Maretron WSO200 User manual

Revision 1.0 Page i
WSO200
Ultrasonic Wind / Weather Station
User’s Manual
Revision 1.0
Copyright © 2023 Carling Technologies, Inc. All Rights Reserved
Maretron, a Littelfuse Brand
120 Intracoastal Pointe Dr.
Jupiter FL 33477 USA
http://www.maretron.com

WSO200 User’s Manual
Page ii Revision 1.0
Revision History
Revision
Description
1.0
Original document.

Revision 1.0 Page iii
Table of Contents
1Introduction....................................................................................................................... 1
1.1 Firmware Revision.................................................................................................... 1
1.2 WSO200 Features.................................................................................................... 1
2Installation......................................................................................................................... 1
2.1 Unpacking the Box ................................................................................................... 1
2.2 Choosing a Mounting Location................................................................................. 1
2.3 Mounting the WSO200............................................................................................. 2
2.3.1 Mounting the WSO200 to a Standard Marine Pole Mount............................. 2
2.4 Connecting the WSO200.......................................................................................... 4
2.4.1 Checking Connections................................................................................... 5
2.5 Configuring the WSO200.......................................................................................... 5
2.5.1 Device Label.................................................................................................. 5
2.5.2 Installation Offset Calibration......................................................................... 5
2.5.3 Wind Data Damping Period ........................................................................... 5
2.5.4 Barometric Pressure Offset Calibration ......................................................... 5
2.5.5 Outside Humidity Offset Calibration............................................................... 5
2.5.6 Outside Temperature Offset Calibration........................................................ 6
2.5.7 Advanced Configuration…............................................................................. 6
3Operation.......................................................................................................................... 7
3.1 Ultrasonic Wind Speed Sensing............................................................................... 7
4Maintenance ..................................................................................................................... 8
4.1 Replacing the Humidity Sensor ................................................................................ 8
5Troubleshooting.............................................................................................................. 10
6Technical Specifications.................................................................................................. 11
7Technical Support........................................................................................................... 12
8Maretron (2 Year) Limited Warranty................................................................................ 13
Table of Figures
Figure 1 –Mounting the WSO200 to a Standard Marine Pole Mount........................................ 3
Figure 2 –WSO200 Interface Connector................................................................................... 4
Figure 3 –NMEA 2000®Connector Face Views ....................................................................... 4
Figure 4 - Replacing the Humidity Sensor................................................................................. 9
Table of Appendices
Appendix A –NMEA 2000 Interfacing..................................................................................... A1

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Revision 1.0 Page 1
1 Introduction
Congratulations on your purchase of the Maretron WSO200 Ultrasonic Wind / Weather Station.
Maretron has designed and built your WSO200 to the highest standards for years of reliable,
dependable, and accurate service.
The Maretron WSO200 is designed to operate within the harsh demands of the marine
environment. However, no piece of marine electronic equipment can function properly unless
installed and maintained in the correct manner. Please read carefully and follow these
instructions for installation and usage of the Maretron WSO200 in order to ensure optimal
performance.
1.1 Firmware Revision
This manual corresponds to WSO200 firmware revision 1.0.x .
1.2 WSO200 Features
The Maretron WSO200 has the following features.
•NMEA 2000®Interface
•Ultrasonic Wind Sensor
•Field Replaceable Relative Humidity Sensor
•Barometric Pressure Sensor
•Temperature Sensor
•Waterproof Enclosure and Cable System
2 Installation
2.1 Unpacking the Box
When unpacking the box containing the Maretron WSO200, you should find the following items:
1 - WSO200 Ultrasonic Wind/Weather Station
1 - Pole Mount Base
3 - Mounting Screws and Lock Washers
1 - WSO200 User’s Manual
1 - Warranty Registration Card
If any of these items are missing or damaged, please contact Maretron.
2.2 Choosing a Mounting Location
The selection of a suitable mounting location is important for the optimal performance of the
Maretron WSO200. The mounting location and orientation of the WSO200 should be:
1. Level with the earth’s horizontal plane –This gives the WSO200 wind/weather sensor the
best accuracy of wind speed and direction over the widest range of heel angles.

