lxnav E500 Engine Monitoring Unit Installation Guide

Refer to the user manual for detailed pinout information for
NMEA2000 M12 connector and sensor connectors. Follow the provided
instructions for crimping and inserting wires correctly.

2. Configuring EMU:

Access the configuration settings via WiFi. Follow the steps
outlined in the manual under “Configuration via WiFi” to set up
your Engine Monitoring Unit according to your preferences.

3. Supported Data:

Ensure that the data you want to monitor is supported by the
EMU. Refer to the list of supported data in the manual and
configure the unit accordingly.

Frequently Asked Questions (FAQ):

Q: How do I update the firmware of the Engine Monitoring
Unit?

A: Firmware updates can be done over the NMEA2000 network or
using Wi-Fi. Follow the specific instructions provided in the
manual under “Firmware update” section for both methods.

Q: What should I do if I encounter a yellow triangle warning
while using the product?

A: Yellow triangle warnings indicate critical information that
should be carefully read and understood. Pay close attention to
these sections in the manual to operate the EMU safely.

“`

View Fullscreen

Engine Monitoring Unit
Version 2.44
LXNAV d.o.o. · Kidriceva 24, 3000 Celje, Slovenia · tel +386 592 33 400 fax +386 599 33 522 marine@lxnav.com · marine.lxnav.com Page 1 of 32

1 Important Notices

1.1 Limited Warranty

1.2 Packing Lists

2 Technical Data

2.1 General specifications

2.2 NMEA2000 specifications

2.3 Inputs

2.3.1 Analog inputs 1-5

2.3.2 Tach inputs (marked Frequency input 1-2)

2.4 Outputs

2.5 Accuracy

3 Engine monitor connectors

3.1 NMEA2000 M12 connector pinout

3.2 Sensor connectors pinout

3.3 Connector kit

3.4 Crimping and inserting wires

3.5 Examples for sensor connections

3.5.1 Resistive type sensors

3.5.2 Voltage type sensors with reference

3.5.3 Voltage output type sensors

3.5.4 Voltage output type sensors with external power supply

3.5.5 Current type output sensors

3.5.6 Anchor rode counter

3.5.7 Digital inputs

3.5.8 RPM

3.5.8.1 Legacy Marine Engines

3.5.8.2 More Exotic RPM sensing

4 Configuring EMU

4.1.1 Configuration via WiFi

4.1.1.1 Home

4.1.1.2 Config

4.1.1.3 Info

4.1.2 Firmware update

4.1.2.1 Firmware update over NMEA2000 network

4.1.2.2 Firmware update using Wi-Fi

5 Supported data

6 Revision history

Page 2 of 32

1 Important Notices
Information in this document is subject to change without notice. LXNAV reserves the right to change or improve their products and to make changes in the content of this material without obligation to notify any person or organization of such changes or improvements.
A Yellow triangle is shown for parts of the manual which should be read very carefully and are important when operating the E500/E700/E900.
Notes with a red triangle describe procedures which are critical and may result in loss of data or any other critical situation.
A bulb icon is shown when a useful hint is provided to the reader.
1.1 Limited Warranty
This Engine Monitoring Unit product is warranted to be free from defects in materials or workmanship for two years from the date of purchase. Within this period, LXNAV will, at its sole option, repair or replace any components that fail in normal use. Such repairs or replacement will be made at no charge to the customer for parts and labour, provided that the customer pays for shipping costs. This warranty does not cover failures due to abuse, misuse, accident, or unauthorized alterations or repairs.
THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED OR STATUTORY, INCLUDING ANY LIABILITY ARISING UNDER ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, STATUTORY OR OTHERWISE. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, WHICH MAY VARY FROM STATE TO STATE.
IN NO EVENT SHALL LXNAV BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, WHETHER RESULTING FROM THE USE, MISUSE, OR INABILITY TO USE THIS PRODUCT OR FROM DEFECTS IN THE PRODUCT. Some states do not allow the exclusion of incidental or consequential damages, so the above limitations may not apply to you. LXNAV retains the exclusive right to repair or replace the unit or software, or to offer a full refund of the purchase price, at its sole discretion. SUCH REMEDY SHALL BE YOUR SOLE AND EXCLUSIVE REMEDY FOR ANY BREACH OF WARRANTY.
To obtain warranty service, contacts your local LXNAV dealer or contact LXNAV directly.

