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--- ve.can:nmea-2000:start [2020-01-07 09:38] – [Q3: What about terminators and network layout?] mvader
+++ ve.can:nmea-2000:start [2025-07-19 07:29] (current) – [3.2 NMEA 2000 instances] mvader
@@ Line 1: / Line 1: @@
-====== NMEA 2000 & MFD integration guide ======
+====== Marine Integration Guide ======
 ===== 1. Introduction =====
-This technical document explains how to integrate a Victron system onto a Marine MFD, such as those from Garmin, Raymarine Navico and other brands.
+==== 1.1 Summary ====
-There are multiple ways to integrate, so make sure to closely read the complete introductory chapter to find the best method for your type of system.
+This guide provides an overview of integrating Victron systems with marine networks. These features include:
-=== Systems with a GX Device ===
+  * **MFD (Chart Plotter) Monitoring**: Compatible with Garmin, Raymarine, Furuno, Q Display, and the Navico brands B&G, Simrad, and Lowrance.
+  * **Tank Level Monitoring**: Seamlessly integrate tank level data between the NMEA 2000 network, Victron GX devices and the VRM Portal.
+  * **NMEA2000-out feature**: Share tank data, as well as other data such as Battery, DC & AC system data from GX devices to the NMEA 2000 network.
+  * **GPS Integration**: GX devices can read GPS data (e.g., location, speed) from NMEA 2000 but do not output GPS data to the network.
+  * **Advanced features powered by Signal K**: Includes wireless AIS, anchor alarms, and automatic trip logging.
-For most installations and integrations, it will be best to use one of our [[venus-os:start|GX Products]]. It acts as a hub, collecting information from connected equipment, such as Inverters, Battery Monitors and Chargers; and then making them available to the MFD.
+This document serves as a high-level overview with links to relevant manuals for detailed setup instructions.
-A GX Device can be connected to a Marine MFD in two ways: the simple plug and play like method uses an Ethernet connection, which enables the MFD App. Available for [[https://www.victronenergy.nl/panel-systems-remote-monitoring/marine%20mfd%20gx%20integration%20-%20raymarine|Raymarine]], [[https://www.victronenergy.nl/panel-systems-remote-monitoring/marine%20mfd%20gx%20integration%20-%20garmin|Garmin]], as well as the [[https://www.victronenergy.nl/panel-systems-remote-monitoring/marine%20mfd%20gx%20integration|Navico brands B&G, Lowrance and Simrad]]. Click those links to go straight to all information, videos and manuals.
+==== 1.2 MFD Integration ====
-The other type of integration is to connect the GX Device to the NMEA2000 network. See the [[https://www.victronenergy.com/live/ccgx:start#marine_mfd_integration_by_nmea2000|NMEA 2000 chapter in the CCGX manual]] for details.
+Integration with MFDs depends on customer requirements and equipment used. A GX device (e.g., Cerbo GX or Ekrano GX) is typically involved, with two main options:
-Both connections can be made and used at the same time, and each has its advantages and disadvantages. The MFD App is by far the simplest method. It presents an easy to use system overview without requiring any configuration. The NMEA 2000 integration on the other hand, whilst being more complex, allows more customisation on the MFD: the data will show up in the data-tree of the MFD, and most MFDs then allow the user to configure various pages and combinations of information. This is not so with the MFD App, as the only available settings are to show or hide battery parameters (Voltage, SOC, Current) as well as naming the batteries.
+  - **NMEA 2000 Integration**: Connect the GX device directly to the NMEA 2000 network.
+  - **HTML5 App Integration**: Connect the GX device and MFD via Ethernet to enable Garmin OneHelm or Raymarine LightHouse Apps.
-Note that, besides making information available on NMEA 2000, a GX Device can also tank level data from NMEA 2000. More information in [[https://www.victronenergy.com/live/ccgx:start#connecting_nmea-2000_tank_senders|the NMEA 2000 tank sender section in the CCGX Manual]].
+**Comparison of Options:**
-=== Direct connection - products with a VE.Can port only ===
+  - **NMEA 2000**: Offers customizable data pages on the MFD but requires more configuration.
+  - **HTML5 App**: Plug-and-play with an auto-configured system overview but less customizable.
-Some of our products feature a VE.Can port; and can thus be directly connected to the NMEA 2000 network. No electronic converter necessary; only a plug conversion cable, the [[https://nocache.victronenergy.com/accessories/ve-can-to-nmea2000-micro-c-male|VE.Can to NMEA2000 cable]].