WSO200 User’s Manual
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2. High Enough to have a clear view of the sky to the horizon in all directions unblocked by sails
or boat structures –The WSO200 provides the best readings when wind through it is
unimpeded by sails or structures on the boat.
2.3 Mounting the WSO200
The Maretron WSO200 can be mounted on top of a 1” 14 threads per inch standard marine pole
mount (Section 2.3.1).
2.3.1 Mounting the WSO200 to a Standard Marine Pole Mount
Screw the included WSO200 mounting bracket to the standard marine pole mount. If you do not
have a device capable of configuring installation offset in the WSO200, ensure that the pole
mount is oriented as follows: the pole mount base has three small holes for mounting screws
and one larger hole for the humidity sensor. Ensure that the small (mounting screw) hole which
is nearest the larger (humidity sensor) hole is oriented such that it faces directly forward in the
vessel. If you do have a device capable of configuring installation offset in the WSO200, you
may mount the sensor in any orientation and adjust for it by configuring the installation offset
appropriately (please refer to the display user’s manual for details).
Route the NMEA 2000®cable through the standard marine pole mount and the pole mount base
and connect it to the WSO200 unit (see Section 2.4 below). Finally, attach the WSO200 to the
pole mount base using the included brass mounting screws and lock washers as shown in Figure
1. Do not use threadlocking compounds containing methacrylate ester, such as Loctite Red
(271), as they will cause stress cracking of the plastic enclosure.
WARNING
•When installing the WSO200 to a standard marine pole mount, be
sure to first screw the WSO200 mounting bracket to the pole mount.
Then, attach the WSO200 to the WSO200 mounting bracket with the
three screws which connect these two components. DO NOT first
attach the WSO200 mounting bracket to the WSO200 with the three
screws and then screw the entire assembly onto the pole mount.
Doing this will put excessive torque on the NMEA 2000 connector
from the attached cable and cause damage to the connector which is
not covered under the product warranty.
•Likewise, when uninstalling the WSO200 from a standard marine pole
mount, be sure to first remove the three screws attaching the
WSO200 to the WSO200 mounting bracket. DO NOT first unscrew
the entire assembly from the pole mount before removing the three
screws. Doing this will put excessive torque on the NMEA 2000
connector from the attached cable and cause damage to the
connector, which is not covered under the product warranty.

Revision 1.0 Page 3
Figure 1 –Mounting the WSO200 to a Standard Marine Pole Mount
Humidity
Sensor
NMEA 2000®
Cable
Sensor
Standard
Marine
Pole
Mount
Mounting
Screw
Lock
Washer
Orient
pole
mount
base so
that this
hole will
face
forward

WSO200 User’s Manual
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2.4 Connecting the WSO200
The Maretron WSO200 provides a connection to an NMEA 2000®interface through a connector
that can be found on the bottom of the device (see Figure 2).
Figure 2 –WSO200 Interface Connector
The NMEA 2000®connector is a five-pin male connector (see Figure 3). You connect the
WSO200 to an NMEA 2000®network using a Maretron NMEA 2000®cable (or compatible cable)
by connecting the female end of the cable to the WSO200 (note the key on the male connector
and keyway on the female connector). Be sure the cable is connected securely and that the
collar on the cable connector is tightened firmly. Connect the other end of the cable (male) to
the NMEA 2000®network in the same manner. The WSO200 is designed such that you can plug
or unplug it from an NMEA 2000®network while the power to the network is connected or
disconnected. Please follow recommended practices for installing NMEA 2000®network
products.
Figure 3 –NMEA 2000®Connector Face Views