April 2022

1.2 Packing Lists
· Engine monitoring unit · Installation manual · Female connector kit · Male connector kit · 33k, 68k, and 100k resistors for adjusting RPM signal level.

33k

68k

100k

Page 4 of 32

2 Technical Data

2.1 General specifications

Parameter Operating supply voltage (1) Absolute maximum supply voltage (2) Current consumption (1)

Condition
Non-operating Wi-Fi Enabled

Min Typ Max Unit

32 V

-50

36 V

170

Load equivalent number
Isolation between NMEA 2000 and engine network
Supply protection

Wi-Fi Enabled

LEN

1kV

Vrms

-50V

Operating temperature

-20

+65 °C

Storage temperature

-40

+85 °C

Recommended humidity

95 RH

Weight

115

Housing length

Housing diameter

Ingress Protection

TBD

Note1: Supplied via M12 NMEA2000 connector Note2: Non-operational, voltages outside of this range may permanently damage the device

Table1: General specifications

2.2 NMEA2000 specifications

Parameter Compatibility Bit rate

description NMEA2000 compatible 250kbps

Connection

A coded M12 connector

Note1: Supplied via M12 NMEA2000 connector

Table2: General specifications

Page 5 of 32

2.3 Inputs

2.3.1 Analog inputs 1-5
Engine monitoring unit features 5 fully configurable analogue inputs for: – Voltage sensors: 0-5V – Resistive: European, ABYC (US) and Asian standards – Current output sensor 4-20mA (external resistor required) – Digital input (Engine alarm input)
Reference connections for each of them are shown in chapter 3.5 Examples for sensor connections. All of the analogue inputs have an internal switchable pullup resistor to 5V, thereby relieving the user of manual resistor installation.

Parameter Input resistance Input capacitance Operating input range

Condition
0V < Vin < 30V Pullup disabled
0V < Vin < 30V Pullup disabled

Min Typ Max Unit

0.9

1.0

1.1 M

0.9 1.0 1.1 nF

18 V

Absolute maximum input voltage (1)

-36

36 V

Alarm input, logical HI state

4.5

18 V

Alarm input, logical LO state

3.0 V

Internal pullup resistance

Pullup enabled

500

Internal pullup voltage

Pullup enabled

TBD

TBD V

Note 1: Continuously applied voltage. Voltage outside of this range may permanently damage the device

Table 3: Analog input electrical characteristics

Page 6 of 32

2.3.2 Tach inputs (marked Frequency input 1-2)
Engine monitoring unit features 2 configurable tachometer inputs for RPM or Fuel Flow measurement. It can be configured as well as engine alarm input (Binary).
In case of Alarm input configuration, switch in this configuration needs external pull up resistor to 5V or 12V. Reference wiring diagram is same as for regular digital input.

Parameter

Condition

Min Typ Max Unit

Input resistance

0V < Vin < 30V

52 K

Input capacitance

1V < Vin < 30V

90 100 200 pF

Absolute maximum input (1)

-75

40 V

Rising threshold

3.5

Falling threshold

Frequency range

Vin = 5VAC

50 kHz

Note 1: Continuously applied voltage. Voltage outside of this range may permanently damage the device

Table 4: Tach inputs electrical characteristics

2.4 Outputs

Engine monitor unit also features one switchable 5V supply outputs for powering various sensors. The output has automatic resettable fuse protection against overcurrent, overvoltage and short-circuit faults.

Parameter

Condition

Min Typ Max Unit

Power output voltage

0 < Iload < 50mA

4.9

5.15 V

Power output current

Vout > 4.9V

50 mA

Short circuit current limit

Vout = 0V

85 130 mA

Maximum overload voltage (1)

-25

40 V

Note 1: Voltage forced back into the 5V output pin. Voltage outside of this range may permanently damage the device

Table 5: Power output electrical characteristics

Page 7 of 32

2.5 Accuracy
Shown accuracy limits represent the edges of the acceptable accuracy windows for the above specified operating conditions, typical values may be lower.

