Actisense

Actisense Engine Monitoring Unit, Analogue to NMEA 2000, standard configuration

£512.22
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EMU-1
Analogue to NMEA 2000 engine monitoring unit that digitises analogue engine gauges and senders for display on any NMEA 2000 network. Six gauge, four alarm and two tacho inputs monitor up to two engines, with PC configuration and a sealed IP66 case.

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Pickup available at Mercury Yacht Harbour

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Description

The Actisense EMU-1 is a specialised analogue-to-NMEA 2000 gateway that digitises the output of traditional analogue engine gauges and senders, letting any NMEA 2000 display monitor the engines on a vessel. It reads a wide range of parameters and shares them across the network, so you can add modern engine monitoring without replacing existing analogue instrumentation.

Each EMU-1 provides six gauge inputs, four alarm inputs, two tacho inputs and two user-definable auxiliary inputs, and can monitor two engines that share a common ground where each has three or fewer gauges. The same inputs can instead read fluid levels in up to six tanks, with a configurable instance identifying each tank, and the built-in engine-hours log records running time from the tacho inputs into non-volatile memory. A PC-based configuration tool tailors the unit to the specific engine it is working with, giving a flexible solution across many makes and models.

Housed in a sealed polycarbonate case rated to IP66 with expanded silicone foam gaskets and a waterproof vent, the EMU-1 is fully NMEA 2000 certified, connects via an M12 male backbone connector and mounts to a bulkhead, with an optional DIN rail kit available.

PRODUCT DETAILS

  • Converts analogue engine gauge and sender signals to NMEA 2000 messages
  • Six gauge, four alarm, two tacho and two auxiliary inputs
  • Monitors up to two engines sharing a common ground with one unit
  • Can instead read fluid levels in up to six tanks with configurable instances
  • Logs engine hours from tacho inputs into non-volatile memory
  • PC-based configuration tool suits many engine makes and models
  • Fully NMEA 2000 certified with M12 male backbone connector
  • Sealed polycarbonate case rated to IP66
  • EMU-1 Engine Monitoring Unit
  • Pluggable screw terminal connectors
  • Self-tapping stainless steel mounting screws
  • Quick start guide

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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 Equivalency Number (LEN)1
Supply Protection (NMEA 2000 Port)Continuous reverse polarity protection

NMEA 2000 Port

CompatibilityFully NMEA 2000 certified
Speed / Baud Rate250kbps
NMEA 2000 ConnectorM12 Male (A coded) connector

Gauge Inputs

Voltage Range0 to 35V DC
Input Impedance> 50kΩ
Sender Current Feed0, 4 or 18mA
Accuracy<= 2%
Input ConnectorPluggable 6-way screw terminal, 3.5mm pitch
Input ProtectionOvervoltage 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 ProtectionOvervoltage protection to ±40V

Tacho Inputs

Voltage Range±3 to ±60V
Input Impedance> 100kΩ to ground
Input Pulse Range4 to 30,000Hz
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 ProtectionCan withstand an ignition pulse to ±500V

Engine Log

Engine Hours2 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 106mm (W) x 48mm (H)
Weight250g
Mounting4 x 3.5mm lugs to allow panel mount with self-tapping s/s screws (included), optional DIN rail mount (DIN-KIT-1)

Approvals & Environmental

CertificationFully NMEA 2000 Certified
EMCEN 60945 (sections 9 & 10)
Environmental ProtectionIP65 (PCB housing)
Operating Temperature-20°C to +55°C
Storage Temperature-30°C to +70°C
Recommended Humidity0 - 93% RH
Guarantee3 years (5 years if registered)
Can one EMU-1 monitor two engines?
Yes, provided the two engines share a common ground and each has three or fewer gauges to monitor. Where each engine has more than three gauges, a separate EMU-1 is required per engine.
Do I have to replace my existing analogue gauges?
No. The EMU-1 reads the output of your existing analogue senders and gauges and digitises it for the NMEA 2000 network, so there is no need to change the engine or its instrumentation.
How is the EMU-1 set up for a particular engine?
The EMU-1 has a free PC-based configuration tool that lets you adjust its settings to match the engine it is connected to, making it a flexible solution for many different engine makes and models.
What do I need to configure the EMU-1?
An Actisense NGX-1 NMEA 2000 PC interface is required to connect the PC-based configuration tool to the EMU-1. Earlier Actisense documentation also lists the NGT-1 (USB or ISO variant) for this purpose.
Can the EMU-1 monitor tank levels?
Yes. The EMU-1 can monitor fluid levels in up to six tanks, with a configurable instance for each tank so you can identify which tank the data is coming from. Fluid level gauges must share a common ground with the engine.