Revision 1.0 Page 5
2.4.1 Checking Connections
Once the NMEA 2000®connection to the Maretron WSO200 has been completed, check to see
that wind speed information is being properly transmitted by observing an appropriate display.
Refer to Section 5, “Troubleshooting”, if no heading information appears.
2.5 Configuring the WSO200
The WSO200 has several configurable parameters, which are shown in the following sections.
If you are not using the default values, then you will need to refer to the corresponding section
for configuring the WSO200 appropriately.
The WSO200 can be configured in any of the following ways:
•DSM410 Multifunction Display
•DSM570 Multifunction Display
•N2KAnalyzer Network Analysis / Configuration Software. This will
require a Windows PC and one of the following:
oUSB100 NMEA 2000/USB Gateway, or
oIPG100 Internet Protocol Gateway
2.5.1 Device Label
Program this parameter with a text string which identifies this device. Maretron display
products will display this label text when you are selecting data to display.
2.5.2 Installation Offset Calibration
You may compensate the wind direction readings transmitted by the WSO200 in order to
create a 0° apparent wind direction when the wind is blowing directly onto the bow of the boat.
This compensates for installations where the WSO200 is not aligned exactly with the boat’s
centerline.
2.5.3 Wind Data Damping Period
You may adjust the damping that the WSO200 applies to transmitted wind speed and direction
readings. The WSO200 comes from the factory preset with a damping period of 1.5 seconds,
which should be appropriate for most applications. However, you may tune the damping period
to anywhere between 0.1 seconds and 5.0 seconds if you desire.
2.5.4 Barometric Pressure Offset Calibration
If you wish to apply an offset to the barometric pressure reported by the WSO200, you may
change the barometric pressure to match the value you wish displayed, which will create and
apply an offset to future barometric pressure readings.
2.5.5 Outside Humidity Offset Calibration
If you wish to apply an offset to the humidity reported by the WSO200, you may change the
humidity to match the value you wish displayed, which will create and apply an offset to future
humidity readings.

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2.5.6 Outside Temperature Offset Calibration
If you wish to apply an offset to the temperature reported by the WSO200, you may change the
temperature to match the value you wish displayed, which will create and apply an offset to
future temperature readings.
2.5.7 Advanced Configuration…
Certain parameters do not normally need to be set for normal operation but are included in an
advanced configuration section for use in special situations.
2.5.7.1 Device Instance Configuration
This entry allows you to program the NMEA 2000 device instance for the unit. You usually will
not need to modify the default value of “0” unless you have multiple units on the network.
Device instance is always used in the Wind PGNs.
2.5.7.2 Instance –Humidity Configuration
This entry allows you to program the NMEA 2000 device instance for the humidity transmitted
in PGN 130313. You usually will not need to modify the default value of “0” unless you have
multiple humidity sensors on the network.
2.5.7.3 Instance –Pressure Configuration
This entry allows you to program the NMEA 2000 device instance for the air pressure
transmitted in PGN 130314. You usually will not need to modify the default value of “0” unless
you have multiple pressure sensors on the network.
2.5.7.4 Instance –Temperature Configuration
This entry allows you to program the NMEA 2000 device instance for the temperature
transmitted in PGN 130312. You usually will not need to modify the default value of “0” unless
you have multiple temperature sensors on the network. Note that the TMP100 module also
generates these PGNs.
2.5.7.5 Installation Description Configuration
The WSO200, along with all other certified NMEA 2000 devices, has two user-programmable
installation description fields. You may program these fields with information specific to the
device, such as date installed, the initials/name of the installer, the physical location of the
device, etc. This configuration option will allow you to program the values of these fields.
2.5.7.6 NMEA 2000 PGN Enable/Disable Configuration
The WSO200 is capable of transmitting NMEA 2000®messages. You may individually enable
or disable each of these messages. You may also change the rate of transmission of each of
these messages if desired.
2.5.7.7 Restore Factory Defaults
Selecting this configuration option causes all stored parameters in the WSO200 to be reset to
the values they contained when the unit was manufactured.

