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NM31 - Fully Managed 8-Port Railway Ethernet Switch with PoE

Rugged Embedded Network Box

The NM31 family is a range of 8-port fanless and maintenance-free managed Power over Ethernet switches with IP40 protection, developed specifically for rough environmental conditions in rolling stock and automotive applications.

  • NM31 Product ImageNM31 Managed 8-Port Rugged Industrial Ethernet Switch
  • NM31 Product ImageNM31 Managed 8-Port Rugged Industrial Ethernet Switch
  • NM31 Product ImageNM31 Managed 8-Port Rugged Industrial Ethernet Switch
  • NM31 Product Image
  • NM31 Product Image
  • NM31 Product Image

Main Features

  • Fully managed 8-port rugged Ethernet switch
  • 10/100 (Fast) or 10/100/1000 Mbit/s variants
  • M12 A-, D- or X-coded
  • 29 Gbit/s carrier grade switching matrix
  • ITU-T G.8031/G.8032 Ethernet linear and ring protection switching
  • PoE+ Power Sourcing Equipment (PSE ), up to 60 W output power
  • Ultra-wide range rail power supply: 24 V DC to 110 V DC
  • -40 °C to +70 °C (+85 °C), fanless
  • Maintenance-free design
  • EN 50155 compliant (railways)
NM31 Product Image

Technical Data

Switch Key Features
  • Switching Matrix
    • 29 Gbit/s switching matrix for seamless throughput on all ports
    • MAC address table size: 8192 max.
    • Switching algorithm: Store-and-Forward with TCAM support
    • TCAM high-speed switching (Ternary Content-Addressable Memory)
  • General Network Support
    • IPv4
    • IPv6 Ready
    • IPv6 Ready Phase 2
  • Protocols and Functionality
    • DHCP Option 82
    • DHCP Server/Client
    • DHCP snooping
    • DHCP ARP inspection
    • DNS Client (RFC 2136)
    • DNS Proxy (RFC 5625)
  • Ports and Port Control
    • Energy Efficient Ethernet (IEEE 802.3az)
    • ETH Signal Equalization and Power Control
    • Port state (admin), speed, duplex mode and flow control
    • Port frame size (Jumbo Frames: 9216 bytes/packet max.)
    • Port status (link monitoring) and statistics (MIB counters)
    • Port VeriPHY (cable diagnostics), ActiPHY and PerfectReach
    • Inband management (VRAP)
    • PerfectReach
  • User Configuration Interfaces
    • HTTP/HTTPS
    • CLI
    • Telnet
    • Console
  • For more information on the switch firmware features see the firmware product page.
Power Over Ethernet
  • PSE (Power Sourcing Equipment)
  • Supply classes 0, 1, 2, 3
  • Number of PoE ports: 8
  • Total PoE power available: 60 W
  • Derating
    • > 55 °C: 0.9 W/K
Interfaces
  • Ethernet
    • 8x 10/100/1000BASE-T, M12, X-coded, receptacle
    • 8x 10/100/1000BASE-T, M12, A-coded, receptacle
    • 8x 10/100BASE-T, M12, D-coded, receptacle
  • Serial
    • 1x RS232, M12, A-coded, receptacle
  • LED
    • Status: power status (indicates power supply stability or range validity)
    • Ethernet: activity, link
  • Power
    • 1x power in, M12
    • Earthing connection
Electrical Specifications
  • Supply voltage
    • 24 V DC to 110 V DC nom. (EN 50155)
  • Power consumption: 85 W max. (with maximum PoE load)
Mechanical Specifications
  • Dimensions: (W) 220 mm, (D) 164 mm, (H) 44.1 mm
  • Weight: 1.5 kg max.
  • Mounting possibilities
    • Wall-mount
  • Cooling
    • Air cooling, natural convection, airflow 0.4 m/s
  • Protection rating: IP40 (when surface-mounted)
Product Compliance: Rail - Rolling Stock
  • Operating temperature: -40 °C to +70 °C, +85 °C for 10 min (EN 50155, class TX)
  • Storage temperature: -40 °C to +85 °C
  • Altitude: -300 m to +3000 m
  • Relative humidity (operation): max. 95% non-condensing
  • Relative humidity (storage): max. 95% non-condensing
  • Shock: 30 ms @ 50 m/s² (EN 61373:2010/AC:2017-09, vehicle body, cat. 1, class B)
  • Vibration (function): 1 m/s², 5 Hz to 150 Hz (EN 61373)
  • Vibration (lifetime): 7.9 m/s², 5 Hz to 150 Hz (EN 61373)
  • Power supply
    • Interruption of voltage supply: 10 ms (EN 50155, class S2)
  • Electrical Safety
    • EN 50153:2014
    • EN 50155:2007
  • Fire protection: EN 45545-2
  • EMC: EN 50121-3-2:2015
Reliability
MTBF: 511 624 h @ 40 °C according to IEC/TR 62380 (RDF 2000)

Ordering Information

Standard NM31 Models
09NM31-01

Managed 8-port 10/100 MBit Ethernet switch, PoE+ PSE (60W max), 14.4 to 154 V DC, EN 50155 class Tx compliant, -40 to +70(85)°C with qualified components, conformal coating

09NM31-03

Managed 8-port 10/100/1000 MBit Ethernet switch with A-Coded M12 connectors, PoE+ PSE (60W max), 14.4 to 154 VDC, EN 50155 class Tx compliant, -40 to +70(85)°C with qualified components, conformal coating

09NM31-05

Managed 8-port 10/100/1000 MBit Ethernet switch with X-Coded M12 connectors, PoE+ PSE (60W max), 14.4 to 154 VDC, EN 50155 class Tx compliant, -40 to +70(85)°C with qualified components, conformal coating

Software

Firmware/BIOS
14ETSW-01

Ethernet switch management firmware (Gen 1)

14ETSW-02

Ethernet switch management firmware (Gen 2)

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