+**Illustration**:
-=== Using our converter interfaces (deprecated) ===
+{{ :ve.can:nmea-2000:garmin_mfd_complex_system_horisontal_split.png?direct&800 |}}
-  * [[https://www.victronenergy.com/accessories/ve-bus-to-nmea2000-interface|VE.Bus to NMEA 2000 interface]]
+  * Right bar: NMEA 2000 data.
-  * [[https://www.victronenergy.com/accessories/ve-direct-to-nmea2000-interface|VE.Direct to NMEA 2000 interface]], for BMV Battery Monitors (only).
+  * Bottom: HTML5 App integration.
-Note that the use of both those interfaces is deprecated. Use a GX Device instead.
+=== Further reading by brand ===
-=== What is NMEA 2000? ===
+  * [[https://www.victronenergy.com/media/pg/Cerbo_GX/en/marine-mfd-integration-by-app.html#UUID-d5fa693e-1c4b-ec20-be20-e0baf8803e6e|Garmin integration details]]
+  * [[https://www.victronenergy.com/media/pg/Cerbo_GX/en/marine-mfd-integration-by-app.html#UUID-906e773b-f29c-2b77-56a8-d9ade87cc418|Raymarine integration details]]
+  * [[https://www.victronenergy.com/media/pg/Cerbo_GX/en/marine-mfd-integration-by-app.html#UUID-0e93850d-da2f-8bd9-9ce6-cc2546605459|Furuno integration details]]
+  * [[https://www.victronenergy.com/media/pg/Cerbo_GX/en/marine-mfd-integration-by-app.html#UUID-d5fa693e-1c4b-ec20-be20-e0baf8803e6e|Navico integration details]]
-NMEA 2000 is is a plug-and-play communications standard used for connecting marine sensors and display units within ships and boats.
+==== 1.3 Tank monitoring ====
-Victron Energy is a member of the NMEA 2000 organisation, and we have several of our products certified by NMEA 2000.
+The Victron GX devices offer a user-friendly **Tank Level Page** to centralize and visualize data, as well as integration with MFDs and the NMEA 2000 network.
-For brevity, this document will refer to NMEA 2000 as N2K.
+**Key Features:**
+  * Monitor tank levels on the GX device and VRM Portal.
+  * Access NMEA 2000 tank data or share GX tank data with NMEA 2000.
+  * Customize tank naming, shapes, and damping for accurate readings.
+  * Expand capabilities with the [[https://www.victronenergy.com/accessories/gx-tank-140|GX Tank 140]] module for voltage (0-10V) or current (4-20mA) inputs.
-=== Modbus-TCP Integration ===
+**Visual Examples:**
-For larger vessels, using custom designed SCADA systems, the recommended protocol to use is ModbusTCP. See our [[ccgx:modbustcp_faq|]].
+{{ :ve.can:nmea-2000:brief_page_tanks.png?direct |}}
-===== 2. Varia =====
+{{ :ve.can:nmea-2000:tank_grouping.png?direct |}}
+{{ :ve.can:nmea-2000:vrm_tanks.png?direct&800 |}}
-==== 2.1 VE.Can products (Skylla-i, Skylla-IP44, Lynx Shunt, Lynx Ion+Shunt and more) ====
+** Video that demonstrates the tank page on the GX**
-Since the Victron VE.Can communication protocol is based on N2K, the following products can all be connected directly to a N2K network. The only thing necessary is a plug converter: the [[https://www.victronenergy.com/cables/ve-can-to-nmea2000-cable|VE.Can to NMEA 2000 cable]].
+ {{youtube>lwFUtSZFEz4?large}}
-  * Skylla-i 24V Battery Chargers
-  * Skylla IP44 Battery Chargers
-  * Lynx Shunt Battery Monitors
-  * Lynx Ion + Shunt all models
-  * SmartSolar MPPT Solar Chargers with VE.Can communications port
-{{ :ve.can:nmea-2000:schema_nmea2000-vecan_mppt-skylla_nov_2016.png?nolink&700 |}}
+=== Further details ===
+  * **Resistive tank level inputs built-in to the Cerbo GX and Ekrano GX:** See [[https://www.victronenergy.com/live/venus-os:start:the GX product page]] for details on the built-in tank inputs.
