Maretron EMS100 User manual

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Revision 1.1 Page i
EMS100
Engine Monitoring System
User’s Manual
Revision 1.1
Copyright © 2012 Maretron, LLP All Rights Reserved
Maretron, LLP
9014 N. 23rd Ave #10
Phoenix, AZ 85021
http://www.maretron.com
Maretron Manual Part #: M001601

EMS100 User’s Manual
Page ii Revision 1.1
Revision History
Revision Description
1.0 Original document
1.1 Added information on tachometer connection
Added factory default number of flywheel teeth
Added information on which fields of transmitted PGN’s are populated

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Revision 1.1 Page iii
Table of Contents
1General..............................................................................................................................1
1.1Introduction................................................................................................................1
1.2Firmware Revision.....................................................................................................1
1.3Features....................................................................................................................1
1.4Quick Install...............................................................................................................2
2Installation..........................................................................................................................2
2.1Unpacking the Box ....................................................................................................2
2.2Choosing a Mounting Location..................................................................................2
2.3Mounting the EMS100...............................................................................................3
2.4Connecting the EMS100............................................................................................3
2.4.1Connecting to NMEA 2000®Interface ........................................................3
2.4.2Checking Connections................................................................................4
2.5Configuration.............................................................................................................4
2.5.1Engine Instance..........................................................................................4
2.5.2Drive Trim Gauge Type..............................................................................5
2.5.3Drive Trim Sender Type .............................................................................5
2.5.4Drive Trim Sender Offset............................................................................5
2.5.5Boost Pressure Gauge Type......................................................................5
2.5.6Boost Pressure Sender Type .....................................................................5
2.5.7Boost Pressure Sender Offset....................................................................5
2.5.8Oil Pressure Gauge Type...........................................................................6
2.5.9Oil Pressure Sender Type..........................................................................6
2.5.10Oil Pressure Sender Offset....................................................................6
2.5.11Water Temperature Gauge Type...........................................................6
2.5.12Water Temperature Sender Type ..........................................................6
2.5.13Water Temperature Sender Offset.........................................................6
2.5.14Engine Hours.........................................................................................6
2.5.15Flywheel Teeth ......................................................................................7
2.5.16NMEA 2000®PGN Enable/Disable........................................................7
2.5.17Restore Factory Defaults.......................................................................7
3Maintenance ......................................................................................................................7
4Troubleshooting.................................................................................................................8
5Technical Specifications...................................................................................................10
5.1Specifications ..........................................................................................................10
5.2Certifications............................................................................................................10
5.3NMEA 2000®Parameter Group Numbers (PGNs) ..................................................10
Technical Support.....................................................................................................................11
Installation Template ................................................................................................................12
Maretron (2 Year) Limited Warranty .........................................................................................13

EMS100 User’s Manual
Page iv Revision 1.1
Table of Figures
Figure 1 – Mounting the EMS100.............................................................................................. 3
Figure 2 – NMEA 2000®Connector Face Views ....................................................................... 4
Figure 3 – Mounting Surface Template ................................................................................... 12
Table of Appendices
Appendix A – NMEA 2000®Interfacing....................................................................................A1

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Revision 1.1 Page 1
1 General
1.1 Introduction
Congratulations on your purchase of the Maretron EMS100 Engine Monitoring System.
Maretron has designed and built your engine monitoring system to the highest standards for
years of reliable, dependable, and accurate service.
The EMS100 plugs directly into engine wiring harnesses (through the use of a Maretron wiring
harness, purchased separately) and converts analog signals such as water temperature and
oil pressure to the NMEA 2000®digital interface. Critical engine data is then distributed
throughout the vessel over a single cable where it can be monitored by any NMEA 2000®
compatible display. The EMS100 is compatible with existing instrument panels and key
switches so you don’t need to remove them while upgrading to newer digital technology. For
new installations, the EMS100 and a compatible NMEA 2000®display can replace the
traditional analog instrument panel.
The Maretron EMS100 is designed to operate within the harsh demands of the marine
environment. However, no piece of marine electronic equipment can function properly unless
installed, configured, and maintained in the correct manner. Please read carefully and follow
these instructions for installation, configuration, and usage of the Maretron EMS100 in order to
ensure optimal performance.
1.2 Firmware Revision
This manual corresponds to EMS100 firmware revision 1.1.1.
1.3 Features
The Maretron EMS100 Engine Monitoring System provides the following information on the
NMEA 2000®bus.
•Tachometer
•Engine Hours
•Coolant Water Temperature
•Engine Oil Pressure
•Boost Pressure
•Charging Voltage
•Drive Trim
•Fuel Filter Alarm
•Boost Alarm
•Coolant Water Level Alarm
•Engine Oil Pressure Alarm
•Exhaust (Salt Water Flow) Alarm
•Coolant Water Temperature Alarm
The EMS100 is compatible with these Yanmar engines:

