EMS100
Engine Monitoring System
User’s Manual
Revision 1.1
Copyright © 2012 Maretron, LLP All Rights Reserved
Maretron, LLP
9014 N. 23
Phoenix, AZ 85021
http://www.maretron.com
Maretron Manual Part #: M001601
rd
Ave #10
Revision 1.1 Page i
EMS100 User’s Manual
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
Page ii Revision 1.1
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
2.4.1Connecting to NMEA 2000® Interface ........................................................ 3
2.4.2Checking Connections ................................................................................ 4
2.5 Configuration ............................................................................................................. 4
2.5.1Engine Instance .......................................................................................... 4
2.5.2Drive Trim Gauge Type .............................................................................. 5
2.5.3Drive Trim Sender Type ............................................................................. 5
2.5.4Drive Trim Sender Offset ............................................................................ 5
2.5.5Boost Pressure Gauge Type ...................................................................... 5
2.5.6Boost Pressure Sender Type ..................................................................... 5
2.5.7Boost Pressure Sender Offset .................................................................... 5
2.5.8Oil Pressure Gauge Type ........................................................................... 6
2.5.9Oil 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
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EMS100 User’s Manual
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
Page iv Revision 1.1
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:
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EMS100 User’s Manual
• 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 tac hometers
• 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 12pin 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
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