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EMU-1 - Convert your analog engine data to NMEA 2000. (Please note that an Actisense NGT-1-USB or NGT-1-ISO is required to configure the EMU-1. This is an add-on/option to the order and is not included with the EMU-1)
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 (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.
The two-part screw terminal connection system allows for an easy pluggable connection to an engine wiring harness.
Multiple engines are supported by the setting of the engine instance using the EMU-1 configuration tool. Currently one EMU-1 per engine is supported. Support for multiple engines on a single EMU-1 is currently planned as a future firmware update.
The customised case ensures that the electronics are sealed while allowing quick access to the electrical connections.
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.
It is recommended that an Actisense NGT-1 NMEA 2000 PC Interface is available for every EMU-1 installation as the EMU-1 can not be configured without one. 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.
EMU-1: Specification | |
|---|---|
| Parameter | Description |
|
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. |
| 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 | 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 |
1. Which devices can receive engine data from the EMU-1?
The EMU-1 is compatible with all certified NMEA 2000® devices that can display the PGNs the EMU-1 outputs. Always cross-reference the EMU-1 PGN list with the receive list of your monitoring system, the EMU-1 PGN list is in the manual or in the ‘Which PGNs are supported’ FAQ.
It should work with Raymarine SeaTalkNG devices with a suitable adapter. Other proprietary CAN bus type systems such as SimNet from Simrad are also most likely to work with their appropriate adapter cable.
2. How many inputs does the Engine EMU-1 have?
There are a total of 14 inputs on the EMU-1.
There are six labelled “Gauge” inputs which can be connected to resistive senders or their gauges.
There are four labelled “Alarm” inputs which can be connected to alarm switches or their warning indicators.
There are two labelled “Tacho” inputs which can be connected to alternators or their gauges.
There are two inputs are labelled “Auxiliary” inputs which are not enabled for initial release and are provided for future expansion of the EMU-1’s functionality.
3. What types of inputs does the EMU-1 have?
The EMU-1 has 14 inputs in total; 6 Gauge inputs, 4 Alarm inputs, 2 Tacho inputs and 2 Auxiliary inputs. Please note that the Auxiliary inputs are not enabled for initial release and are provided for future expansion of the EMU-1’s functionality.
4. What are the Gauge inputs for?
“Gauge” inputs are designed to be connected to existing engine senders (resistive type) either with or without the gauge connected. In the case where no gauge is connected the EMU-1 automatically provides a feed to the sender.
The EMU-1 Configuration tool allows senders/gauge types to be selected from a list. The gauges currently supported can be seen in the latest version of the EMU-1 Configuration tool available on the Actisense.com website. Note that the supported gauges will be updated regularly so please check to ensure you have the latest version of the EMU-1 Configuration tool. See http://www.actisense.com/products/nmea-2000/emu1/download-emu-1.html
If you have a gauge which is not supported then please contact support@actisense.com and we can try to assist you as the Actisense team will be updating the Configuration software to support more Gauge inputs and types based on customer feedback and requirements. It is envisaged that this will be done through regular releases during 2013.
5. What are the Alarm inputs for?
The EMU-1 configuration tool allows the alarm active state (i.e. high or low) and the alarm trigger voltage level to be set. The alarms currently supported can be seen in the latest version of the EMU-1 Configuration tool which is available on the Actisense.com website. Note that the supported alarms will be updated regularly so please check to ensure you have the latest version of the EMU-1 Configuration tool. See: http://www.actisense.com/products/nmea-2000/emu1/download-emu-1.html
6. What are the Tacho inputs for?
“Tacho” inputs are designed to measure Tacho signals from either Alternator “W” terminal, inductive sender or ignition coil. The number of pulses per revolution needs to be known and entered into the configuration utility program.
The EMU-1 configuration tool allows the “ratio” to be configured. This ratio is usually referred to as the PPR. (Pulses Per Revolution) It is normally supplied in the engine manual.
For an Alternator “w” connection it can be calculated from:
For an inductive sender it is derived from the number of teeth on the flywheel:
For an ignition coil it can normally be calculated from:
The engine manufacturer will usually be able to supply this ratio so it should not need to be calculated.