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3 Operation
As shipped from the factory, the WSO200 automatically provides apparent wind direction,
apparent wind speed, outside air temperature, relative humidity, and barometric pressure and
requires no user configuration. However, some of the WSO200 parameters are user
configurable as described below:
•Installation Offset –As shipped from the factory, the WSO200 will read 0° apparent wind
direction when the wind blows into the sensor directly from the direction of the post
nearest the black humidity sensor that protrudes from the bottom of the sensor. If the
WSO200 is mounted with this post facing directly towards the bow of the boat, no
adjustment is necessary; however, if the sensor is mounted in any other orientation, the
installation offset can be used to compensate the apparent wind direction reading such
that it will read 0° when the apparent wind is blowing directly into the bow of the vessel.
•Wind Speed Damping Period –As shipped from the factory, the WSO200 uses a damping
period of 1.5 seconds to filter short-term variations in wind speed and direction and
provide a more stable, usable output. This damping period can be changed by the user
to increase or decrease the amount of filtering.
•Periodic Rate of Transmission –As shipped from the factory, the WSO200 transmits
PGNs at a periodic rate. Alternatively, a PGN can be disabled by programming its periodic
rate to zero.
Users with direct access to the NMEA 2000®interface may configure these parameters directly
through the NMEA 2000®interface. Please refer to Appendix A for a description of the NMEA
2000®messages used to configure these parameters.
3.1 Ultrasonic Wind Speed Sensing
The wind speed measurement portion of the WSO200 consists of three sets of ultrasonic
transducers spaced equally around a horizontally-aligned circle.
The wind speed is measured by measuring the time of flight of an ultrasonic sound pulse
generated by one set of sensors and received by theother two sets ofsensors. Each of the three
sets of sensors takes a turn at being the transmitter, which the remaining two sensors receive
the pulse. Wind blowing in the direction of flight of a pulse increases the speed of the pulse by
the amount of the wind speed. Measuring the time of flight in both directions between a given
pair of transducers allows the speed of sound to be cancelled out of the calculation, making the
wind speed computation independent of air temperature and relative humidity.
The ultrasonic transducers are robust, yet sensitive instruments. The transducers themselves
must be kept free of any coating, such as paint. The WSO200 unit itself, especially the area
between the transducers, must be kept clean and free of debris for maximum wind speed and
direction accuracy.

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4 Maintenance
Regular maintenance is important to ensure continued proper operation of the Maretron
WSO200. Perform the following tasks periodically:
•Clean the unit with a soft cloth. Do not use chemical cleaners as they may remove paint
or markings or may corrode the WSO200 enclosure or seals. Do not use any cleaners
containing acetone, as they will deteriorate the plastic enclosure. Any spider webs, etc.
that accumulate inside the open portion of the WSO200 may be cleaned out with a water
spray.
•Ensure that the unit is mounted securely and cannot be moved relative to the mounting
surface. If the unit is loose, tighten the mounting screws.
•Check the security of the cable connected to the NMEA 2000®interface and tighten if
necessary.
4.1 Replacing the Humidity Sensor
After extended service in an ocean environment, the humidity sensor may need to be replaced.

Revision 1.0 Page 9
Figure 4 - Replacing the Humidity Sensor
Please follow these steps to replace the humidity sensor:
1. Remove the two screws holding the existing humidity sensor in place.
2. Remove the existing humidity sensor by grasping the tab on the humidity sensor holder
and pulling straight up.
3. Remove the humidity sensor O-ring.
4. Snap the new humidity sensor PCBA into the humidity sensor holder. Please note that
the PCBA and the humidity sensor holder are keyed, so that there is only one way to
snap them together.
5. Place the new humidity sensor O-ring into the humidity sensor recess on the bottom of
the WSO200, centering it on the raised rib.
6. Plug the assembled humidity sensor cover and humidity sensor PCBA into the humidity
sensor recess on the bottom of the WSO200 until it is completely seated. Please ensure
that the pins on the humidity sensor PCBA plug into the connector inside the WSO200.
Also, please note that the humidity sensor cover is keyed so that there is only one way
to plug it in.
7. Place the two screws into the screw holes in the humidity sensor and tighten until snug.
Screws
Humidity Sensor
Cover / Humidity
Sensor PCBA
Assembly
Humidity
Sensor
O-ring
Humidity
Sensor
Recess

