NL34 - Robust 24-Port Fully Managed Ethernet Switch with PoE

"NL" Family Principle

MEN's "NL" Ethernet switch family principle is based on a wide range of configuration options (e.g., amount of Ethernet ports, fiber connections or Power over Ethernet) to easily adapt the switch to application requirements.

Flexible Concept in a Small Housing

The NL34 is a 24+2-port fully managed layer 2/3 Ethernet switch, providing a wide range of configuration options with 24 M12 Gigabit Ethernet ports. M12 connectors can be configured to be A-, D- or X-coded and combinations are also possible. The X-coded connectors are designed as push-pull and screwed variants (Harting concept). The NL34 offers two optional Ethernet fiber ports with 1000BASE-SX as standard variant. The mechanical concept is an extremely compact, high-quality aluminum housing providing high port density and ultra-high ruggedness. It is designed for wall-mounting, but mounting in a 19" rack is also an option.

Performance, Security and Diagnostic Features

The 29 Gbit/s, TCAM based, store-and-forward switching matrix of the NL34 allows high-performance layer 2 switching over all connected interfaces. For easy remote management and access, layer 3 protocols, e.g., IPv4/IPv6 and DHCP, are integrated. The switch provides extended security features like SNMPv3, SSH and HTTPS. Traffic isolation (VLAN) and switching redundancy protocols (e.g., STP, RSTP, MSTP) provide safe running of the network using redundant data paths in the event of a fault. The ITU-T G.8031/G.8032 ring and linear protection switching feature set makes NL34 able to create network ring scenarios with recovery time under 50 ms. Monitoring and diagnosis functions, e.g., sFlow or SNMPv1, v2c, v3 are provided.

Wide-Range Power Supply and Power over Ethernet

The EN 50155 compliant supply voltage range of 24 V DC to 110 V DC provides maximum flexibility for using the switch. The NL34 comes with internal Power over Ethernet for 22 ports with a maximum of 30 W per port and a total of 90 W. With external PoE supply PU28, up to 600 W PoE output power are available.

Maintenance Free and Extremely Rugged

The NL34 is designed for fanless operation at temperatures ranging from -40 °C to +70 °C (10 min @ +85 °C). The cooling fins serve as a heat sink for the internal electronics. It is maintenance-free and developed specifically for rough environmental conditions in rolling stock applications. Long-term availability until 2026 from product start minimizes lifecycle management by making the system available at least for this period of time.

Features

  • 24x 10/100/1000BASE-TX ports
  • 2x 10/100/1000BASE-TX uplink ports with bypass relay on one uplink pair
  • M12 A-, D- or X-coded (screwed and push-pull)
  • 22x PoE+ Power Sourcing Equipment, up to 600 W
  • Ultra-wide range rail power supply: 24 V DC to 110 V DC
  • ITU-T G.8031/G.8032 Ethernet linear and ring protection switching
  • 2x 1000BASE-SX fiber uplink (Q-ODC) (optional)
  • -40 °C to +70 °C (+85 °C), fanless
  • EN 50155 compliant (railways)

