MEN NL31, NL34, NL30, NL33 User Manual

User Manual



NL31

Robust 12-Port Fully Managed Ethernet Switch with PoE

Layer 2/3 Switch with M12 Front Connectors & Fiber Option

2019-02-1320NL31-00 E1

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Contents

Contents

Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

About this Document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Product Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Product Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1 Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

1.1 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

1.2 Product Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

1.2.1 Interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

1.2.2 Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

1.3 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

1.4 Cooling Concept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

1.5 Product Identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

2 Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.1 Unpacking the NL31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

2.2 Mounting the NL31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

2.2.1 Safety Instructions for Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.2.2 Mounting on a Wall or a Horizontal Surface . . . . . . . . . . . . . . . . . . 18

2.3 Connecting and Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

2.3.1 Safety Instructions for Connection . . . . . . . . . . . . . . . . . . . . . . . . . .19

2.3.2 Connecting an Earthing Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

2.3.3 Connecting the Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

2.3.4 Connecting the Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

2.4 Accessing the Ethernet Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

2.4.1 Web Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

2.4.2 Command Line Interface (CLI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

2.5 Configuring Basic Switch Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

2.5.1 Resetting the Configuration to Factory Defaults . . . . . . . . . . . . . . .24

2.5.2 Setting the Device Hostname . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

2.5.3 Setting a Password for the Admin User . . . . . . . . . . . . . . . . . . . . . .24

2.5.4 Setting the VLAN 1 IP Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

2.5.5 Displaying and Saving the Configuration . . . . . . . . . . . . . . . . . . . . .26

3 Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

3.1 Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

3.2 Isolation Voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

3.3 Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

3.3.1 PoE+ Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

3.3.2 Front Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

3.3.3 Power over Ethernet (PoE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

3.3.4 Ethernet Status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

3.3.5 Ethernet Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

3.4 RS232 (Console). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

3.4.1 Front Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

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Contents

3.5 Status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

4 Switch Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

5 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

5.1 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

5.2 Updating the Switch Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Figures

Figure 1. Front interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Figure 2. Functional diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Figure 3. Product label. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Figure 4. Power configuration and coding labeling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 5. Accessing the help option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Tab le s

Table 1. Connector types – power supply (4-pin M12 A-coded). . . . . . . . . . . . . . . . . . . 28

Table 2. Pin assignment - power supply (4-pin M12 A-coded) . . . . . . . . . . . . . . . . . . . .28

Table 3. Signal mnemonics – power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Table 4. Isolation voltages (with A- or/and D-coded connectors) . . . . . . . . . . . . . . . . . 28

Table 5. Isolation voltages (with X-coded connectors) . . . . . . . . . . . . . . . . . . . . . . . . . .28

Table 6. Connector types – 5-pin, M12, L-coded. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Table 7. Pin assignment - power supply (5-pin M12 L-coded) . . . . . . . . . . . . . . . . . . . . 29

Table 8. Signal mnemonics – power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Table 9. Connector types – Ethernet (4-pin, M12, D-coded) . . . . . . . . . . . . . . . . . . . . . . 30

Table 10. Pin assignment – Ethernet (4-pin M12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Table 11. Signal mnemonics – Ethernet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Table 12. Connector types – Ethernet (8-pin M12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Table 13. Pin assignment – Ethernet (8-pin M12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Table 14. Signal mnemonics – Ethernet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Table 15. Connector types – Ethernet M12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

Table 16. Pin assignment – Ethernet (8-pin M12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Table 17. Signal mnemonics – Ethernet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

Table 18. Connector types – Q-ODC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Table 19. Pin assignment – Q-ODC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Table 20. Signal mnemonics – Q-ODC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Table 21. Power over Ethernet classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Table 22. Ethernet status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Table 23. Default switch configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Table 24. Connector types – RS232 M12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Table 25. Pin assignment – RS232 M12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Table 26. Signal mnemonics – RS232 M12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Table 27. General status LEDs at front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

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About this Document

About this Document

This document is intended only for system developers and integrators.

It describes the design, functions and connection of the product. The manual does not
include detailed information on individual components (data sheets etc.).

History

NL31 product page with up-to-date information and downloads:

www.men.de/products/nl31/

Issue Comments Date

E1 First issue 2019-02-13

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About this Document

Conventions

Indicates important information or warnings concerning situations which
could result in personal injury, or damage or destruction of the
component.

Indicates important information concerning electrostatic discharge which
could result in damage or destruction of the component.

Indicates important information or warnings concerning proper
functionality of the product described in this document.

The globe icon indicates a hyperlink that links directly to the Internet.
When no globe icon is present, the hyperlink links to specific information
within this document.

Italics Folder, file and function names are printed in italics.

Comment

Comments embedded into coding examples are shown in green text.

IRQ#
/IRQ

Signal names followed by a hashtag "#" or preceded by a forward slash "/"
indicate that this signal is either active low or that it becomes active at a
falling edge.

In/Out Signal directions in signal mnemonics tables generally refer to the

corresponding board or component, "in" meaning "to the board or
component", "out" meaning "from the board or component".