WSO200 User’s Manual
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5 Troubleshooting
If you notice unexpected operation of the Maretron WSO200, follow the troubleshooting
procedures in this section to remedy simple problems.
Symptom
Troubleshooting Procedure
No data output
Check the connections to the NMEA
2000®connector and tighten if
necessary
Ensure that power is supplied to the
connected NMEA 2000®cable
Incorrect wind direction or speed
Ensure that the flow of wind into the
WSO200 is not blocked by surrounding
structures.
Ensure that the flow of wind through
the WSO200 is unimpeded and that the
unit is free of debris.
Incorrect humidity reading
Check that a humidity offset value has
not been configured
Replace the humidity sensor
If these steps do not solve your problem, please contact Maretron Technical Support (refer to
Section 7 for contact information).
Warning: There are no user-serviceable components inside the Maretron WSO200. Opening
the WSO200 will expose the sensitive electronic components to adverse environmental
conditions that may render the unit inoperative. Please do not open the WSO200, as this will
automatically void the warranty. If service is required, please return the unit to an authorized
Maretron service location.

Revision 1.0 Page 11
6 Technical Specifications
Specifications
Parameter
Value
Comment
Wind Speed Range
0.5 to 99 knots
(1 to 185 kph)
Wind Speed Resolution
0.1 knot (0.19 kph)
Wind Speed Accuracy
± 10% or 1 knot (1.9
kph)
Tilt 0° (operates to 30° tilt)
Wind Direction Accuracy
± 5°
Tilt 0° (operates to 30° tilt)
Temperature Range
-25° to 55° C
Temperature Resolution
0.18°F (0.1°C)
Temperature Accuracy
±1.8°F (1° C)
Relative Humidity Range
0-99% RH
Relative Humidity Resolution
1% RH
Relative Humidity Accuracy
± 4% RH
Barometric Pressure Range
26 to 32” Hg
(880 to 1080 mb)
Barometric Pressure Resolution
0.03” Hg (1 mb)
Barometric Pressure Accuracy
±0.09” Hg (±3 mb)
Certifications
Parameter
Comment
NMEA 2000
Certified
Maritime Navigation and Radiocommunication Equipment & Systems
IEC 61162-3
Maritime Navigation and Radiocommunication Equipment & Systems
IEC 60945
FCC and CE Mark
Electromagnetic Compatibility
NMEA 2000®Parameter Group Numbers (PGNs) - See Appendix A for Details
Description
PGN #
PGN Name
Default Rate
Periodic Data PGNs
130306
Wind Data
10 Times/Second
130310
Environmental Parameters
2 Times/Second
130311
Environmental Parameters
2 Times/Second
130312
Temperature
2 Times/Second
130313
Humidity
2 Times/Second
130314
Actual Pressure
2 Times/Second
Response to Requested PGNs
126464
PGN List (Transmit and Receive)
N/A
126996
Product Information
N/A
126998
Configuration Information
N/A
Protocol PGNs
059392
ISO Acknowledge
N/A
059904
ISO Request
N/A
060416
ISO Transport Protocol, Connection
Management
N/A
060160
ISO Transport Protocol, Data Transfer
N/A
060928
ISO Address Claim
N/A
065240
ISO Address Command
N/A
126208
NMEA Complex Request/Command/Ack.
N/A
Maretron Proprietary PGNs
126720
Configuration
N/A