Specifications

Switch Key Features
  • Switching matrix
    • Total switching capacity of chipset: 29 Gbit/s
    • MAC address table size: 8192
    • Switching algorithm: Store-and-forward, TCAM high-speed (Ternary Content-Addressable Memory)
  • General network support
    • IPv4
    • IPv6
    • IPv6 Ready Logo approved
  • Protocols and functionality
    • DHCP ARP inspection
    • DHCP Option 82
    • DHCP Server/Client
    • DHCP snooping
    • DNS Client (RFC 2136)
    • DNS Proxy (RFC 5625)
    • IEEE 1588v2 PtP
    • One-step and two-step clocks
    • Transparent clock
  • Ports and port control
    • Energy Efficient Ethernet (IEEE 802.3az)
    • ETH Signal Equalization and Power Control
    • Inband management (VRAP)
    • Port frame size (Jumbo Frames: 9216 bytes/packet max.)
    • Port state (admin), speed, duplex mode and flow control
    • Port status (link monitoring) and statistics (MIB counters)
    • Port VeriPHY (cable diagnostics), ActiPHY and PerfectReach
  • User configuration interfaces
    • Command line interface (CLI) via console, SSHv2, Telnet
    • Web interface (HTTP/HTTPS) via IPv4, IPv6
  • See the firmware product page for more information on the switch firmware features.
Power Over Ethernet
  • PSE (Power Sourcing Equipment)
  • Supply classes 0, 1, 2, 3, 4
  • Number of ports: 22
  • Total power available: 90 W (600 W with external power supply)
Interfaces
  • This product includes interface options
  • Ethernet
    • 2 × 1000BASE-SX, Q-ODC, receptacle
    • 24 × 10/100/1000BASE-T, M12, X-coded, receptacle
    • 24 × 10/100/1000BASE-T, M12, A-coded, receptacle
    • 22 × 10/100BASE-T, M12, D-coded, receptacle
    • 2 × 10/100/1000BASE-T, M12, A-coded, receptacle
    • D-coded connectors are always combined with two A-coded connectors for uplink.
    • For possible combinations contact MEN.
  • Serial
    • 1 × RS232, non-isolated, M12, A-coded, receptacle (console port)
  • LED
    • Status: power status, system status
    • Ethernet: activity, link
  • Power
    • 1 × power in, M12, A-coded, plug
    • 1 × PoE power in, M12, L-coded, plug
  • Earthing connection
    • M6 screw
Supervision and Control
  • Temperature measurement
  • Watchdog timer
Electrical Specifications
  • Supply voltage: 24 V DC to 110 V DC nom. (EN 50155)
  • Power consumption: 130 W max. (with maximum PoE load)
Mechanical Specifications
  • Dimensions: (W) 390 mm, (D) 236 mm, (H) 89 mm
  • Weight: 6.55 kg max.
  • Mounting
    • Wall-mount
    • Rack-mount in 19" cabinet
  • Cooling: Air cooling, natural convection, airflow 0.4 m/s
  • Protection rating: IP30
Product Compliance: Rail - Rolling Stock
  • Operating temperature: -40 °C to +70 °C, +85 °C for 10 min (EN 50155:2017, class OT4, ST1)
  • Rapid temperature variations: EN 50155:2017, class H1, no requirements
  • Storage temperature: -40 °C (EN 50155:2017) to +85 °C (EN 60068-2-2, Bb)
  • Altitude: +3000 m max. (EN 50125-1:2014, class AX)
  • Pollution degree: EN 50124-1:2017, class PD2
  • Humidity: +55 °C and +25 °C, 100 % RH max. (EN 50155:2017)
  • Shock: 30 ms @ 50 m/s² (EN 61373:2010/AC:2017-09, vehicle body, cat. 1, class B)
  • Vibration: 10 min @ 2.02 m/s² (functional) and 5 h @ 11.44 m/s² (long-life) (EN 61373:2010/AC:2017-09, vehicle body, cat. 1, class B x 2)
  • Power supply
    • General compliance with power supply requirements of EN 50155:2017
    • Interruption of voltage supply: 10 ms (EN 50155:2017, class S2)
  • Electrical safety
    • EN 50155:2017
    • EN 50153:2014 + A1:2017
    • EN 50124-1:2017
    • EN ISO 13732-1:2008
  • Fire protection: EN 45545-2:2013 + A1:2015, HL3
  • EMC emission
    • EN 50121-3-2:2016
    • Regelung Nr. EMV 06 :2019-05-09 (2.0), Anhang E: Messung an Geräten
  • EMC immunity: EN 50121-3-2:2016
  • Protective coatings: EN 50155:2017, class PC2 (Any PCB protected on both sides)
  • Useful life: 20 years (EN 50155:2017, class L4)
Reliability
347 209 h predicted @ 40 °C according to IEC/TR 62380 (RDF 2000)

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