Fast or Gb BASE-T Ethernet via M12 Connectors, -40°C to +85°C Operating

Manufacturer: duagon MEN

MEN's NM31 family is a range of 8-port fanless and maintenance-free managed Power over Ethernet switches, developed specifically for extreme and rough environmental conditions in rolling stock applications.

High Speed, High Efficiency and Extensive Protocols

The NM31 range of managed switches provides the additional ability to configure, manage and monitor the LAN which allows more control over how data travels through the network and who has access. The use of the identical firmware as provided for the G101 Ethernet Switch simplifies complex administration and reduces efforts for administrator training. Versatile Application Possibilities

Versatile Application Possibilities

The NM31 range provides eight channels at the front panel, accessible through M12 connectors and cover different application requirements including PoE+, IEEE802.3at type 1 and type 2 (previously af and at) compliant, and either 100 Mb or 1Gb Ethernet interfaces.

Compliant to Railway Standards

The voltage supply for the NM31 Managed Power over Ethernet Switch is designed for maximum flexibility and supports wide range input supply voltages from 14.4 to 154 VDC, and meets all EN50155 class S2 requirements for voltages ranging 24 to 110 VDC.

Conduction Cooled

The NM31 is designed for fanless operation at temperatures ranging from -40 to +70°C. The NM31 features IP40 protection when surface-mounted and cooling fins which serve as a heatsink for the internal electronics, and in this way provides conduction cooling.

Familiar Family Concept

As a member of MEN's family of extremely rugged industrial box PCs, the NM31 provides the same flexibility and scalability, as well as a look and feel which is common to the family

Main Specification

FunctionGeneral Network Support
• IPv4
• IPv6 Ready
• IPv6 Ready Phase 2

Host Configuration Protocols
• DHCP Server / Client
• DHCP Option 82
• 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 max.)
• Port status (link monitoring) and statistics (MIB counters)
• Port VeriPHY (cable diagnostics), ActiPHY™ and
• PerfectReach™
• Inband management (VRAP)

Switch Management and Monitoring
• • Link OAM: IEEE 802.3ah (a.k.a. EFM)
• • CFM: IEEE 802.1ag
• • ITU-T Y.1731 Down-MEP, ITU-T Y.1731 Up-MEP, ITU-T Y.1731 MIP
• • MEF E-LMI Configuration Management
• • SMAC/DMAC Swap
• • OAM Performance Monitoring MEF35 Phase 1
• SNMP Management v1, v2c, v3 (RFC 1212, 1901-1908, 3411-3418)
• SNMP v1 Traps (RFC 1157) with multiple destinations
• LLDP (IEEE 802.10AB)
• TIA 1057 LLDP-MED extensions
• CDP (Cisco Discovery Protocol)
• RMON Group 1, 2, 3 and 9 (RFC 2819)
• Syslog (RFC 5424)
• sFlow (RFC 3176)
• Port and Flow Mirroring
• Fallback Firmware

Configuration Management
• TFTP (RFC 1350)
• Fallback Configuration
• Configurable by Web / CLI / Telnet /SSL / Console

Redundancy and Flow Control
• Static Link Aggregation
• IEEE 802.3ad Link Aggregation Protocol
• IEEE 802.3X Back Pressure Flow Control
• IEEE 802.1D Spanning Tree Protocol (STP)
• IEEE 802.1w Rapid STP (RSTP)
• IEEE 802.1s Multiple STP (MSTP)
• BDPU Guard / Restrict Role
• ITU-T:G.8032 Ring Protection
• ITU-T:G.8031 Linear Protection
• IEEE 802.1ag / ITU-T Y.1731 Connectivity Fault Protection
• Loop Protection

• Network Access Server (NAS):
• • Port-based IEEE 802.1x
• • Single and multiple IEEE 802.1x
• • MAC based authentication
• • VLAN and QOS assignment
• • Guest VLAN
• RADIUS accounting (RFC 2866ff)
• MAC address limit and MAC freeze
• IP MAC Binding / Binfind dynamic to static
• TACACS+ Accounting
• Web and CLI Authentication
• IP Source guard
• Authorization (15 user levels)
• DHCP Snooping (RFC 2132)
• Dynamic ARP Inspection