WSO200 User’s Manual
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Electrical
Parameter
Value
Comment
Operating Voltage
9 to 32 Volts
DC Voltage
Power Consumption
<50mA
Average Current Drain
Load Equivalence Number (LEN)
1
NMEA 2000®Spec. (1LEN = 50 mA)
Reverse Battery Protection
Yes
Indefinitely
Load Dump Protection
Yes
Energy Rated per SAE J1113
Mechanical
Parameter
Value
Comment
Size
5.91” Diameter x 4.85” Tall
(150mm Dia. x 123.2mm
Tall)
Including Mounting Bracket
Weight
10 oz. (283 g)
Including Mounting Bracket
Mounting
Pole
Fits 1”-14 TPI Standard Marine Mount
Environmental
Parameter
Value
IEC 60945 Classification
Exposed
Degree of Protection
IP67
Operating Temperature
-25°C to 55°C
Storage Temperature
-40°C to 70°C
Relative Humidity
93%RH @40° per IEC60945-8.2
Vibration
2-13.2Hz @ ±1mm, 13.2-100Hz @ 7m/s2per IEC 60945-8.7
Rain and Spray
12.5mm Nozzle @ 100liters/min from 3m for 30min per IEC 60945-8.8
Solar Radiation
Ultraviolet B, A, Visible, and Infrared per IEC 60945-8.10
Corrosion (Salt Mist)
4 times 7days @ 40°C, 95%RH after 2 hour Salt Spray Per IEC 60945-8.12
Electromagnetic Emission
Conducted and Radiated Emission per IEC 60945-9
Electromagnetic Immunity
Conducted, Radiated, Supply, and ESD per IEC 60945-10
Safety Precautions
Dangerous Voltage, Electromagnetic Radio Frequency per IEC 60945-12
7 Technical Support
If you require technical support for Maretron products, you can reach us in one of the following
ways:
Telephone: [phone]
Toll-Free: [phone]
Fax: [phone]
E-mail: [email protected]
World Wide Web: http://www.maretron.com
Mail: Maretron, a Littelfuse Brand
Attn: Technical Support
120 Intracoastal Pointe Dr.
Jupiter, FL 33477