The EMU-1 automatically adjusts to the input signal and the sender type does not need to be configured however currently only “W” connection and inductive senders are sensed correctly. (EMU-1 Config tool 1.007)
7. Will the EMU-1 have a list of supported gauges and senders?
The gauges currently supported can be seen in the latest version of the EMU-1 Configuration tool available on the Actisense.com website. Note that the supported gauges will be updated regularly so please check to ensure you have the latest version of the EMU-1 Configuration tool. See http://www.actisense.com/products/nmea-2000/emu1/download-emu-1.html
If you have a gauge which is not supported then please contact support@actisense.com and we can try to assist you as the Actisense team will be updating the Configuration software to support more Gauge inputs and types based on customer feedback and requirements. It is envisaged that this will be done through regular releases during 2013.
The option to calibrate the EMU-1 to match other senders / gauges will be made possible at a later date.
Gauges supported at present are:
- Engine Oil Pressure
- Engine Coolant Pressure
- Trans. Oil Pressure
- Engine Temp.
- Engine Oil Temp.
- Trans. Oil Temp.
8. Which engines will the EMU-1 work with?
Actisense are building up a database of various engines and corresponding senders/gauges. As there are likely to be many permutations, the database is expected to continue to grow as feedback is received from customers.
Knowing the engine type is currently not sufficient to configure the EMU-1; understanding the manufacturer and type of each sender / gauge is required to configure the EMU-1.
9. How do I configure the EMU-1?
The EMU-1 Config Tool must be used to configure an EMU-1.
This tool requires a NGT-1 for configuring the EMU-1 directly on the NMEA 2000 bus. The NGT-1 connects a PC to a NMEA 2000 bus.
The tool itself is simple to use:
- The EMU-1 device to be configured is selected from a drop down list.
- The engine instance is selected.
- The input voltage monitor destination is selected.
- The parameter / gauge type is then selected for each gauge input.
- The alarm state and level is then selected for each alarm input.
- The tacho PPR ratio is entered.
- The Config settings are sent to the EMU-1 by pressing “Send to EMU”
Please ensure that the latest version of this configuration tool is used as it will be updated regularly. The latest version can always be downloaded from our website http://www.actisense.com/products/nmea-2000/emu1/download-emu-1.html
In the future Actisense plans to have all configuration and Firmware updating via the next generation NMEA Reader program.
10. Can I request what I would like the EMU-1 to support?
The Actisense team are working on customer requests for what is supported. If you would like to make a request, please contact Actisense Support. Your requests will be added to the ‘Requests List’ which will be used to prioritise additional features.
11. How many engines can a single EMU-1 support?
In the future, two engine instances will be supported by a single EMU-1. The initial release of the EMU-1 will be limited to supporting one engine instance. For installations with more than one engine a dedicated EMU-1 for each engine will be required.
12. Does the EMU-1 come with a cable harness?
The EMU-1 is supplied without a cable harness. There are pluggable screw terminals on the unit to allow easy connection to senders or the existing gauges.
13. Which PGN's are supported?
14. Why do I need an Actisense NGT-1 NMEA 2000 PC Interface on the bus?
A software tool called the EMU-1 Config Tool which a technician can run on a PC is available to set up the configuration of the various inputs. The configuration tool talks to the EMU-1 via the NMEA 2000 bus, so 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 the Actisense NMEA Reader software utility.
The NGT-1 does not need to be connected to the NMEA 2000 bus permanently; once the EMU-1 is configured it can be removed. The installation technician should at least have a NGT-1 in order to configure the EMU-1 upon installation.
15. What are the EMU-1 mounting options?
A DIN rail mounting kit is available to order from Actisense. The kit is not supplied with the EMU-1. The kit is suitable for use with top hat rail, type EN 50 022 or G section rail, type EN 50 035. The kit can be ordered using part number: DIN-KIT-1.
The EMU-1 can also be mounted on the bulkhead. Four M4 stainless steel pan-head screws are provided with the EMU-1 for mounting to the bulkhead.
