Yacht Devices YDNU-02RM NMEA 2000 USB Gateway with SeaTalk NG Connector and USB-A Male, 0183 / N2K / RAW / AUTO Modes

Yacht Devices YDNU-02RM NMEA 2000 USB Gateway with SeaTalk NG Connector and USB-A Male, 0183 / N2K / RAW / AUTO Modes

The Yacht Devices YDNU-02RM is a bidirectional USB gateway designed to connect a NMEA 2000 marine network with a PC, laptop or tablet running Microsoft Windows, macOS or Linux. It allows compatible applications to receive vessel network data and can also transmit supported messages from the computer back to the NMEA 2000 network.

The YDNU-02RM version combines a Raymarine SeaTalk NG-compatible NMEA 2000 connector with a USB Type A Male connector. The USB connector is designed for direct connection to a PC USB port and must be used in a dry indoor location because this model is not waterproof.

Main Features

• Bidirectional communication between NMEA 2000 and USB
• Raymarine SeaTalk NG-compatible NMEA 2000 connector
• USB Type A Male connector
• Direct connection to a PC USB port
• Designed for dry indoor installation
• Supports USB 1.1, 2.0 and 3.0
• Operates as a Virtual COM Port
• Supports Microsoft Windows, macOS and Linux
• 0183, N2K, RAW and AUTO operating modes
• Supports AIS data
• Supports bidirectional NMEA 2000 message transfer
• 2500 VRMS galvanic isolation between USB and NMEA 2000
• Supports diagnostic recording
• Supports firmware updates

Supported Operating Modes

AUTO is the factory operating mode and automatically selects 0183, RAW or N2K for the current software session.

0183 Mode

In 0183 mode, the YDNU-02RM performs bidirectional conversion between the binary NMEA 2000 protocol and the text-based NMEA 0183 protocol. Conversion covers significant navigation data including AIS information.

NMEA 0183 applications can also use $PCDIN and $MXPGN sentences to exchange raw NMEA 2000 messages, providing access to extended engine data, tank information, battery data and compatible digital switching functions.

RAW Mode

RAW mode transfers NMEA 2000 messages between the vessel network and the PC in readable text format. This mode can be used for diagnostics and development of compatible custom applications.

N2K Mode

N2K mode transfers NMEA 2000 messages between the network and PC in binary form. The protocol is similar to Garmin Serial Protocol and is partially compatible with the ActiSense NGT protocol.

Electrical and USB Specifications

Physical Specifications

USB Connector and Installation

Models with the M suffix, including the YDNU-02RM, use a high-quality USB Type A Male connector with gold-plated contacts. The male connector is intended for direct insertion into a PC USB port.

The YDNU-02RM must be installed in a dry location inside the cabin. Unlike the F-suffix versions, the USB connector on this model is not waterproof.

PC Compatibility

At the software level, the gateway operates as a Virtual COM Port using USB device class 2, subclass 2.

• Microsoft Windows
• macOS
• Linux

Windows 10, macOS and Linux use system drivers and do not require a special driver for the gateway. Older Microsoft Windows versions require installation of a driver configuration file.

Marine Data Access

Depending on the information available on the connected NMEA 2000 network and the capabilities of the PC software, the gateway can provide access to:

• Vessel course
• Vessel speed
• Position
• Wind speed
• Wind direction
• Water depth
• AIS messages from vessels and aircraft
• Engine data
• Tank data
• Battery data

Bidirectional Operation

The YDNU-02RM can transmit messages from PC applications to the NMEA 2000 network as well as receive network data. This allows compatible software to exchange information with chart plotters and other onboard equipment.

A Silent Mode is available when only network monitoring is required. When enabled, the gateway blocks outgoing messages from PC applications to the NMEA 2000 network while continuing to pass network data to the PC.

Message Filtering

The gateway provides configurable filtering for messages transferred between the NMEA 2000 network and connected PC applications.

• Global incoming NMEA 2000 filter
• Global outgoing NMEA 2000 filter
• RAW mode receive and transmit filters
• N2K mode receive and transmit filters
• NMEA 0183 receive and transmit filters
• WHITE and BLACK filter modes
• Filtering by NMEA 2000 PGN
• Filtering by NMEA 2000 source address
• Filtering by NMEA 0183 sentence formatter

Autopilot Support

The gateway includes dedicated settings for controlling compatible Raymarine SeaTalk NG autopilots from NMEA 0183 applications when this functionality is enabled.

Diagnostics

The YDNU-02RM can record NMEA 2000 and USB interface traffic for diagnostic purposes. Diagnostic data is stored in an internal 1 MB EEPROM buffer.

• NMEA 2000 receive traffic
• NMEA 2000 transmit traffic
• USB receive traffic
• USB transmit traffic
• Current gateway settings

Typical diagnostic recording capacity is approximately 2 to 10 minutes depending on network traffic.

NMEA 2000 Installation

The YDNU-02RM can be connected directly to the NMEA 2000 / SeaTalk NG backbone without a drop cable. The gateway itself is powered from the USB port, while the NMEA 2000 network supplies power only to the isolated part of the network transceiver.

• Direct backbone connection supported
• Switch off NMEA 2000 bus power before connection
• Main device power supplied from USB
• NMEA 2000 network powers the isolated transceiver section

Package Contents

• YDNU-02RM NMEA 2000 USB Gateway – 1 pc.
• User Manual – 1 pc.

A NMEA 2000 drop cable is not supplied. The gateway can be connected directly to the network backbone without a drop cable.

Product Identification