Revision 1.0 Page 13
8 Maretron (2 Year) Limited Warranty
Carling Technologies warrants the Maretron®WSO200 to be free from defects in materials and workmanship for
two (2) years from the date of original purchase. If within the applicable period any such products shall be proved
to Carling’s satisfaction to fail to meet the above limited warranty, such products shall be repaired or replaced at
Carling’s option. Purchaser's exclusive remedy and Carling’s sole obligation hereunder, provided product is
returned pursuant to the return requirements below, shall be limited to the repair or replacement, at Carling’s option,
of any product not meeting the above limited warranty and which is returned to Carling; or if Carling is unable to
deliver a replacement that is free from defects in materials or workmanship, Purchaser’s payment for such product
will be refunded. Carling assumes no liability whatsoever for expenses of removing any defective product or part or
for installing the repaired product or part or a replacement therefore or for any loss or damage to equipment in
connection with which Maretron®products or parts shall be used. With respect to products not manufactured by
Carling, Carling’s warranty obligation shall in all respects conform to and be limited to the warranty actually extended
to Carling by its supplier. The foregoing warranties shall not apply with respect to products subjected to negligence,
misuse, misapplication, accident, damages by circumstances beyond Carling’s control, to improper installation,
operation, maintenance, or storage, or to other than normal use or service.
THE FOREGOING WARRANTIES ARE EXPRESSLY IN LIEU OF AND EXCLUDES ALL OTHER EXPRESS OR
IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND OF FITNESS FOR A PARTICULAR PURPOSE.
Statements made by any person, including representatives of Carling, which are inconsistent or in conflict with the
terms of this Limited Warranty, shall not be binding upon Carling unless reduced to writing and approved by an
officer of Carling.
IN NO CASE WILL CARLING, OR ANY OF ITS PARENT, SUBSIDIARY, OR AFFILIATED COMPANIES BE
LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES, DAMAGES FOR LOSS OF USE, LOSS OF
ANTICIPATED PROFITS OR SAVINGS, OR ANY OTHER LOSS INCURRED BECAUSE OF INTERRUPTION OF
SERVICE. IN NO EVENT SHALL CARLING’S AGGREGATE LIABILITY EXCEED THE PURCHASE PRICE OF
THE PRODUCT(S) INVOLVED. CARLING SHALL NOT BE SUBJECT TO ANY OTHER OBLIGATIONS OR
LIABILITIES, WHETHER ARISING OUT OF BREACH OF CONTRACT OR WARRANTY, TORT (INCLUDING
NEGLIGENCE), OR OTHER THEORIES OF LAW WITH RESPECT TO PRODUCTS SOLD OR SERVICES
RENDERED BY CARLING, OR ANY UNDERTAKINGS, ACTS OR OMISSIONS RELATING THERETO.
Carling does not warrant that the functions contained in any software programs or products will meet purchaser’s
requirements or that the operation of the software programs or products will be uninterrupted or error free.
Purchaser assumes responsibility for the selection of the software programs or products to achieve the intended
results, and for the installation, use, and results obtained from said programs or products. No specifications,samples,
descriptions, or illustrations provided by Carling to Purchaser, whether directly, in trade literature, brochures or other
documentation shall be construed as warranties of any kind, and any failure to conform with such specifications,
samples, descriptions, or illustrations shall not constitute any breach of Carling’s limited warranty.
Warranty Return Procedure:
To apply for warranty claims, contact Carling or a Maretron dealer to describe the problem and determine the
appropriate course of action. If a return is necessary, place the product in its original packaging together with proof
of purchase and send to an Authorized Maretron Service Location. You are responsible for all shipping and
insurance charges. Carling will return the replaced or repaired product with all shipping and handling prepaid except
for requests requiring expedited shipping (i.e. overnight shipments). Failure to follow this warranty return procedure
could result in the product’s warranty becoming null and void.
Carling reserves the right to modify or replace, at its sole discretion, without prior notification, the warranty listed
above. To obtain a copy of the then current warranty policy, please go to the following web page:
http://www.maretron.com/company/warranty.php

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Revision 1.0 Appendix A –NMEA 2000®Interfacing Page A1
Appendix A –NMEA 2000®Interfacing
WSO200 NMEA 2000®Periodic Data Transmitted PGNs
PGN 130306 –Wind Data
The WSO200 uses this PGN to provide a regular transmission of apparent wind speed
and direction data. The factory default for periodic transmission rate is ten times per
second. The transmission of this PGN can be disabled (see PGN 126208 –NMEA Request
Group Function –Transmission Periodic Rate).
Field 1: SID –The sequence identifier field is used to tie related PGNs together. For example,
the WSO200 will transmit identical SIDs for 130306 (Wind Data) and 130311
(Environmental Parameters) to indicate that the readings are linked together (i.e., the
data from each PGN was taken at the same time although they are reported at slightly
different times).
2: Wind Speed –This field is used to indicate the wind speed in units of 10mm/second.
3: Wind Direction –This field is used to indicate the wind direction in units of 0.0001
radians/second.
4: Wind Reference –This field is set to a value of 0x02 to indicate that the wind reading
is an apparent wind speed and direction.
5: Reserved (21 bits) –This field is reserved by NMEA; therefore, this field always
contains a value of 0x1FFFFF (the WSO200 sets all reserved bits to a logic 1)
PGN 130311 –Environmental Parameters
The WSO200 uses this PGN to provide a regular transmission of outside temperature, relative
humidity, and atmospheric pressure. The factory default for periodic transmission rate is twice
per second. The transmission of this PGN can be disabled (see PGN 126208 –NMEA Request
Group Function –Transmission Periodic Rate).
Field 1: SID –The sequence identifier field is used to tie related PGNs together. For example,
the WSO200 will transmit identical SIDs for 130306 (Wind Data) and 130311
(Environmental Parameters) to indicate that the readings are linked together (i.e., the
data from each PGN was taken at the same time although they are reported at slightly
different times).
2: Temperature Instance –The WSO200 sets this field to a value of 0x01 to indicate that
the temperature reading is a reading of outside temperature.
3: Humidity Instance –The WSO200 sets this field to a value of 0x01 to indicate that the
relative humidity reading is a reading of outside humidity.
4: Temperature –This field is used to indicate the outside air temperature in units of
0.01°K.
5: Humidity –This field is used to indicate the relative humidity in units of 0.004%.
6: Atmospheric Pressure –This field is used to indicate the barometric pressure in units
of 100 Pa.
PGN 130312 –Temperature
The WSO200 uses this PGN to provide a regular transmission of outside temperature. The
factory default for periodic transmission rate is disabled. The transmission of this PGN can be
enabled (see PGN 126208 –NMEA Request Group Function –Transmission Periodic Rate).