Parameter Voltage Input Accuracy
Resistive Input Accuracy
Frequency Input Accuracy Voltage Input ADC Resolution Resistive Input Resolution Frequency Input Resolution

Condition
0V < Vin < 18V 0 < Rin < 1K 1K < Rin < 5K
1Hz < fin < 1KHz

Value
1% of reading + 10mV TBD 1% of reading + 3 TBD
10% of reading + 100 TBD 1% of reading + 2 Hz TBD
4.5 mV TBD
0.05Hz

Table 6: Accuracy specifications

Page 8 of 32

3 Engine monitor connectors

M12 NMEA2000

Rubber EMU case

Male connector

Female connector

Cable to the engine

3.1 NMEA2000 M12 connector pinout
NMEA2000 pinout Male connector (pins)

12V

CAN_L

Ground

CAN_H

Figure 1: NMEA2000 M12 Male connector pinout (view from unit side)

Page 9 of 32

3.2 Sensor connectors pinout
As shown on the picture below, the pinout is shown from the unit side (not from the included connector kit side). Each input/output has a corresponding ground connection for the sensor itself.
Page 10 of 32

3.3 Connector kit
This chapter guides you through crimping the correct wires into the EMU connectors provided. Tools needed:
– Crimping pliers (recommended Engineer PA-01) – Wire stripper
Male connector kit
Female connector kit
Figure 2: Sensor connection kit
Figure 2 shows the contents of the sensor connection kit. It contains: – Male and female connector housing – 8 crimp contacts for each connector (blade and socket) – Watertight grommets – Endcap for both of the connectors
Page 11 of 32

3.4 Crimping and inserting wires
Step 1: Pull water grommet on wire and strip insulation off the copper. Stripped length should be somewhere around 5mm.
Step 2: Insert the crimp contact into the crimping pliers (die head 0.5mm) and gently grip the contact so that it stays put. Note that the pliers must only “grab” the grip shell on the crimp contact.
Step 3: Insert the wire into the crimp contact until you only see the insulation. Now apply pressure to the pliers all the way down.
Page 12 of 32

Step 5: The result from step 4 should look like the picture below. Now pull the watertight grommet between last two opened crimp pads see green box in picture bellow.
Step 6: Crimp the insulating shell with grommet together. Insert the crimped wire into the INS portion (or >2.5mm die size of a crimping plier) and apply pressure to the crimping tool.
The result should look something like the picture below
Page 13 of 32

Step 7: Insert the crimped contact with the watertight grommet into the appropriate connector housing.
Make sure that you hear a click sound and the grommet slides inside (see picture below).
Repeat Step 1 through Step 7 until all of the connections are wired. Final step: Insert the end cap into the connector so that it lines up with the outer shell.
Page 14 of 32

3.5 Examples for sensor connections
3.5.1 Resistive type sensors
Male connector
Ground for Analog input 1 Ground for Analog input 2 Ground for Analog input 3 Ground for Analog input 4
Resistive type
sensor
Analog input 4 Analog input 3 Analog input 2 Analog input 1 Figure 3: Resistive type sensor connection (view from unit side) Note: Use adjacent ground connections for sensor pairs. There are pins for exactly 4 sensor (8 wires).
3.5.2 Voltage type sensors with reference
In case that we want to keep old gauges for indication engine parameters, the EMU can be connected following way. The generic voltage input must be selected. Because the external power supply is not stable. Due to alternator, the power supply voltage may vary. The measurement on the sensor will also drift with like power supply. We can compensate that, if we use additional analogue input as voltage reference. At the end is necessary to enter at least two calibration points.
Figure 4: Resistive type sensor with external supply (view from unit side) Page 15 of 32

3.5.3 Voltage output type sensors
Ground for Analog input 1 Ground for Analog input 2 Ground for Analog input 3 Ground for Analog input 4
Male connector

Analog input 4 Analog input 3 Analog input 2 Analog input 1

Signal line

Ground for 5V Power Ground for Analog input 5 Ground for Frequency input 1 Ground for Frequency input 2

Female connector

Voltage output
type sensor

Frequency input 2 Frequency input 1 Analog input 5 (as Reference) 5V Power
Figure 5: Voltage output type sensor connection (view from unit side)

Page 16 of 32

3.5.4 Voltage output type sensors with external power supply
If we want to measure a value (eg. Fuel) from 3rd party system, an external voltage reference is necessary to be measured. For that purpose, we will configure one of analogue inputs as voltage reference. This pin will be connected to the power supply, where sensor is already supplied (black on the figure). Another input will be configured as “Generic voltage with reference”. Then we can calibrate fuel tank.