• VLAN Tagging and Trunking (IEEE 802.1Q)
• Supported VLAN Types:
• • Private Static VLAN (RFC 5517)
• • MAC, Protocol, IP-Subnet and Port based VLAN (IEEE 802.1Q)
• • VOICE VLAN (IEEE 802.1Q, IEEE 802.1P)
• Dynamic VLANs (GVRP)
• Multicast VLAN Registration (IEE 802.1ak MRP and MVRP)
• MRP/GMRP Multicast Registration Protocol (IEEE 802.1ak)

• Active Priority Queues per Port: 8
• Class of Service (IEEE 802.1p)
• Port and queue egress shaper
• Storm control (for Unicast, Broadcast, Multicast, unknown)
• Port and Queue Egress shaper
• Scheduler Mode (weighted and fair scheduling)
• Port Default/User Priority and Input Priority Mapping
• DCSP remarking (RFC 2474)
• QoS control list (QCL mode))
• Random Early Detection (RED, RFC 2309)
• Policers (port, service, queue and global/VCAP - ACL)
• DiffServ (RFC 2474) and Tag remarking

• NTPv4 Client (RFC 5005)
• IEEE 1588v2 PTP with one-step and two-step clock
• 1588v2 PTP with redundant master clocks
• IEEE 1588v2 boundary clock
• IEEE 1588v2 unicast and multicast support

Supported Industrial Ethernet Protocols
• EtherNet/IP
• Modbus/TCP
• Profinet (Essential: IEEE 802.1Q)

Console interface
• RS232 rear console port for local system management

Web interface
• Web-based control and management interface over any Ethernet port

Power over Ethernet functions on all ports
• PSE (Power Sourcing Equipment) function
• Up to 60 W total output power
Interface(s)The following configurations are available:
• 8x 10/100BASE-T managed switch, 8x PoE + PSE with max. 60 W output power (Model: 09NM31-01)
• 8x 10/100/1000BASE-T managed switch, 8x PoE + PSE with max. 60 W output power (Model: 09NM31-03)
• 8x 10/100/1000BASE-T managed switch with X-coded connectors, 8x PoE + PSE with max. 60 W output power (Model: 09NM31-05)
Connection(s)Ethernet (front)
• Eight M12 connectors, all interfaces

Ethernet LED (front)

Power supply (front)
• One M12 connector for ultra wide range power

Power status LED (front)
• Indicates power supply stability or range validity

RS232 (rear)
• One M12 service console



ElectricalSupply voltage
• 14.4 VDC to 154 VDC
• Nominal voltages 24, 36, 48, 72, 96 and 110V VDC, according to EN50155
• Power interruption class S2 (10 ms)
• 18 VDC to 32 VDC

Power consumption
• +85 W Max. with 60W PoE Max.
MechanicalHeight 44.1 mm x Width 220 mm x Length 164 mm

IP protection
• IP40 when surface-mounted
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 according to class Tx (EN 50155)
• Fanless operation
Temperature range (storage): -40 to +85°C
HumidityRelative humidity range (operation): max. 95% non-condensing
Relative humidity range (storage): max. 95% non-condensing
Weight10/100BASE-T managed switch: 1400 g
10/100/1000BASE-T managed switch: 1500 g
Altitude-300 m to +3000 m
VibrationVibration (function): 1 m/s², 5 Hz to 150 Hz (EN 61373)
Vibration (lifetime): 7.9 m/s², 5 Hz to 150 Hz (EN 61373)
Shock50 m/s², 30 ms (EN 61373)
MTBF511 624 h @ 40°C according to IEC/TR 62380 (RDF 2000)
• UL 94V-0

Fire Protection
• EN 45545-2

Electrical Safety
• EN 60950-1, class I equipment
EMCEMC Conformity (Railway)
• EN 50121-3-2
Warranty2 Years


Ordering Details

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

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

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
Recab UK
Interested in this Product?

Get In Touch