WSO200 User’s Manual
Page A2 Appendix A –NMEA 2000®Interfacing Revision 1.0
Field 1: SID –The sequence identifier field is used to tie related PGNs together. For example,
the WSO200 will transmit identical SIDs for 130306 (Wind Data) and 130311
(Environmental Parameters) to indicate that the readings are linked together (i.e., the
data from each PGN was taken at the same time although they are reported at slightly
different times).
2: Temperature Instance –This field is used to distinguish the temperature reading from
this device from those of other devices. The value of this field is user-programmable.
3: Temperature Source –The WSO200 sets this field to a value of 0x01 to indicate that
the temperature reading is a reading of outside temperature.
4: Actual Temperature –This field is used to indicate the outside air temperature in units
of 0.01°K.
5: Set Temperature –This field is not used by the WSO200 and is set to a value of “Data
Not Available”.
6: Reserved
PGN 130313 –Humidity
The WSO200 uses this PGN to provide a regular transmission of outside humidity. The factory
default for periodic transmission rate is disabled. The transmission of this PGN can be enabled
(see PGN 126208 –NMEA Request Group Function –Transmission Periodic Rate).
Field 1: SID –The sequence identifier field is used to tie related PGNs together. For example,
the WSO200 will transmit identical SIDs for 130306 (Wind Data) and 130311
(Environmental Parameters) to indicate that the readings are linked together (i.e., the
data from each PGN was taken at the same time although they are reported at slightly
different times).
2: Humidity Instance –This field is used to distinguish the humidity reading from this
device from those of other devices. The value of this field is user-programmable.
3: Humidity Source –The WSO200 sets this field to a value of 0x01 to indicate that the
temperature reading is a reading of outside humidity.
4: Actual Humidity –This field is used to indicate the outside humidity in units of 0.004%.
5: Set Humidity –This field is not used by the WSO200 and is set to a value of “Data Not
Available”.
6: Reserved
PGN 130313 –Actual Pressure
The WSO200 uses this PGN to provide a regular transmission of atmospheric pressure. The
factory default for periodic transmission rate is disabled. The transmission of this PGN can be
enabled (see PGN 126208 –NMEA Request Group Function –Transmission Periodic Rate).
Field 1: SID –The sequence identifier field is used to tie related PGNs together. For example,
the WSO200 will transmit identical SIDs for 130306 (Wind Data) and 130311
(Environmental Parameters) to indicate that the readings are linked together (i.e., the
data from each PGN was taken at the same time although they are reported at slightly
different times).
2: Pressure Instance –This field is used to distinguish the pressure reading from this
device from those of other devices. The value of this field is user-programmable.
3: Pressure Source –The WSO200 sets this field to a value of 0x00 to indicate that the
temperature reading is a reading of atmospheric pressure.