EMU-1 NMEA 2000® Engine Monitoring Unit Engine Monitoring Unit

Share engine information on the NMEA 2000 bus.

The Actisense EMU-1 is a specialized analogue to NMEA 2000 Gateway which converts data from analogue engine gauges/senders into NMEA 2000 data. The EMU-1 enables the sharing of engine data throughout the NMEA 2000 bus. It digitises analogue engine sensors, enabling NMEA 2000 display devices to monitor the connected engine(s) on a vessel.

The EMU-1 can monitor vital engine parameters such as temperature, pressure RPM and fluid levels from up to two engines.

Where To Buy

EMU-1 Engine Monitoring Unit

STNG Cable

The EMU-1 has a PC based configuration tool that allows the settings inside the EMU-1 to be changed to best suit the engine it is working with, making it a flexible solution for many engine makes and models. An Actisense PC to NMEA 2000 Gateway (NGT-1) is required to configure the EMU-1.

It is recommended that an NGT-1 is available for every EMU-1 installation. The NGT-1 can be used to update the firmware, connect the Toolkit and display data on a PC for diagnostic and information purposes, using NMEA Reader. Please visit the NGT-1 page for product details.

Ordering Information

(Part number/s)

  • EMU-1

The EMU-1 is available with the SeaTalkNG to NMEA 2000 adaptor Cable – STNG-A06045
The SeaTalk NG to NMEA 2000® adaptor cable (STNG-A06045) is not available as a standalone product and must be bought as part of a bundle.

An optional DIN rail mounting kit is also available. The kit is suitable for use with a top hat rail, type EN 50 022 or a G section rail, type EN 50 035. Please order the DIN rail kit using part number: DIN-KIT-1.

FEATURES

  • Enables analogue signals to be converted to NMEA 2000 messages
  • Convert signals from up to two engines (that share a common ground) with a single EMU-1
  • 6 gauge / parameter inputs
  • 4 alarm inputs
  • 2 additional auxiliary inputs
  • 2 Tacho inputs
  • Customised IP65 case
  • Diagnostic LED’s
  • Wide power compatibility of 9 to 35 Vdc

 

BENEFITS

  • No need to change an existing engine
  • Easy installation
  • Easy to configure to suit the connected engine
  • Connect signals from fluid level gauges (that share a common ground with the engine) to NMEA 2000®
  • Optional DIN rail mounting kit available
  • Total engine hours are logged by the monitoring of engine Tach (RPM) input
Power Supply
Supply Voltage9 to 35V DC
Supply CurrentTypically < 25mA @ 12V DC
Supply ProtectionContinuous reverse polarity protection and load dump protection (meets SAE J1113)
Supply ConnectorPluggable 2-way screw terminal, 3.5mm pitch
Supply Voltage (NMEA 2000 Port)9 to 29V DC
Supply Current (NMEA 2000 Port)< 20mA @ 12V DC from NMEA 2000 bus
Load Equivalent Number (LEN)1
Supply Protection (NMEA 2000 Port)

 

Continuous reverse polarity protection and overvoltage protection to 40V

 

NMEA 2000 Port – In/Out
CompatibilityFully NMEA 2000 certified
Galvanic Isolation2500V input to ground, 1500V output to ground using ISO-Drive
Speed / Baud Rate250kbps
NMEA 2000 Connector

 

M12 male (A coded) connector

 

Gauge Inputs
Voltage Range0 to 35V DC
Input Impedance> 50kΩ
Sender Feed0, 4 or 18mA
Accuracy<= 2%
Input ConnectorPluggable 6-way screw terminal, 3.5mm pitch
Input Protection

 

Overvoltage protection to ±40V

 

Alarm Inputs
Voltage Range0 to 37V DC
Input Impedance> 50kΩ
Threshold VoltageConfigurable, default is 5V
Alarm PolarityConfigurable, default is alarm on low input
Accuracy<= 2%
Input ConnectorPluggable 4-way screw terminal, 3.5mm pitch
Input Protection