+  * **Reading data from NMEA 2000 Tank senders into the GX Device and VRM Portal:** The GX device can read tank level data from compatible sensors on the NMEA 2000 network. This information is then displayed on the GX interface, including the dedicated tank level page, and synced with the VRM Portal. For compatibility details, see [[https://www.victronenergy.com/media/pg/Cerbo_GX/en/connecting-supported-non-victron-products.html#UUID-9f759229-3e91-5a02-891c-2206c9625753|the 3rd party NMEA 2000 tank sender section in a GX manual]].
+  * **Transmitting GX tank levels to the NMEA 2000 network:** For vessels with advanced monitoring setups, the GX device can also send tank data back to the NMEA 2000 network, enabling MFDs and other connected devices to access and display the information. For further information, see the [[https://www.victronenergy.com/media/pg/Cerbo_GX/en/marine-mfd-integration-by-nmea-2000.html|MFD integration by NMEA 2000 chapter in the GX manual]]. Note that the manual includes specifics steps for Garmin, Raymarine, Furuno and Navico systems.
+==== 1.4 NMEA2000-out feature ====
-==== 2.1 Raymarine & EmpirBus ====
+Victron Energy GX devices feature an NMEA 2000-out function: when enabled, the GX device acts as a bridge: it makes the data of all connected Battery monitors, Inverter/chargers, as well as other products connected to the GX device, available on the NMEA 2000 network.
-Besides using NMEA 2000 and/or the Lighthouse App, integration onto Raymarine MFDs can also be done with an [[http://www.trigentic.com/#nxt-mcu|Empirbus NXT MCU ]]. Though both are connected to the same N2K network, the NXT MCU translates the N2K PGNs originating from the Victron equipment into Raymarine proprietary messages.
+Using that feature, and having the GX device connected a NMEA 2000 network, Marine MFDs can read this data and visualise it to the user. Often in a highly configurable manner.
-In the [[http://www.empirbus.com/clickOnce/EmpirBusStudio-Demo/|EmpirBus Studio software]] you will find dedicated Victron building blocks than can be drawn onto the diagram.
-Next, use the [[http://www.trigentic.com/#empirbus-graphic|EmpirBus Graphical tool]] to design the pages for on the Raymarine MFDs.
+==== 1.5 Advanced features powered by Signal K ====
-The EmpirBus system requires the data instance of battery status and dc detailed status to be unique when using multiple sources. ([[ve.can:changing_nmea2000_instances#changing_a_data_instance|how to change data instances]])
+Signal K unlocks powerful features:
-{{ :ve.can:nmea-2000:schema_nmea2000-raymarine_ccgx_nov_2016.png?nolink&900 |}}
+  * **Wireless AIS & Navigation Data**: Share NMEA 2000 data via WiFi for apps like Navionics.
+  * **Anchor Alarm**: Reliable and easy-to-use alarm.
+  * **Automatic Logbook**: Track journeys effortlessly.
-==== 2.2 Maretron ====
+More details:
+  - [[https://www.victronenergy.com/live/venus-os:large#signal_k|Venus OS Large manual]].
+  - [[https://svrenaissance.com/victron-cerbo-gx-on-steroids/|Victron Cerbo GX on steroids blog post]].
-All data sent out by Victron devices can be picked up by the Maretron MFDs & software. See the [[http://www.maretron.com/products/N2KView.php|Maretron N2KView® vessel monitoring and control software]].
+==== 1.5 Modbus-TCP, mostly for SCADA systems ====
-===== 3. PGN overview =====
+Ideal for larger vessels, the GX built-in Modbus-TCP server enables SCADA system integration. For more details, see the [[https://www.victronenergy.com/live/ccgx:modbustcp_faq|Modbus-TCP FAQ]].
+===== 2. Integration details by Victron product =====
+==== 2.1 Systems with a GX Device ====
+For most installations and integrations, it will be best to use one of our [[venus-os:start|GX Products]]. It acts as a hub, collecting information from connected equipment, such as Inverters, Battery Monitors and Chargers; and then making them available to the MFD.
+==== 2.2 Other products featuring a VE.Can port ====
+All Victron products that feature a VE.Can port can be directly connected to the NMEA 2000 network, using the [[https://nocache.victronenergy.com/accessories/ve-can-to-nmea2000-micro-c-male|VE.Can to NMEA 2000 cable]].
