![Actisense NMEA 2000 Engine Monitoring Unit - Analog to NMEA2000 Engine Gateway [EMU-1-BAS]](https://cdn.shopify.com/s/files/1/2785/3654/products/51787XL.jpg?v=1677942021)
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Description
Actisense NMEA 2000 Engine Monitoring Unit - Analog to NMEA2000 Engine Gateway [EMU-1-BAS]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.
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
Specifications:
- Data Interface: NMEA 2000
- Box Dimensions: 3"H x 6"W x 9"L WT: 1 lbs
- UPC: 5060998710331
Owner's Manual (pdf)
Brochure (pdf)
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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Product Reviews
★★★★★ 5
A great lightweight hoodie.
Color: Light Dark Blue Grid, Size: X-Large
Another excellent M MAELREG product. I already have some pants and jackets from M MAELREG and figured this hoodie would be great as well and I was right. It is lightweight and very comfortable while also being warm. The material is smooth and soft to the touch with a stylish look to it that would work in tthe gym, on the golf course, or out about town. I really love the hood design, not having a single hem down the center lets the hood rest more naturally on your head. It fits as expected, I would prefer it to be a couple inches longer, but that's just my personal taste. Overall, this is an excellent lightweight hoodie.
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Reviewed in the United States on May 18, 2026
★★★★★ 5
Nice hoodie, very comfortable
Color: Misty Blue, Size: Medium
This hoodie feels lightweight and breathable which makes it good for golf, workouts, or just casual everyday wear. The fabric has a soft athletic feel and stretches enough to stay comfortable while moving around. It’s lighter than a standard sweatshirt, so it works better for layering or mild weather.
I liked that it didn’t feel bulky while still giving some warmth during cooler mornings. The hood lays nicely and the material dries fairly quickly if you sweat in it. It also has a cleaner athletic look that pairs well with joggers, shorts, or golf pants without looking sloppy.
One thing to note is it’s thinner than some people may expect from a hoodie, so it won’t replace a heavy sweatshirt in colder weather. The fit also runs slightly slim depending on build. Still, for sports, travel, or casual wear, it’s comfortable and easy to throw on without feeling heavy.
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Reviewed in the United States on May 11, 2026
★★★★★ 4
Great lightweight fabric, good design
Color: Grey Green, Size: Small, Color: Grey Green, Size: Small
This hoodie is a great athletic top. The size small fits my husband well, although it's a little loose in the arms. So if you have a leaner figure, you may find it a bit baggy. But the fabric is fantastic, a high-quality performance fabric that seems breathable and the UV protection is a great bonus. The sleeves are long enough to make good use of the thumb holes in cooler weather, and the color is a nice neutral, gray-green.
For reference, the size small has a chest of about 42" (measured just under the sleeves) and a center back length of approx. 25".
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Reviewed in the United States on April 5, 2026
★★★★★ 5
Great Quality and Look
Color: Grey Green, Size: Medium
21st century materials are here to save us! :) M Maelreg does a great job utilizing those materials to the best of their ability. I've really become a fan of just about anything that they make, and this shirt is no exception. It's made from the very popular 88/12 Poly/spandex blend that has become ubiquitous in the fitness/active industry because of its amazing tensile characteristics- wicking, quick dry, UPF, and extra comfy against the skin. You get all of that here and a no-frills, really beautiful color to go along with a fit that is exactly true to size. I took the more form-fitting version for my 5'10" 175 lb. frame (I've found both L and M work from these guys, M for a more tailored look) and it's exactly right- enough room to move around comfortably and breathe, not so tight that it's hugging my belly. It's super lightweight and really easy to launder (I hang dry mine to prevent pilling and wrinkles), cold/low and a medium/low heat iron to rid those stubborn factory wrinkles and you shouldn't ever need to iron it again. Another great offering from the folks at Maelreg.
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Reviewed in the United States on April 15, 2026
★★★★★ 5
Just like the big brands!
Color: Light Dark Blue Grid, Size: 3X-Large
This hoodie is very good quality. I would say it compares to many of the Columbia or Northface type. The only problem that I encountered was that the sleeves are very long, but that might be a me problem because I am pretty short. The hoodie is very lightweight so it can even be worn on semi warm days and really is mostly used as a form of sunblock.
I feel like the sizing is very true to size and if anything there’s a little extra room. The price is just right since it’s much less expensive than the big brands and it holds up after being washed several times. It’s very comfortable and breathes very nicely as well.
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Reviewed in the United States on April 27, 2026