 

Overvoltage protection to ±40V

 

Tacho Inputs
Voltage Range±3 to ±60V
Input Impedance> 100kΩ to ground
Input Pulse Range4 to 50,000Hz
Accuracy<= 1%
Sender CompatibilityIgnition coil, alternator (“W”, “R” or “AC”) terminal, hall effect, VR or inductive sender
ThresholdAutomatically adjusts to signal level
Input ConnectorPluggable 4-way screw terminal, 3.5mm pitch
Input Protection

 

Can withstand an ignition pulse to ±500V

 

Engine Log
Engine Hours

 

2 separate engine hour logs internally connected to the tacho Inputs. Hours are logged when RPM is present, stored in non-volatile memory

 

Mechanical
Housing MaterialPolycarbonate
Protective Lid MaterialPolycarbonate
Sealing MaterialsExpanded silicone foam gasket, closed cell polyurethane splash guard and ePTFE waterproof vent
Dimensions127mm (L) x 112mm (W) x 48mm (H)
Weight250g
Mounting

 

4 x 3.5mm lugs to allow panel mount with self tapping s/s screws (included), optional DIN Rail mount available on request

 

Approvals and Certifications
Fully NMEA 2000 Certified
EMCEN 60945 (sections 9 & 10)
Environmental ProtectionIP66 (PCB housing)
Operating Temperature-20°C to +55°C
Storage Temperature-30°C to +70°C
Recommended Humidity0 – 93% RH
Guarantee3 years
  • Enables analogue gauge/sender information to be converted to NMEA 2000® messages
  • Supports up to two engines with a single EMU-1
  • Six gauge/parameter inputs
  • Four alarm inputs
  • Two Tach inputs
  • Supports 12V and 24V systems
  • Bulkhead mount, with optional DIN rail mount kit
  • Total engine hours are logged by the monitoring of engine Tach (RPM) input
  • PC based configuration tool for customised installation
  • Connect signals from fluid level gauges to NMEA 2000®

NETWORK DIAGRAM

Actisense is dedicated to providing up-to-date software and resources for our products. Here are some useful tools and documentation to help you make the most of your product:

FAQ

Here are some Frequently Asked Questions about the EMU-1.

Need more help? Visit our Support Centre.

The EMU-1 has a PC based configuration tool that allows the settings inside the EMU-1 to be changed to best suit the engine it is working with, making it a flexible solution for many engine makes and models. An Actisense PC to NMEA 2000 Gateway (NGT-1) is required to configure the EMU-1.

It is recommended that an NGT-1 is available for every EMU-1 installation. The NGT-1 can be used to update the firmware, connect the Toolkit and display data on a PC for diagnostic and information purposes, using NMEA Reader. Please visit the NGT-1 page for product details.

Ordering Information

(Part number/s)

  • EMU-1

The EMU-1 is available with the SeaTalkNG to NMEA 2000 adaptor Cable – STNG-A06045
The SeaTalk NG to NMEA 2000® adaptor cable (STNG-A06045) is not available as a standalone product and must be bought as part of a bundle.

An optional DIN rail mounting kit is also available. The kit is suitable for use with a top hat rail, type EN 50 022 or a G section rail, type EN 50 035. Please order the DIN rail kit using part number: DIN-KIT-1.

FEATURES

  • Enables analogue signals to be converted to NMEA 2000 messages
  • Convert signals from up to two engines (that share a common ground) with a single EMU-1
  • 6 gauge / parameter inputs
  • 4 alarm inputs
  • 2 additional auxiliary inputs
  • 2 Tacho inputs
  • Customised IP65 case
  • Diagnostic LED’s
  • Wide power compatibility of 9 to 35 Vdc

 