Ground for Analog input 1 Ground for Analog input 2 Ground for Analog input 3 Ground for Analog input 4
Male connector

Analog input 4 Analog input 3 Analog input 2 Analog input 1

Signal line

Ground for 5V Power Ground for Analog input 5 Ground for Frequency input 1 Ground for Frequency input 2

Female connector

Voltage output
type sensor

3rd party system

Frequency input 2 Frequency input 1 Analog input 5 (as Reference) 5V Power
Figure 6: Voltage output type sensor with reference connection (view from unit side)

3.5.5 Current type output sensors

Male connector

Ground for Analog input 1 Ground for Analog input 2 Ground for Analog input 3 Ground for Analog input 4

Signal line from sensor

12V
Current Output sensor

Analog input 4 Analog input 3 Analog input 2 Analog input 1

Pull down resistor 220

Figure 7: Current output type sensor (view from unit side)

Page 17 of 32

3.5.6 Anchor rode counter

Figure 8: Anchor rode counter sensor (view from unit side)

3.5.7 Digital inputs
Male connector
Ground for Analog input 1 Ground for Analog input 2 Ground for Analog input 3 Ground for Analog input 4

12V
Pull up resistor 10 k

Switch

Analog input 4

Signal line

Analog input 3

Analog input 2

Analog input 1

Figure 9: Digital input used with external switch (view from unit side)

Page 18 of 32

3.5.8 RPM
The EMU provides for the digitization of engine speed data for a wide range of engines that were designed or built before the wide spread implementation of N2K data networks. These legacy engines fall into two main groups. Compression Ignition engines and Spark Ignition engines. Further these can be grouped mechanical control, Electronic control or Electronic control with IC (Micro computer / Logic)

EMU has two inputs for RPM sensors. They have an internal resistance of 51k. They are designed for passive P-lead sensing, but with some external components, they can be used
in other situations also.

In general legacy engines fall into the following groups.

· Outboard Motors · Diesel Engines, Purpose built Marine and Marine adapted Automotive · Petrol Engines, Marine adapted Automotive

3.5.8.1

Legacy Marine Engines

Outboard Motors

· Direct P-lead sensing from Lighting / Charge Coils

· Active P-lead sensing from ECU pin (Alternator equipped OB Motors)

Direct P-lead sensing from Lighting / Charge Coils is desirable because of low voltages and frequencies involved. This has long been the preferred method of major Outboard Motor producers. The line voltage is controlled indirectly by the state of charge of the start battery. For single or three phase systems you need only tap into one of the phase wires at the rectifier connection point. Often the engine manufacturer will provide a double header plug on one of the phase wires for this purpose.

Page 19 of 32

Common flywheels have, 4,6 or 12 poles. You will need to know the number of poles to complete the calibration described in chapter 4.1.1.2.1.1
Figure 9: Typical OB Motor Wiring #10 Rectifier #2 Charge Coils. At interconnection Extra socket can be found for Tacho Sensing
Active P-lead sensing from ECU pin. At the close of the twentieth century there was a general race between outboard manufacturers to increase the output of their battery charging systems. Some builders choose fit alternators. In such cases it is likely that the ECU will have been adapted or newly developed to provide a synthetic “charge coil” pulse. This was a general practice driven by the will to have standard Tachometers for all models. Diesel Engines
– Passive P-lead sensing from Injector Pump (Inductive Pickup) – Passive P-lead sensing from Alternator (Bosch W Terminal) – Active P-lead sensing from ECU pin Passive P-lead sensing from injector pump pickup. On Diesel engines with mechanical injector pumps, take time to inspect the pump for any electrical connection. Commonly you may find a fuel cut (stop) solenoid. In addition, many injector pumps are fitted with a Inductive Pickup specifically to measure engine RPM Passive P-lead sensing from the alternator. This is very similar to the charge coil connection on and Outboard Motor. In this case the a connection is made inside the alternator. The pulse is taped to one of the phase connections before the rectifier assembly. The most commonly used marine alternators are 12 pole, however you must consider also the overdrive ratio of the alternator drive. Typically, the alternator speed is three or more times greater than the engine speed.
Page 20 of 32

