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Comar SLR400Ni

Technical information and details SLR400Ni

Sebastian Olias avatar
Written by Sebastian Olias
Updated over 3 months ago
SLR400Ni-MT-FrontLeft-1920x1440_1440px.jpg

The SLR 400Ni is tailored for shoreline AIS signal monitoring and is one of the latest MarineTraffic AIS receivers introduced in July 2022.

This compact device integrates a dual-channel VHF receiver and operates on the Raspberry Pi mini-computer platform. Featuring built-in Ethernet, WiFi, and USB interfaces, it effortlessly connects to any wired or wireless network. It allows data streaming to up to five user-defined destinations, excluding the reserved MarineTraffic data stream.

The unit offers flexibility. It can receive and decode all AIS transmissions from vessels equipped with Class A or Class B AIS transceivers, as well as AIDS to Navigation and SART. Users can employ the receiver's web UI for local plotting or utilize the software on their computers for visualization purposes.

Technical Information

Receiver

  • 2 Channel AIS receiver
    for 161.975 MHz and 162.975 MHz

  • Class A/B, Adjacent Channel Selectivity 70dB, blocking >90dB

Sensitivity

  • > -112 dBm for 20% MER

Power

  • 5V DC, 3A

  • USBC Power Connector

Operating Temperature

  • -15°C to +55°C

Connector

  • BNC 50Ω for antenna

  • RJ45 Ethernet Connector

  • Wifi

  • 2x USB 2.0 Connector

  • 2x USB 3.0 Connector

  • HDMI

LED

  • Green Power LED

  • 2x Red Reception LED A/B

Output

  • NMEA0183, 38.400 Baud, VDM

Protocol

  • TCP, UDP, ARP, ICMP, TFTP, Telnet, DHCP, BOOTP, HTTP, AUTOIP

Dimensions

  • 95x90x28 mm

Weight

  • 180 g

Wiring Diagram

SLR400Ni_wiring.jpg

LED Status

The green LED (POWER) shows that the device is on. If no green light appears, recheck the power connection.

The two red LEDs (A/B) blink from time to time when it receives AIS data. If one of the red LEDs does not blink irregularly, check the antenna, the coax cable, and the cable connections. It indicates that the device receives no AIS data.

The orange and green LED on the network port is off if no network cable is connected or nothing is connected to the other end of the network cable. In this case, check the network cable and the connection.

The orange LED on the network port is permanently on when a connection has been established to a network device (e.g., switch).

The green LED on the network port flashes when a connection has been established (see orange LED). It does not mean that the data is being transmitted to MarineTraffic.

Links

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