+  * Skylla-i 24V Battery Chargers
+  * Skylla IP65 Battery Chargers
+  * Lynx Shunt VE.Can Battery Monitor
+  * Lynx Smart BMS
+  * SmartSolar MPPT Solar Chargers with VE.Can communications port
+  * Multi RS
+  * Inverter RS
+{{ :ve.can:nmea-2000:schema_nmea2000-vecan_mppt-skylla_nov_2016.png?nolink&500 |}}
+==== 2.3 VE.Bus and VE.Direct to NMEA 2000 interfaces  (DEPRECATED!) ====
+  * [[https://www.victronenergy.com/accessories/ve-bus-to-nmea2000-interface|VE.Bus to NMEA 2000 interface]]
+  * [[https://www.victronenergy.com/accessories/ve-direct-to-nmea2000-interface|VE.Direct to NMEA 2000 interface]], for BMV Battery Monitors (only).
+Note that the use of both those interfaces is deprecated. Use a GX device instead.
+===== 3. NMEA 2000 Details =====
+==== 3.1 PGN Lists ====
 Refer to our [[https://www.victronenergy.com/upload/documents/Whitepaper-Data-communication-with-Victron-Energy-products_EN.pdf|Datacommunication whitepaper]], page 8 and beyond, for a list of Victron products and their supported PGNs.
-===== 4. FAQ =====
+==== 3.2 NMEA 2000 instances ====
-Note that there are many more generic frequently asked questions answered in the [[https://www.victronenergy.com/upload/documents/Whitepaper-Data-communication-with-Victron-Energy-products_EN.pdf|Data communication white paper]].
+Instances are used in an NMEA 2000 network to identify multiple similar products connected to the same network.
-==== Q1: What about instances? Device instances, data instances? ====
+As an example, take a system with two battery monitors (one for the main battery bank, and another for the hydraulic-thruster bank) and also a Quattro inverter/charger. All three of those devices will send their battery voltage measurements out on the NMEA 2000 network. For the displays to show these values at the right place, they need to know which voltage belongs to what battery. That is what instances are for.
-See [[ve.can:changing_nmea2000_instances|]] for details on that.
+There are various types of instances, and for marine systems are two that matter: the Device instance and the Data instance. The Data instance goes by various different names, like Fluid instance, Battery instance and DC instance.
-==== Q2: Can MPPT Solar Chargers with a VE.Direct port also be connected? ====
+NMEA 2000 defines three different instances:
-No, they cannot be connected. Even though the [[https://www.victronenergy.com/accessories/ve-direct-to-nmea2000-interface|VE.Direct to NMEA 2000 interface]] can be physically connected to these solar chargers, it will not work. Use our [[https://www.victronenergy.com/solar-charge-controllers/smartsolar%20mppt%20ve.can|Solar Chargers with a VE.Can port]] instead.
+  * Data instances (Battery instance, Fluid instance, and similar)
+  * Device instance
+  * System instance
-Similarly, also a GX Device does not (yet) transmit data from connected Solar Chargers on its NMEA2000-out port.
+=== When is manual configuration of instances needed? ===
-==== Q3: What about terminators and network layout? ====
+  * For **Garmin, Furuno, Maretron and Navico (B&G, Lowrance, Simrad) systems**: no configuration needed. Required fields can be configured and selected on the MFD, usually by pressing and holding on a data field in the data bar until the selection pane comes up.
+  * For **Raymarine**, before selecting the fields on the MFD, the data instances, Battery and DC Detailed, typically need to be set up to be unique. For details, see the [[https://www.victronenergy.com/media/pg/Cerbo_GX/en/marine-mfd-integration-by-app.html#UUID-906e773b-f29c-2b77-56a8-d9ade87cc418|GX manual, Raymarine section]].
-A N2K CAN bus network needs to be laid out as in a backbone configuration, using drop cables to connect to each device. Also, there should be only two terminators in the network. Therefore:
+=== Further reading on NMEA 2000 instances ===
+  * [[https://www.victronenergy.com/media/pg/Cerbo_GX/en/marine-mfd-integration-by-nmea-2000.html|the NMEA 2000 chapter in the GX manual]].
+  * [[ve.can:changing_nmea2000_instances|How to change instances]]
+==== 3.3 Terminators and network layout ====
+A NMEA 2000 CAN-bus network needs to be laid out as in a backbone configuration, using drop cables to connect to each device. Also, there should be only two terminators in the network. Therefore:
   * Use the NMEA 2000 cable as the backbone.