EMS100 User’s Manual
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•GM Series
•YM Series
•JH Series
•LH Series
•LP Series
•LY Series
The EMS100 has the following additional features:
•Waterproof Enclosure and Cable System
•Connects to Analog or Digital tachometers
•Can Work With or Without Existing Analog Gauges
1.4 Quick Install
Installing the Maretron EMS100 Engine Monitoring System involves the following five steps.
Please refer to the individual sections for additional details.
1. Unpack the Box (Section 2.1)
2. Choose a Mounting Location (Section 2.2)
3. Mount the EMS100 Engine Monitoring System (Section 2.3)
4. Connect the EMS100 Engine Monitoring System (Section 2.4)
5. Configure the EMS100 Engine Monitoring System (Section 2.5)
2 Installation
2.1 Unpacking the Box
When unpacking the box containing the Maretron EMS100, you should find the following items.
•1 – EMS100 Engine Monitoring System
•1 – EMS100 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 EMS100 is mounted between the engine and the NMEA 2000®network. Please consider
the following when choosing a mounting location.
1. The EMS100 is waterproof, so it can be mounted in a damp or dry location.
2. The orientation is not important, so the EMS100 can be mounted on a horizontal deck,
vertical bulkhead, or even upside down if desired.
3. The EMS100 is temperature rated to 55°C (130°F), so it should be mounted away from
engines or engine rooms where the operating temperature exceeds the specified limit.

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2.3 Mounting the EMS100
Attach the Maretron EMS100 securely to the vessel using bolts or screws (not included) as
shown in Figure 1 below.
Figure 1 – Mounting the EMS100
2.4 Connecting the EMS100
You connect the EMS100 using a Maretron wiring harness (available separately) which is
designed for a particular type of engine. One end of the Maretron wiring harness has two 12-
pin Deutsch connectors which plug into the two connectors on the end of the EMS100 product
enclosure. These connectors are keyed differently, so there is no danger of plugging these in
incorrectly.
2.4.1 Connecting to NMEA 2000®Interface
The Maretron EMS100 provides a connection to an NMEA 2000®interface through a five pin
male connector located on the Maretron wiring harness, which is purchased separately (see

EMS100 User’s Manual
Figure 2). You connect the EMS100 to an NMEA 2000®network by plugging the male
connector into a female receptacle of the NMEA 2000® network (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. The EMS100 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 2 – NMEA 2000®Connector Face Views
2.4.2 Checking Connections
Once the engine harness connections to the Maretron EMS100 have been completed and the
engine harness has been connected to the NMEA 2000®bus, supply power to the engine and
check to see that engine information is being properly transmitted by observing an appropriate
display. Refer to Section 4, “Troubleshooting”, if no engine information appears, otherwise
proceed to Section 2.5 entitled “Configuration”.
2.5 Configuration
There are several configurable items within the EMS100. You configure the EMS100 using a
Maretron DSM250 display or other NMEA 2000®display unit that is capable of configuring the
EMS100. Please refer to the Maretron DSM250 User’s Manual for details. Descriptions of the
various configurable items appear in the following sections.
2.5.1 Engine Instance
In order to allow display equipment to distinguish between data coming from different engines,
the NMEA 2000®network requires that each engine be assigned a unique instance number in
the range of 0-252. The EMS100 comes from the factory programmed with an instance
number of 0. Conventions for instance numbers for common engine configurations are as
follows:
•Single Engine = 0
Page 4 Revision 1.1
•Dual Engines: Port Engine = 0, Starboard Engine = 1

