EMU-1-BAS - Actisense NMEA 2000 Engine Monitoring Unit - Analog to NMEA2000 Engine Gateway

NMEA 2000 Engine Monitoring Unit - Analog to NMEA2000 Engine Gateway

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 digitizes 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.

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 (NGX-1/NGT-1) is required to configure the EMU-1.

The NGX-1 or NGT-1 must 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 NGX-1 page and/or NGT-1 page for product details.

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
• Customized IP65 case
• Diagnostic LED’s
• Wide power compatibility of 9 to 35VDC
• 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

Technical Specifications:

Power Supply

• Supply Voltage - 9 to 35VDC
• Supply Current - Typically < 25mA @ 12VDC
• 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 29VDC
• Supply Current (NMEA 2000 Port) - < 20mA @ 12VDC 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

• Compatibility - Fully NMEA 2000 certified
• Galvanic Isolation - 2500V input to ground, 1500V output to ground using ISO-Drive
• Speed / Baud Rate - 250kbps
• NMEA 2000 Connector - M12 male (A coded) connector

Gauge Inputs

• Voltage Range - 0 to 35VDC
• Input Impedance - > 50kΩ
• Sender Feed - 0, 4 or 18mA
• Accuracy - <= 2%
• Input Connector - Pluggable 6-way screw terminal, 3.5mm pitch
• Input Protection - Overvoltage protection to ±40V

Alarm Inputs

• Voltage Range - 0 to 37VDC
• Input Impedance - > 50kΩ
• Threshold Voltage - Configurable, default is 5V
• Alarm Polarity - Configurable, 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 - ±3 to ±60V
• Input Impedance - > 100kΩ to ground
• Input Pulse Range - 4 to 50,000Hz
• Accuracy - <= 1%
• Sender Compatibility - Ignition coil, alternator (“W”, “R” or “AC”) terminal, 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 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 Material - Polycarbonate
• Protective Lid Material - Polycarbonate
• Sealing Materials - Expanded silicone foam gasket, closed cell polyurethane splash guard and ePTFE waterproof vent
• Dimensions - 127mm (L) x 112mm (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

• EMC - EN 60945 (sections 9 & 10)
• Environmental Protection - IP66 (PCB housing)
• Operating Temperature - -20°C to +55°C
• Storage Temperature - -30°C to +70°C
• Recommended Humidity - 0 – 93% RH
• Guarantee - 3 years

The Actisense NMEA 2000 Engine Monitoring Unit (EMU-1-BAS) is an analog-to-NMEA 2000 gateway designed for integrating engine data onto a vessel's NMEA 2000 network. This unit converts signals from traditional analog engine gauges and senders into NMEA 2000 digital data, enabling compatible display devices to monitor engine parameters. It supports up to two engines that share a common ground, providing inputs for six gauge parameters, four alarm inputs, two auxiliary inputs, and two tacho inputs. The EMU-1-BAS addresses the challenge of sharing legacy engine information with modern NMEA 2000 systems without requiring extensive modifications to existing engine setups. Configuration is performed via a PC-based tool, necessitating an Actisense PC to NMEA 2000 Gateway (NGX-1/NGT-1) for setup, firmware updates, and diagnostics. This solution is suitable for IT professionals and marine technicians managing vessel systems that require integration of analog engine data into a standardized digital network.