Actisense EMU-1 Engine Monitoring Unit

Share engine information on the NMEA 2000 bus.

The Actisense EMU-1 Engine Monitoring Unit 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 one or two engines 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 (e.g. Temperature,
pressure and RPM) into NMEA 2000 engine PGNs, the EMU-1 simplifies
processes and reduces the number of input/output wires required at
each engine. Additionally, the EMU-1 also supports the conversion
of analogue transmission parameters and battery status to the
associated NMEA 2000 PGN’s.

Actisense EMU-1 can monitor two engines where each
engine has three (or less) gauges that require monitoring. Where
dual engines have more than three gauges each to monitor, multiple
EMU-1 units are required. Alternatively, the EMU-1 can be used to
monitor fluid levels in up to six tanks at any one time. The
addition of a configurable ‘instance’ for each tank allows the user
to identify which tank the data is coming from.

Actisense EMU-1 Engine Monitoring Unit
Features:

• 6 gauge inputs
• 4 alarm inputs
• 2 tacho inputs
• Dual engine support (with a common ground)
• Logs total engine time using the tacho inputs
• Simple single wire gauge connections; common ground referenced
  design
• Manual measurements are not required to configure
• Firmware and configuration can be modified remotely over the
  NMEA 2000 network to suit different installations (requires an
  NGT-1 and PC software)
• Waterproof electronics and splash-proof connections
• Pluggable connectors for quick and easy installation
• Optional DIN rail mounting kit available

Actisense EMU-1 Engine Monitoring Unit
Specifications:

Parameter	Description
Power Supply
Supply Voltage	9 to 35V DC
Supply Current	Typically <25mA @ 12V DC
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	>50kOhm
Sender Feed	0, 4 or 18mA
Accuracy	<=2%
Input Connector	Pluggable 6-way screw terminal, 3.5mm pitch
Input Protection	Overvoltage protection to plus or minus 40V
Alarm Inputs
Voltage Range	0 to 37V DC
Input Impedance	>50kOhm
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	plus or minus 3 to plus or minus 60V
Input Impedance	>100KOhms to ground
Input Pulse Range	4 to 50,000Hz
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 plus or minus 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 water proof 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
NMEA 2000	Full NMEA 2000 approval pending
EMC	IEC 60945 (sections 9 and 10)
Environmental Protection	IP66
Operating Temperature	-20 degreesC to + 55 degreesC
Storage Temperature	-30 degreesC to + 70 degreesC
Relative Humidity	0 to 93% RH
Guarantee	3 years

Actisense EMU-1 Engine Monitoring Unit Manual