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•Triple Engines: Port Engine = 0, Starboard Engine = 1, Center Engine =2
2.5.2 Drive Trim Gauge Type
The EMS100 comes from the factory preprogrammed with the characteristics of drive trim
gauge types for supported engines. If the EMS100 is used with an analog drive trim gauge,
you must select the correct type of gauge for this setting in order for the data to be displayed
correctly. If you have no drive trim gauge present, select the “No Gauge” option for this
setting.
2.5.3 Drive Trim Sender Type
The EMS100 comes from the factory preprogrammed with the characteristics of drive trim
senders for supported engines. If the engine to which you are connecting the EMS100 has a
drive trim sender, you must select the correct type of drive trim sender for this setting in order
for the data to be displayed correctly. If you have no drive trim sender present, select the
“Disabled” option for this setting.
2.5.4 Drive Trim Sender Offset
Often, the characteristics of individual drive trim senders vary from their specified values. This
setting allows you to apply an offset to the resistance value of the drive trim sender in order to
allow you to bring the digital value reported by the EMS100 into agreement with that displayed
by the analog gauge.
2.5.5 Boost Pressure Gauge Type
The EMS100 comes from the factory preprogrammed with the characteristics of boost
pressure gauge types for supported engines. If the EMS100 is used with an analog boost
pressure gauge, you must select the correct type of gauge for this setting in order for the data
to be displayed correctly. If you have no boost pressure gauge present, select the “No Gauge”
option for this setting.
2.5.6 Boost Pressure Sender Type
The EMS100 comes from the factory preprogrammed with the characteristics of boost
pressure senders for supported engines. If the engine to which you are connecting the
EMS100 has a boost pressure sender, you must select the correct type of boost pressure
sender for this setting in order for the data to be displayed correctly. If you have no boost
pressure sender present, select the “Disabled” option for this setting.
2.5.7 Boost Pressure Sender Offset
Often, the characteristics of individual boost pressure senders vary from their specified values.
This setting allows you to apply an offset to the resistance value of the boost pressure sender
in order to allow you to bring the digital value reported by the EMS100 into agreement with that
displayed by the analog gauge.

EMS100 User’s Manual
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2.5.8 Oil Pressure Gauge Type
The EMS100 comes from the factory preprogrammed with the characteristics of oil pressure
gauge types for supported engines. If the EMS100 is used with an analog oil pressure gauge,
you must select the correct type of gauge for this setting in order for the data to be displayed
correctly. If you have no oil pressure gauge present, select the “No Gauge” option for this
setting.
2.5.9 Oil Pressure Sender Type
The EMS100 comes from the factory preprogrammed with the characteristics of oil pressure
senders for supported engines. If the engine to which you are connecting the EMS100 has a
oil pressure sender, you must select the correct type of oil pressure sender for this setting in
order for the data to be displayed correctly. If you have no oil pressure sender present, select
the “Disabled” option for this setting.
2.5.10 Oil Pressure Sender Offset
Often, the characteristics of individual oil pressure senders vary from their specified values.
This setting allows you to apply an offset to the resistance value of the oil pressure sender in
order to allow you to bring the digital value reported by the EMS100 into agreement with that
displayed by the analog gauge.
2.5.11 Water Temperature Gauge Type
The EMS100 comes from the factory preprogrammed with the characteristics of water
temperature gauge types for supported engines. If the EMS100 is used with an analog water
temperature gauge, you must select the correct type of gauge for this setting in order for the
data to be displayed correctly. If you have no water temperature gauge present, select the “No
Gauge” option for this setting.
2.5.12 Water Temperature Sender Type
The EMS100 comes from the factory preprogrammed with the characteristics of water
temperature senders for supported engines. If the engine to which you are connecting the
EMS100 has a water temperature sender, you must select the correct type of water
temperature sender for this setting in order for the data to be displayed correctly. If you have
no water temperature sender present, select the “Disabled” option for this setting.
2.5.13 Water Temperature Sender Offset
Often, the characteristics of individual water temperature senders vary from their specified
values. This setting allows you to apply an offset to the resistance value of the water
temperature sender in order to allow you to bring the digital value reported by the EMS100 into
agreement with that displayed by the analog gauge.
2.5.14 Engine Hours
The EMS100 reports engine hours based on how long the EMS100 has been powered from
the engine. The EMS100 comes from the factory preprogrammed with an engine hours
reading of 0 hours. If you are installing the EMS100 on an engine that has been in service, or