0xFF Hexadecimal numbers are preceded by "0x".

0b1111 Binary numbers are preceded by "0b".

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Product Safety

Product Safety

Read the user manual carefully before using the product. Keep the user manual for later
reference.

Conditions for Use, Field of Application

The product is designed to function correctly in the market, application area and
environmental conditions specified in the applicable standards which are listed in the
Technical Data.

Use cases in environments exceeding the specifications in the applicable standards and
the Technical Data have to be agreed upon between MEN and the customer.

Electrostatic Discharge (ESD)

Qualified Personnel

The product/system described in this documentation may be operated only by
personnel qualified for the specific task in accordance with the relevant documentation,
in particular its warning notices and safety instructions. Qualified personnel are those
who, based on their training and experience, are capable of identifying risks and
avoiding potential hazards when working with these products/systems.

Computer boards and components contain electrostatic sensitive devices.
Electrostatic discharge (ESD) can damage components. To protect the PCB
and other components against damage from static electricity, follow some
precautions whenever you work on your computer.

 Power down and unplug your computer system when working on the

inside.

 Hold components by the edges and try not to touch the IC chips, leads,

or circuitry.

 Use a grounded wrist strap before handling computer components.

 Place components on a grounded antistatic pad or on the bag that came

with the component whenever the components are separated from the
system.

 Only store the product in its original ESD-protected packaging. Retain

the original packaging in case you need to return the product to MEN for
repair.

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Product Compliance

Product Compliance

MEN products are no ready-made products for end users. They are tested according to
the standards given in the Technical Data and thus enable you to achieve certification of
the product according to the standards applicable in your field of application.

If the product delivered was certified by MEN and is modified by the customer, e.g., by
installing an additional hardware component, the certification achieved by MEN
becomes invalid and has to be repeated for the new product configuration.

RoHS

MEN is committed to develop and produce environmentally compatible products
according to the Restriction of Hazardous Substances (RoHS) Directive 2011/65/EU
(formerly 2002/95/EC) of the European Union.

Since July 1, 2006 all MEN standard products comply with RoHS legislation.

REACH

MEN is a manufacturer of electronic products and thus a so-called "downstream user" in
terms of REACH. The products MEN supplies are solely non-chemical goods. Moreover
and under normal and reasonably foreseeable circumstances of application, the goods
supplied shall not release any substance.

Beyond that, according to REACH – Art.33, MEN will inform the customer immediately
should a substance contained in an MEN product (with a content of > 0.1%) be classified
alarming by the European Chemicals Agency (ECHA).

WEEE Application

Nevertheless, MEN is registered as a manufacturer in Germany. The registration number
can be provided on request.

The WEEE directive does not apply to fixed industrial plants and tools. The
compliance is the responsibility of the company which puts the product
on the market, as defined in the directive; components and sub­assemblies are not subject to product compliance.
Since MEN does not deliver ready-made products to end users, the WEEE
directive is not applicable for MEN. Users are nevertheless recommended
to properly recycle all electronic boards which have passed their life cycle.

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Disclaimer

Disclaimer

Changes

MEN Mikro Elektronik GmbH ("MEN") reserves the right to make changes without further
notice to any products herein.

Liability

MEN makes no warranty, representation or guarantee of any kind regarding the
suitability of its products for any particular purpose, nor does MEN assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims
any and all liability, including, without limitation, consequential or incidental damages.
TO THE EXTENT APPLICABLE, SPECIFICALLY EXCLUDED ARE ANY IMPLIED WARRANTIES
ARISING BY OPERATION OF LAW, CUSTOM OR USAGE, INCLUDING WITHOUT LIMITATION,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE OR USE. In no event shall MEN be liable for more than the contract price for
the products in question. If buyer does not notify MEN in writing within the foregoing
warranty period, MEN shall have no liability or obligation to buyer hereunder.

Should the customer purchase or use MEN products for any unintended or
unauthorized application, the customer shall indemnify and hold MEN and its officers,
employees, subsidiaries, affiliates, and distributors harmless against all claims, costs,
damages, and expenses, and reasonable attorney fees arising out of, directly or
indirectly, any claim or personal injury or death associated with such unintended or
unauthorized use, even if such claim alleges that MEN was negligent regarding the
design or manufacture of the part. In no case is MEN liable for the correct function of the
technical installation where MEN products are a part of.

The publication is provided on the terms and understanding that:

1. MEN is not responsible for the results of any actions taken on the basis of
information in the publication, nor for any error in or omission from the publication; and

2. MEN is not engaged in rendering technical or other advice or services.

MEN expressly disclaims all and any liability and responsibility to any person, whether a
reader of the publication or not, in respect of anything, and of the consequences of
anything, done or omitted to be done by any such person in reliance, whether wholly or
partially, on the whole or any part of the contents of the publication.

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Contacts

Contacts

Copyright © 2019 MEN Mikro Elektronik GmbH. All rights reserved.

