24x 10/100/1000BASE-TX ports via M12 Connectors, -40°C to +85°C OperatingIntroductionSpecification

Manufacturer: duagon MEN

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

Flexible Concept in a Small Housing

The NL33 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 NL33 offers two optional Ethernet fibre ports with 1000BASE-SX as a standard variant. The mechanical concept is an extremely compact, high-quality aluminium 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 NL33 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 make NL33 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 NL33 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 (in load sharing mode with internal PoE power supply).

Maintenance Free and Extremely Rugged

The NL33 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.

Main Specification

FunctionSwitching 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 Log• approved

Protocols and Functionality
• DHCP ARP inspection
• DHCP Optio82
• DHCP Server/Client
• DHCP snooping
• DNS Client (RFC 2136)
• DNS Proxy (RFC 5625)

Ports and Port Control
• Energy Efficient Ethernet (IEEE 802.3az)
• ETH Signal Equalization and Power Control
• Inband management (VRAP)
• Port frame size (Jumb• 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
Interface(s)The following configurations are available:
• 2x 1000BASE-SX, Q-ODC, receptacle
• 24x 10/100/1000BASE-T, M12, X-coded, receptacle
• 24x 10/100/1000BASE-T, M12, A-coded, receptacle
• 22x 10/100BASE-T, M12, D-coded, receptacle
• 2x 10/100/1000BASE-T, M12, A-coded, receptacle
• D-coded connectors are typically combined with two A-coded connectors for uplink.


ElectricalSupply voltage
• 24 V DC to 110 V DC nom. (EN 50155)

Power consumption
• 30 W max.
Mechanical(W) 390 mm, (D) 236 mm, (H) 89 mm

IP protection: IP30 when surface-mounted
Mounting possibilities
• Wall-mount
• Rack-mount in 19" cabinet
Conformal CoatingConformal coating of internal components as standard
SoftwareFirmware for configuration and management
TemperatureTemperature range (operation)
• -40 to 70°C (screened), with up to 85°C for 10 minutes (EN 50155:2017, class OT4, ST1)
• Air cooling, natural convection, airflow 0.4 m/s
Temperature range (storage): -40 (EN 50155:2017) to +85°C (EN 60068-2-2, Bb)
Humidity+55°C and +25°C, 100 % max. (EN 50155:2017)
Weight6.55 kg max.
Vibration10 min @ 2.02 m/s2 and 5 h @ 11.44 m/s2 (EN 61373:2010/AC:2017-09, vehicle body, cat. 1, class B x 2)
Shock30 ms @ 50 m/s2 (EN 61373:2010/AC:2017-09, vehicle body, cat. 1, class B)
MTBF347 209 h @ 40C according to IEC/TR 62380 (RDF 2000)
Safety/CertificationEN 50121-3-2:2016
EMCEN 50121-3-2:2016
Regelung Nr. EMV 06 :2014-07-29, Anhang E: Messung an Geräten
Warranty2 Years


Ordering Details

BoardThe "NL" Ethernet switch family principle is based on a wide range of configuration options to easily adapt the switch to application requirements.

Please contact us for ordering information.
Recab UK
Interested in this Product?

Get In Touch