-  * Run a separate drop cable separately to each Victron device. The drop cable will be one of these three products:
+  * Run a separate drop cable separately to each Victron device [[https://www.victronenergy.com/accessories/ve-can-to-nmea2000-micro-c-male|VE.Can to NMEA 2000 cable]]
-    * [[https://www.victronenergy.com/accessories/ve-bus-to-nmea2000-interface|VE.Bus to NMEA 2000 interface]]
+  * Only terminate the NMEA 2000 backbone. Do not install a terminator in any of the VE.Can ports on the Victron products.
-    * [[https://www.victronenergy.com/accessories/ve-direct-to-nmea2000-interface|VE.Direct to NMEA 2000 interface]]
-    * [[https://nocache.victronenergy.com/accessories/ve-can-to-nmea2000-micro-c-male|VE.Can to NMEA 2000 cable]]
+Or:
-  * Only terminate the NMEA 2000 backbone, do not terminate on the VE.Can side.
+  * Have the NMEA 2000 network on one side, with one terminator. On the other end, change to the Victron network, with also one (Victron) terminator at the end.
+The first option is more aligned with the official NMEA 2000 method. But, in case of multiple Victron products that need to be connected to the NMEA 2000 network, will require more wire runs and definitively more NMEA 2000 to VE.Can conversion cables.
+==== 3.4 DC Voltage compatibility ====
+The Victron VE.Can network accepts 9 to 70VDC.
+The NMEA-2000 network used to be 9 to 16VDC, which is, or will be, expanded to also include 24V. Which means that some NMEA-2000 devices are 9 to 16VDC, some are 9 to 30VDC, and some allow higher voltages.
+Also, the Victron VE.Can network will (in most cases) be powered with battery voltage. So for a 48V system, the voltage on the VE.Can network **exceeds** the NMEA-2000 accepted voltage levels.
+Therefore, it is important to **not** connect those power cables.
+The Victron cable used to connect both networks together, the [[https://www.victronenergy.com/accessories/ve-can-to-nmea2000-micro-c-male|VE.Can to NMEA 2000 cable]], has a removable fuse which is to be removed in case separation is necessary. A printed warning label is attached to the cable to warn about this.
+==== 3.5 Galvanic isolation ====
+When connecting a GX to an NMEA 2000 network, it is recommend to do so using a galvanically isolated CAN-Bus port.
+This is especially the case when your NMEA backbone and GX are powered from separate power sources or do not share a common ground. These are the two most popular models that feature such galvanically isolated port:
+  * Cerbo GX MK2 (launched in 2024 as a successor to the Cerbo GX which did not feature an isolated port)
+  * Ekrano GX
+On both above products, VE.Can port 1 has galvanic isolation. VE.Can port 2 does not.
+For a full list of which ports feature isolation, see [[https://www.victronenergy.com/live/venus-os:start|this document]].
+==== 3.6 Further reading on Victron and NMEA 2000 ====
+  * [[https://www.victronenergy.com/upload/documents/Whitepaper-Data-communication-with-Victron-Energy-products_EN.pdf|Data communication white paper]]
+  * [[https://www.victronenergy.com/media/pg/Cerbo_GX/en/marine-mfd-integration-by-nmea-2000.html|Cerbo GX manual, NMEA 2000 chapter]]
+  * [[https://community.victronenergy.com/tag/nmea_2000_-_n2k |NMEA 2000 related discussions on Victron Community]]
+===== 4. Maretron =====
+All data sent out by Victron devices on the NMEA 2000 network can be picked up by the Maretron MFDs & software. See the [[http://www.maretron.com/products/N2KView.php|Maretron N2KView® vessel monitoring and control software]].
-==== Q4: What PGNs does a GX Device transmit on N2K? ====
+===== 5. FAQ =====
-See the [[https://www.victronenergy.com/live/ccgx:start#marine_mfd_integration_by_nmea2000|NMEA 2000 chapter in the CCGX manual]] for details.
+=== Q1: Can or must both Ethernet and and NMEA 2000 connection be made between Victron GX and MFD? ===
-==== Q5: Can integration onto Raymarine displays also be done without Empirbus NXT? ====
+Both can be made at the same time.
-Yes, see [[https://www.victronenergy.com/panel-systems-remote-monitoring/marine%20mfd%20gx%20integration%20-%20raymarine|the Raymarine integration page on our website]].
+Ethernet is needed to get the MFD App, as explained above.
-==== Q6: What about Maretron and other brand tank sensors on the Ccgx? ====
+And an NMEA 2000 connection is needed to get data to show in other fields on the MFD.
-See chapter 1.4.7 in the [[ccgx:start|]].
+See annotated screenshot above for which is what.