Active P-lead sensing from ECU pin. More advanced Diesel engines included electronic control of the injector pump and later direct control of injectors on common rail engines. On such engines it is very common to find a pin on the ECU which outputs a synthetic pickup coil pulse.
Most high-speed marine diesel engines will tolerate running at high idle without danger of internal damage. Check with your engine builder! In such cases the injection system controls the engine speed in very tight control at max speed with no load (Idle). Typical margin may be just +/- 30 RPM. This speed <High Idle> will be publish on the engine spec sheet and is ideal for checking / adjusting calibration of Tachometer.
Petrol Inboard Engine
– Direct P-lead sensing from Ignition Coil (Primary Coil)
– Passive P-lead sensing from Alternator (Bosch W Terminal)
– Active P-lead sensing from ECU pin
Direct P-lead sensing from the ignition coil is an acceptable solution but has some risk of high voltage exposure back EMF and so on. Please review Magneto comments below as some of these ideas could be relevant to this method. Typically the ignition coil it sensed at the (-) of the primary coil. There is a direct connection to the secondary winding inside the coil, which under certain condition deliver high voltage spikes. Assuring a perfect grounding of the coil enhance proper ignition and greatly reduces risk of unwanted spikes/ interference.
Passive P-lead sensing from the alternator. See details in Diesel section above. However, in this case more effort is required. You will need to measure / calculate the overdrive ratio. Then research pole count for the alternator used. Given this data the RPM vs. Pulse rate factor can be calculated.
Active P-lead sensing from ECU pin. Modern petrol engines with electronic ignition, EFI, MPI normally have ECU adapted or developed to drive legacy marine tachometers. On such engines it is very common to find a pin on the ECU which outputs a synthetic pickup coil pulse.
Petrol engines are not tolerant of running at high speed with no load. Such practice should be strictly avoided.

3.5.8.2

More Exotic RPM sensing

– Direct P-lead sensing from magnetos – Figure 10: Direct P-lead sensing
– Active P-lead sensing from magnetos (JPI 420815) – Figure 11: Active P-lead sensing from magnetos
– Passive P-lead sensing from magnetos (inductive pickup) – Figure 13: Passive P-lead sensing from magnetos

Page 21 of 32

Direct P-lead sensing from magnetos is the least preferable way of measuring RPM.
Because of high voltage spikes on magnetos, user must include a series resistor that has a
value of 33k. If the readings are unstable, the user must increase the value of the resistor (100k or more) until the issue is resolved. Be sure to mount the resistors near the ignition switch, since magnetos are high voltage spikes that cause a lot of EM interference. This is
the least preferable way of measuring RPM, because it does not isolate EMU from the
damaging high voltage spikes generated on the magnetos.

Figure 10: Direct P-lead sensing (view from unit side)

Active P-lead sensing from magnetos is a preferred method of measuring RPM. Sensors like the JPI 420815 have an open-collector digital output (no high voltage spikes) and isolates the EMU from the magnetos. Error! Reference source not found.7 shows connection for such a sensor. Since RPM inputs on the eBox have no internal pullup, user must include a pullup 2.2k to +12V.

Ground for 5V Power Ground for Analog input 5 Ground for Frequency input 1 Ground for Frequency input 2
Female connector
Frequency input 2 Frequency input 1 Analog input 5 5V Power

12V
Optional pull up resistor
2.2k
GND RPM signal Power supply 5V
JPI420815

Figure 11: Active P-lead sensing from magnetos (view from unit side)

Page 22 of 32

Passive P-lead sensing is also an option for measuring RPM with eBox. A good example is the Rotax 912 which has a passive inductive pickup. Figure 12 shows the connections for this kind of sensing.
Figure 13: Passive P-lead sensing from magnetos (view from unit side)
Page 23 of 32

4 Configuring EMU
To operate properly EMU must be configured properly for each sensor connected to particular port. Configuration can be performed via WiFi connection or via CAN bus with one of LXNAV compatible devices.

4.1.1 Configuration via WiFi
EMU has integrated Wi-Fi hot spot, to which you can connect with your smartphone. Password can be copied from label on EMU unit or QR code. You may get a message from the system, that there may not be available internet connection. You must run a web browser on your smartphone and enter IP address http://192.168.4.1.
Configuration consist of three pages. Home, Config and Info

4.1.1.1

Home

On home page user can view all configured sensor data.

4.1.1.2

Config

On this page user configure function of each port of the SmartEMU.

