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The EMU-1 converts data from analogue engine sensors into NMEA 2000.

The Actisense EMU-1 is a specialised analogue to NMEA 2000 Gateway which converts data from analogue engine senders into NMEA 2000. The EMU-1 enables NMEA 2000 display devices to monitor the engine on a vessel.

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. Capable of measuring a wide range of engine parameters, the EMU-1 reports how the engine is operating and shares the information across the network.

Designed to simplify the conversion of analogue engine parameters (Tach, temperature, pressure and RPM) into NMEA 2000 engine parameter PGNs, the EMU-1  simplifies processes and reduces the number of input/output wires required at each engine.   

The two-part screw terminal system allows easy connection to an engine wiring harness and a quick 'plug and release' from the EMU-1 terminal strip.

For a dual engine installation one EMU-1 can be used if the engines share common ground

The customised case ensure that the electronics are sealed while allowing quick access to the electrical connections.   

It is recommended that an Actisense NGT-1 NMEA 2000 PC Interface is available for every EMU-1 installation. The NGT-1 can be used to update the Firmware, connect the Configuration Tool and display data on a PC for diagnostic and information purposes, using NMEA Reader. Please visit the NGT-1 page for product details.

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.

Example Configuration

emu 1 legends


Power Supply

Supply Voltage 9 to 35V DC
Supply Current 25mA @ 12V DC in idle mode
Supply Protection Continuous reverse polarity protection and load dump protection (meets SAE J1113)
Supply Connector Pluggable 2-way screw terminal, 3.5mm pitch
Supply Voltage (NMEA 2000 port) 9 to 35V DC
Supply Current (NMEA 2000 port) 20mA @ 12V DC from NMEA 2000 bus
Load Equivalence Number (NMEA 2000 port) 1 LEN
Supply Protection (NMEA 2000 port) Continuous reverse polarity protection and overvoltage protection to 40V
NMEA 2000 Port - in/out  
Compatibility Fully NMEA 2000 compatible
Galvanic Isolation 2500V input to ground
Speed/Baud Rate 250kbps
NMEA 2000 Connector M12 male (A coded) connector
Gauge Inputs  
Voltage Range 0 to 35V DC
Input Impedance >50kOhms
Sender Feed 0mA, 4mA or 18mA programmable
Accuracy <=2%
Input Connector Pluggable 6-way screw terminal, 3.5mm pitch
Input Protection Overvoltage protection to +/-40V
Alarm Inputs  
Voltage Range 0 to 37V DC
Input Impedance >50kOhms
Threshold Voltage Programmable, default is 0.5 of supply voltage
Alarm Polarity Programmable, default is alarm on low input
Accuracy <=2%
Input Connector Pluggable 4-way screw terminal, 3.5mm pitch
Input Protection Overvoltage protection to =/-40V
Tacho Inputs  
Voltage Range 0 to +/-60V
Input Impedance >100KOhms to ground
RPM Range  10 to 16,000 RPM
Accuracy <=1%
Sender Compatibilty Ignition coil, alternator W connection, Hall effect, VR or inductive sender
Threshold Automatically adjusts to signal level
Input Connector Pluggable 4-way screw terminal, 3.5mm pitch
Input Protection Can withstand 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.
Housing Material Polycarbonate
Protective Lid Material Polycarbonate
Sealing Materials Expanded silicone foam gasket, closed cell polyurethane splash guard and ePTFE water proof vent
Dimensions 128mm (L) x 120mm (W) x 48mm (H)
Weight 250g
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  
NMEA 2000® Full NMEA 2000® approval pending
EMC IEC 60945-9,10,12
Environmental Protection IP66
Operating Temperature -20°C to + 70°C
Storage Temperature -40°C to + 85°C
Relative Humidity 0 to 80% RH
Guarantee 3 years


A product sheet can be downloaded here

Product sheet


Marinplus AB/Odelco AB
Missionsvägen 77
SE-167 33 BROMMA


+46 8 718 03 00


Marinplus AB has merged with Odelco AB, thereby becoming the first and only distributor that can offer a complete range of products and solutions for power supply, modern electrical systems, rescue and security systems.


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