16. How do I reload the firmware on an EMU-1 using ActiPatch beta (V1.003)?
Note: Please ensure you have a NGT-1-USB with the latest firmware (V2.210 or above) connected to both your PC and the same NMEA 2000 bus that the EMU-1 to be updated is on. Please ensure that NMEA Reader has not opened the COM port of the same NGT-1.
Run ActiPatch and you should see a drop down list called 'Device' where you can find the EMU-1 to be reprogrammed (it will appear something like this “nnn Actisense Engine Gateway (SID xxxxx), Propulsion systems” see screenshot below…Select the EMU-1 to be re-programmed in the dropdown list.
From the ActiPatch ‘File->Open’ menu, select the required EMU-1 firmware file. The file is easily identified as it will have a .actp extension. The Config tool should default to the correct directory otherwise it can be found in the EMU-1 directory where ActiPatch was installed (by default “C:\Program Files (x86)\Actisense\Actisense ActiPatch\EMU-1”).
Click on 'Connect' – The log window should now say "connected".
The blue Power LED on the EMU-1 should now be flashing faster (5 times per second) to indicate that the EMU-1 is in Boot loader mode. The Tx and Rx LED’s should be pulsing about twice per second. (If there is another EMU-1 on the bus then the Rx LED will be flashing faster reflecting the increased NMEA 2000 data on the bus).
Click on 'Program' – You should see a message nnnnnn: Erasing started... The progress bar will indicate progress then you should see Erase complete The Tx and Rx LED’s on the EMU-1 should be flashing very fast.
It will then automatically go through the next steps: Writing started Writing has completed The progress bar will again show progress.
Eventually it will show CRC passed Programming completed successfully the progress bar will now indicate the end of the process.
The following screenshot shows an example of what you should see…….
Click on Disconnect – The EMU-1 will now reboot and run the new firmware.
Close Actipatch
17. Can I connect an EMU-1 to Dual Station senders?
Yes the EMU-1 is compatible with both single and dual station senders. Note that the EMU-1 is designed with high impedance inputs so it does not replace existing gauges w.r.t. its resistive load. i.e. A normal dual station installation will have a dual station sender and two gauges.
The EMU-1 connects in parallel to these existing dual gauges, not in place of one of them.
18. What is the temperature range an EMU-1 gauge input can be used to measure?
This depends on what gauge is selected in the configuration tool. From EMU Config Tool v1.007 onwards, most gauge selections allow temperatures to be measured outside of the normal range of the gauge. i.e. selecting a '40 to 120 degrees C' gauge for an input can actually allow the EMU-1 to report temperatures all the way down to and below 0 degrees C. This is because the particular calibration curve of the sender / gauge extends beyond the gauge display. Usually the accuracy of the calibration outside of the normal range is however compromised.20. What baud rate should my NGT-1 be set to?
19. Should the EMU-1 to be powered from the same power supply as the gauges it is measuring?
Yes, it is very important that the EMU-1 is powered from the same power supply as the gauges or else this may result in the measurements not being accurate. The EMU-1 gauge ground and the EMU-1 power ground must be common to prevent ground loops.
20. What baud rate should my NGT-1 be set to?
The NGT-1 should be configured to use 115200 baud on an NMEA 2000 network with a bus load below 50%. For higher bus loads the NGT-1 must be configured to 230400 baud.
21. Is the engine hour log stored in non-volatile memory?
The answer to this is based on the version of firmware which you have in your EMU-1. In version 0.022 and below the Engine hour log is unfortunately reset every time the EMU-1 is power cycled. From version 0.03 onwards this is stored in non-volatile memory.
22. Can I custom configure the EMU-1?
The current version of the configuration tool (V1.007) does not allow this.
In future the EMU-1 configuration Tool will have the ability to enter calibration readings for various gauges and senders. This requires a technician to take readings of the gauges using a multi-meter and then enter this corresponding data into the configuration program. This will allow for any analogue gauge to be catered for if the installer fills in the voltmeter readings vs. observed parameter on the existing gauge.
23. What parameters will the future Software or Configuration updates support?
It is expected that the following parameters are to be supported via Software updates;
- Turbo Boost: PGN 127488
- Trim: PGN 127489
- Fluid level: PGN 127505