SmartEMU has: · 2 digital available inputs · 5 analogue available inputs.

Page 24 of 32

Digital inputs have following functions: · Engine RPM · Fuel flow · Engine & Transmission & Bilge Status · Anchor direction down
Analog inputs can be configured for following functionality: · Fluid level · Engine oil pressure · Engine oil temperature · Coolant temperature · Rudder angle · Engine & Transmission & Bilge status · External voltage reference · Engine boost pressure · Engine tilt/trim · Engine fuel pressure · Engine coolant pressure · Alternator voltage potential · Engine load · Engine torque · Transmission oil pressure · Transmission oil temperature · Exhaust temperature · Anchor length · Anchor direction down · Trim tabs
Page 25 of 32

4.1.1.2.1 Digital input functions

4.1.1.2.1.1 Engine RPM
In RPM configuration menu, we can set multiplying factor, to match number of pulses with number of revolutions per minute of the engine. In this page we can set also the engine hours. All changes must be saved if we want to keep them. The basic formula to calculate factor is: Multiplication Factor = Number of pulses per revolution.

4.1.1.2.1.2 Fuel flow
If we select fuel flow sensor for digital input, we must select the type of the connected fuel flow sensor. On the market is plenty of different fuel flow sensors. Each sensor gives defined number of pulses per volume (litre or gallon)

4.1.1.2.1.3 Engine & Transmission & Bilge status
Digital inputs can be configured for the functionality:
· Check engine · Engine Over temperature · Engine over temperature · Engine low oil pressure · Engine low oil level · Engine low fuel pressure · Engine low system voltage · Engine low coolant level · Water flow · Water in fuel · Charge indicator · Preheat indicator · High boost pressure · Rev limit exceeded · EGR system · Throttle position sensor · Engine emergency stop · Engine warning level 1 · Engine warning level 2 · Power reduction · Engine maintenance needed · Engine communication error · Sub or secondary throttle · Neutral start protect · Engine shutting down · Transmission check temperature · Transmission over temperature · Transmission low oil pressure · Transmission low oil level · Transmission sail drive warning · Bilge pump running

following

Page 26 of 32

4.1.1.2.1.4 Anchor direction down This feature is employed within an anchor winch or windlass system to set the indication of the direction during the process of raising or lowering the anchor.
4.1.1.2.2 Analog inputs functions 4.1.1.2.2.1 Fluid level If input type is configured as fluid level, next setting is sensor type. Supported sensor types are resistive and voltage sensors. Next setting, which must be selected is the type of the fluid and last the tank volume. EMU has capability to calibrate fluid tank in 12 points. Calibration is stored in the EMU unit. All changes must be confirmed with save button. 4.1.1.2.2.2 Oil pressure If input type is selected oil pressure, we need select just a sensor type connected to that input. 4.1.1.2.2.3 Oil temperature If input type is selected oil temperature, we need select just a type of temperature sensor connected to that input. 4.1.1.2.2.4 Engine temperature If input type is selected engine temperature, we need select just a type of temperature sensor connected to that input. 4.1.1.2.2.5 Rudder angle If input type is selected rudder sensor, we need select just a type of rudder sensor connected to that input. 4.1.1.2.2.6 Engine & Transmission & Bilge status
Page 27 of 32

4.1.1.2.2.7 External voltage reference Voltage reference input is used, when we want to connect parallel to existing measurement system. For example, we want to measure fuel level and we want to connect to existing analogue gauge. In this case the voltage reference pin will be connected to power supply of the gauge/sensor that is used for measurement of the fuel level. Another input must be assigned as fluid level and sensor type must be selected as generic voltage with reference. In this case the minimum reading of the sensor is at 0V, maximum reading of the sensor is at voltage that is measured on voltage reference input pin. In the case of the fuel level sensor, it can be still calibrated in 12 custom points. with reference. In this case the minimum reading of the sensor is at 0V, maximum reading of the sensor is at voltage that is measured on voltage reference input pin. In the case of the fuel level sensor, it can be still calibrated in 12 custom points.
4.1.1.2.2.8 Engine boost pressure
4.1.1.2.2.9 Engine tilt/trim
4.1.1.2.2.10 Engine fuel pressure
4.1.1.2.2.11 Engine fuel pressure
4.1.1.2.2.12 Engine coolant pressure
4.1.1.2.2.13 Alternator voltage potential
4.1.1.2.2.14 Engine load
4.1.1.2.2.15 Engine torque
4.1.1.2.2.16 Transmission oil pressure
4.1.1.2.2.17 Transmission oil temperature
4.1.1.2.2.18 Exhaust temperature
4.1.1.2.2.19 Anchor length Define the type of anchor being used. Adjust the Centimeters per pulse (revolution) according to the circumference of the windlass. Line correction (experimental) is unnecessary if the anchor employs only a chain. Enabling Line Correction (experimental) allows the algorithm to identify the transition from rope to chain, and automatically adjust the counter value (which can be incorrect due to the rope stretchiness). Calibration Procedure: Ensure the anchor is fully retracted before calibration. Press the calibrate button and wait until the anchor is completely released, then press save to initiate calibration.
4.1.1.2.2.20 Anchor direction down
4.1.1.2.2.21 Trim tabs
Page 28 of 32

