Ethernet
The Ethernet ports can be used to connect radar sensors and other radar processing units to
utilize the inter-switching functionality.
The Ethernet ports can also be used to:
• Transmit the Binary Image of the screen to a VDR.
• To receive own-ship sensor data.
• To connect the radar to a Bridge Alarm Managment system (BAM).
• To share data received on the serial ports, Serial to Network Gateway Function (SNGF).
Ethernet connector details
Unit socket (female)
The unit is equipped with standard RJ45 connector(s).
Ethernet expansion device
Connection of network devices can be made via a managed Ethernet expansion device.
Additional expansion devices can be added to provide the required number of ports.
Typically, a simple network consisting of only NMEA® 0183 sentences and screen capture
images from radars and ECDIS to VDR, and ECDIS route exchange transmitted over LAN using
LWE protocol would not need any filtering of the network traffic.
However, to avoid potential problems with certain network infrastructure equipment and
port loops, a managed switch shall be used to interconnect components of an LWE network.
Introduction to Lightweight Ethernet
Lightweight Ethernet (LWE), defined by IEC61162-450, is a protocol defined to enable an
Ethernet connection between multiple talkers and multiple listeners, using the messages
defined in IEC61162-1/2. LWE is an IP-based implementation, making use of a multicast
address and corresponding User Datagram Protocol (UDP) port for transmission. LWE is
essentially a means to share data between units over Ethernet.
There are some restrictions on the connection of LWE networks:
• The different components are connected through an Ethernet switch, and connection to
a router or repeater hubs are not allowed
• No multicast filtering is configured
Equipment on the network that performs system functions can transmit and receive
information. Each System Function (SF) is identified by a System Function Identifier (SFI)
which is unique on any boat network.
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Note: If no SFI is entered (remaining with the default 9999 value), the device will not be
visible on the LWE network, and it will not share any data.
Every device that is a part of the LWE network shall be assigned an IP address (10.0.0.1 to
10.255.255.253 or 192.168.0.1 to 192.168.255.254). This IP address is to be chosen as a unique
address for every device on the boat network.
Wiring | R5000 radar processor Installation Manual
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