GNSS RAIM Output
Used to provide the output
from a GNSS receiver’s Receiver
Autonomous Integrity Monitoring
(RAIM) process. The Integrity field
value is based on the parameters set
in PGN 129546 GNSS RAIM Settings.
B On Request On Request
129546 GNSS RAIM Settings
Used to report the control
parameters for a GNSS Receiver
Autonomous Integrity Monitoring
(RAIM) process.
B On Request On Request
The next section shows the transmitted PGNs with their default update rate with the HS80/
MX575C in NMEA 2000 mode.
Transmitted messages
PG No.
(PGN) Description Level Default Update Rate (msec) Freq (Hz)
126992 System Time
The purpose of this PGN is twofold:
To provide a regular transmission
of UTC time and date. To provide
synchronism for measurement data.
B 1000 1
127250 Vessel Heading
Heading sensor value with a flag for
True or Magnetic. If the sensor value
is Magnetic, the deviation field can be
used to produce a Magnetic heading,
and the variation field can be used
to correct the Magnetic heading to
produce a True heading.
B 100 10
127251 Rate of Turn
Rate of change of the Heading.
B 100 10
127257 Attitude
Provides a single transmission that
describes the position of a vessel
relative to both horizontal and vertical
planes. This would typically be used
for vessel stabilization, vessel control
and onboard platform stabilization.
B 1000 1

18 | Installation | HS80/MX575C User Manual
PG No.
(PGN) Description Level Default Update Rate (msec) Freq (Hz)
127258 Magnetic Variation
Message for transmitting variation.
The message contains a sequence
number to allow synchronization
of other messages such as Heading
or Course over Ground. The quality
of service and age of service are
provided to enable recipients to
determine an appropriate level of
service if multiple transmissions exist.
1000 1
129025 Position, Rapid Update
Provides latitude and longitude
referenced to WGS84. Being defined
as single frame message, as opposed
to other PGNs that include latitude
and longitude and are defined as
fast or multi- packet, this PGN lends
itself to being transmitted more
frequently without using up excessive
bandwidth on the bus for the benefit
of receiving equipment that may
require rapid position updates.
B 100 10
129026 COG & SOG, Rapid Update
Single frame PGN that provides
Course Over Ground (COG) and Speed
Over Ground (SOG).
B 250 4
129027 Position Delta, High Precision Rapid
Update
The “Position Delta, High Precision
Rapid Update”Parameter Group is
intended for applications where very
high precision and very fast update
rates are needed for position data.
This PGN can provide delta position
changes down to 1 mm with a delta
time period accurate to 5 msec.
B 100 10
129028 Altitude Delta, High Precision Rapid
Update
The “Altitude Delta, High Precision
Rapid Update”Parameter Group is
intended for applications where very
high precision and very fast update
rates are needed for altitude and
course over ground data. This PG can
provide delta altitude changes down
to 1 millimeter, a change in direction
as small as 0.0057°, and with a delta
time period accurate to 5 msec.
B 100 10
129029 GNSS Position Data
Conveys a comprehensive set of
Global Navigation Satellite System
(GNSS) parameters, including position
information.
B 1000 1
129033 Time & Date
Single transmission that provides UTC
time, UTC Date, and Local Offset.
B 1000 1

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Installation | HS80/MX575C User Manual
PG No.
(PGN) Description Level Default Update Rate (msec) Freq (Hz)
129539 GNSS DOPs
Provides a single transmission
containing GNSS status and dilution
of precision components (DOP) that
indicate the contribution of satellite
geometry to the overall positioning
error. There are three DOP parameters
reported: horizontal (HDOP), Vertical
(VDOP), and time (TDOP).
B 1000 1
129540 GNSS Sats in View
GNSS information on current satellites
in view tagged by sequence ID.
Information includes PRN, elevation,
azimuth, SNR, defines the number of
satellites; defines the satellite number
and the information.
B 1000 1
Powering the HS80/MX575C
Power considerations
For best performance use a clean and continuous 12-24 VDC power supply. The HS80/
MX575C power supply circuit features reverse polarity protection but will not operate with
reverse polarity.
See “Power” on page 34 for complete power specifications.
Connecting to a power source
¼Note: This section refers to powering the MX575C unit via the serial cable connection. The
HS80 power is taken from the NMEA 2000 main buss. Follow the standard procedure for
powering up via NMEA 2000.
Before you power up the HS80/MX575C you must terminate the wires of the power cable as
required. There are a variety of power connectors and terminals on the market from which to
choose, depending on your specific requirements.
Warning: Do not apply voltage higher than 36 VDC. This will damage the receiver and void the
warranty.
To interface the HS80/MX575C power cable to the power source:
• Connect the red wire of the cable’s power input to DC positive (+)
• Connect the black wire of the cable’s power input to DC negative (-)
The HS80/MX575C will start when an acceptable voltage is applied to the power leads of the
extension cable.
Electrical isolation
The HS80/MX575C’s power supply circuit is isolated from the communication lines and the
PC-ABS plastic enclosure isolates the electronics mechanically from the vessel (addressing the
issue of vessel hull electrolysis).