4.1.1.3

Info

On info page is information about EMU unit serial number, firmware version, …

4.1.2 Firmware update
Firmware update can be performed via NMEA2000 network or via Wi-Fi.

4.1.2.1

Firmware update over NMEA2000 network

To perform firmware update via NMEA2000 network, you need one of LXNAV NMEA2000 displays connected to network (E350, E500, E700, E900).

4.1.2.2

Firmware update using Wi-Fi

· Please download with smart phone the latest firmware from the LXNAV web site. · Connect to the Wi-Fi of the SmartEMU

Page 29 of 32

· Go under device info menu

· Scroll down and press BROWSE

· Select the downloaded firmware file (normally it is downloaded into downloads folder) and press UPLOAD

· When upload is COMPLETED, press UPDATE

· Wait a minute and device will be updated with new firmware.
Page 30 of 32

5 Supported data

NMEA 2000 compliant PGN List NMEA 2000 PGN (transmit)

59392 59904 60160 60416 60928 61184 65280 126208 126720 126993 126996 127245 127488 127489 127493 127505 128777 130316 130576 130825 130884

ISO ack ISO request ISO transport protocol – data transfer ISO transport protocol – command ISO address claim ISO proprietary a ISO proprietary b Group function ISO proprietary a2 Heartbeat Product information Rudder Engine parameters, rapid update Engine parameters, dynamic Engine transmission parameters Fluid level Anchor Windlass Operating Status Temperature, Extended range Trim Tas Status Proprietary LXNAV message fast broadcast Proprietary LXNAV raw fast broadcast

NMEA 2000 PGN (Receive)

59392 59904 60160 60416 60928 61184 65280 126208 126720 130816 130825 130884

ISO ack ISO request ISO transport protocol – data transfer ISO transport protocol – commands ISO address claim ISO proprietary A ISO proprietary B Group function ISO proprietary A2 Proprietary multipart broadcast Proprietary LXNAV message fast broadcast Proprietary LXNAV raw fast broadcast

Page 31 of 32

6 Revision history

Date June 2019 July 2019

Revision 1 2

January 2020 3

January 2020 4

April 2020

July 2020

May 2021

April 2022

October 2023 10

March 2024

September 2024 12

Description Initial release of this manual Added image descriptions for connector pinout clarity Corrected connector polarity New pinouts, sensor wirings. Technical data rewritten Modified chapter 3.4 Added supported pgn list 5 Updated chapters 2.3, 3.5 Added Chapter 4.1.2 Updated chapter 2.3.2, added chapter 3.5.2 Updated chapter 3.5.2 Updated chapter 3.5.6, 4.1.1.2, image description updated Updated values for current consumption and load equivalent number

Page 32 of 32

Documents / Resources

lxnav E500 Engine Monitoring Unit [pdf] Installation Guide
EMU, E500, E700, E900, E500 Engine Monitoring Unit, E500, Engine Monitoring Unit, Monitoring Unit

References

User Manual

E500 Engine Monitoring Unit

Specifications:

General Specifications:

NMEA2000 Specifications:

Product Usage Instructions:

1. Engine Monitor Connectors:

2. Configuring EMU:

3. Supported Data:

Frequently Asked Questions (FAQ):

Q: How do I update the firmware of the Engine Monitoring
Unit?

Q: What should I do if I encounter a yellow triangle warning
while using the product?

Documents / Resources

References

Leave a comment

Cancel reply