BENEFITS

  • No need to change an existing engine
  • Easy installation
  • Easy to configure to suit the connected engine
  • Connect signals from fluid level gauges (that share a common ground with the engine) to NMEA 2000®
  • Optional DIN rail mounting kit available
  • Total engine hours are logged by the monitoring of engine Tach (RPM) input
Power Supply
Supply Voltage9 to 35V DC
Supply CurrentTypically < 25mA @ 12V DC
Supply ProtectionContinuous reverse polarity protection and load dump protection (meets SAE J1113)
Supply ConnectorPluggable 2-way screw terminal, 3.5mm pitch
Supply Voltage (NMEA 2000 Port)9 to 29V DC
Supply Current (NMEA 2000 Port)< 20mA @ 12V DC from NMEA 2000 bus
Load Equivalent Number (LEN)1
Supply Protection (NMEA 2000 Port)

 

Continuous reverse polarity protection and overvoltage protection to 40V

 

NMEA 2000 Port – In/Out
CompatibilityFully NMEA 2000 certified
Galvanic Isolation2500V input to ground, 1500V output to ground using ISO-Drive
Speed / Baud Rate250kbps
NMEA 2000 Connector

 

M12 male (A coded) connector

 

Gauge Inputs
Voltage Range0 to 35V DC
Input Impedance> 50kΩ
Sender Feed0, 4 or 18mA
Accuracy<= 2%
Input ConnectorPluggable 6-way screw terminal, 3.5mm pitch
Input Protection

 

Overvoltage protection to ±40V

 

Alarm Inputs
Voltage Range0 to 37V DC
Input Impedance> 50kΩ
Threshold VoltageConfigurable, default is 5V
Alarm PolarityConfigurable, default is alarm on low input
Accuracy<= 2%
Input ConnectorPluggable 4-way screw terminal, 3.5mm pitch
Input Protection

 

Overvoltage protection to ±40V

 

Tacho Inputs
Voltage Range±3 to ±60V
Input Impedance> 100kΩ to ground
Input Pulse Range4 to 50,000Hz
Accuracy<= 1%
Sender CompatibilityIgnition coil, alternator (“W”, “R” or “AC”) terminal, hall effect, VR or inductive sender
ThresholdAutomatically adjusts to signal level
Input ConnectorPluggable 4-way screw terminal, 3.5mm pitch
Input Protection

 

Can withstand an ignition pulse to ±500V

 

Engine Log
Engine Hours

 

2 separate engine hour logs internally connected to the tacho Inputs. Hours are logged when RPM is present, stored in non-volatile memory

 

Mechanical
Housing MaterialPolycarbonate
Protective Lid MaterialPolycarbonate
Sealing MaterialsExpanded silicone foam gasket, closed cell polyurethane splash guard and ePTFE waterproof vent
Dimensions127mm (L) x 112mm (W) x 48mm (H)
Weight250g
Mounting

 

4 x 3.5mm lugs to allow panel mount with self tapping s/s screws (included), optional DIN Rail mount available on request

 

Approvals and Certifications
Fully NMEA 2000 Certified
EMCEN 60945 (sections 9 & 10)
Environmental ProtectionIP66 (PCB housing)
Operating Temperature-20°C to +55°C
Storage Temperature-30°C to +70°C
Recommended Humidity0 – 93% RH
Guarantee3 years
  • Enables analogue gauge/sender information to be converted to NMEA 2000® messages
  • Supports up to two engines with a single EMU-1
  • Six gauge/parameter inputs
  • Four alarm inputs
  • Two Tach inputs
  • Supports 12V and 24V systems
  • Bulkhead mount, with optional DIN rail mount kit
  • Total engine hours are logged by the monitoring of engine Tach (RPM) input
  • PC based configuration tool for customised installation
  • Connect signals from fluid level gauges to NMEA 2000®

NETWORK DIAGRAM

Actisense is dedicated to providing up-to-date software and resources for our products. Here are some useful tools and documentation to help you make the most of your product:

FAQ

Here are some Frequently Asked Questions about the EMU-1.

Need more help? Visit our Support Centre.