Germany

MEN Mikro Elektronik GmbH
Neuwieder Straße 1-7
90411 Nuremberg
Phone [phone]

France

MEN Mikro Elektronik SAS
18, rue René Cassin
ZA de la Châtelaine
74240 Gaillard
Phone [phone]

[e-mail]
www.men.de

[e-mail]
www.men-france.fr

USA

MEN Micro Inc.
860 Penllyn Blue Bell Pike
Blue Bell, PA 19422
Phone [phone]

China

MEN Mikro Elektronik (Shanghai) Co., Ltd.
Room 1215, #993 West Nanjing Road
Shanghai 200041
Phone [phone]

[e-mail]
www.menmicro.com

[e-mail]
www.men-china.cn

Product Overview

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1 Product Overview

1.1 Product Description

"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 NL31 is a 12+2-port fully managed layer 2/3 Ethernet switch, providing a wide range
of configuration options with 12 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 NL31
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 NL31 allows high­performance 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 NL31 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 NL31 comes with internal Power over Ethernet for 10
ports with a maximum of 30 W per port and a total of 90 W. With external PoE supply
PU28, up to 300 W PoE output power are available (in load sharing mode with internal
PoE power supply).

Maintenance Free and Extremely Rugged

The NL31 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.

Product Overview

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1.2 Product Architecture

1.2.1 Interfaces

Figure 1. Front interfaces

Power

Power over
Ethernet

Gigabit Ethernet
with Status LEDs

Status LED
(Power)

Switch
Operaon
LED

PoE Power
Status LED

Console Port
(RS232)

Fiber Uplink
(oponal)
ETH26

Fiber Uplink
(oponal)
ETH25

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1.2.2 Functions

Figure 2. Functional diagram

F

Powerin

PSU

UART

F

PoEPowerin

F

1000BASE‐SX

F

1000BASE‐SX

F

27LEDs

F

PoEPSU

FFront Options

10xGigabitEthernet

F

F

F

GigabitEthernet

GigabitEthernet

Bypass

Relay

PoE+

Vitesse

EthernetSwitch

PoE+

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1.3 Technical Data

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)

 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

Power Over Ethernet



PSE (Power Sourcing Equipment)

 Supply classes 0, 1, 2, 3, 4

 Number of PoE ports: 10

 Total PoE power available: 90 W (300 W with external power supply)

See the firmware product page for more information on the switch
firmware features:

www.men.de/software/14etsw-02/

Product Overview

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Interfaces



Ethernet

- 2x 1000BASE-SX, Q-ODC, receptacle

- 12x 10/100/1000BASE-T, M12, X-coded, receptacle

- 12x 10/100/1000BASE-T, M12, A-coded, receptacle

- 10x 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.

 Serial

- 1x RS232, M12, A-coded, receptacle

 LED

- Status: power status, system status

- Ethernet: link, activity

 Power

- 1x power in, M12, A-coded, plug

- 1x PoE in, M12, L-coded, plug

Supervision and Control



Temperature measurement

 Watchdog timer

Electrical Specifications



Supply voltage

- 24 V DC to 110 V DC nom. (EN 50155)

- 52 V DC (PoE+)

 Power consumption

- 130 W max. (with maximum PoE load)

Mechanical Specifications



Dimensions

- (W) 390 mm, (D) 236 mm, (H) 89 mm

 Weight: 6 kg max.

 Mounting possibilities

- Wall-mount

- Rack-mount in 19" cabinet

 Cooling

- Air cooling, natural convection, airflow 0.4 m/s

 Protection rating: IP30

Please contact MEN sales for component combination possibilities.

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Product Compliance: Rail - Rolling Stock



Operating temperature: -40 °C to +70 °C, +85 °C for 10 min (EN 50155:2017, class
OT4, ST1)

 Storage temperature: -40 °C (EN 50155:2017) to +85 °C (EN 60068-2-2, Bb)

 Humidity: +55 °C and +25 °C, 100 % 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 and 5 h @ 11.44 m/s² (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 :2014-07-29, Anhang E: Messung an Geräten

 EMC immunity: EN 50121-3-2:2016

 Useful life: 20 years (EN 50155:2017, class L4)

 Protective coatings: EN 50155:2017, class PC2 (Any PCB protected on both sides)

Reliability



MTBF: 350 000 h @ 40 °C according to IEC/TR 62380 (RDF 2000)

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1.4 Cooling Concept

The NL31 is cooled by natural convection for fanless operation.

1.5 Product Identification

MEN documentation may describe several different models and design revisions of the
NL31. You can find the article number, design revision and serial number affixed to the
NL31.

 Article number: Indicates the product family and model. This is also MEN’s main

ordering number. To be complete it must have 9 characters.

 Revision number: Indicates the design revision of the product.

 Serial number: Unique identification assigned during production.

If you need support, you should communicate these numbers to MEN.

Figure 3. Product label

Leave the following minimum space to all sides of the system that are
needed for cooling to enable the required airflow:

 15 cm

The following sides are needed for cooling:

 top

 front

 rear

 left

 right

x

Revisionnumber

Serialnumber

Completearticlenumber

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2 Getting Started

2.1 Unpacking the NL31

After unpacking, check whether there are any transport or other damages on the
system. If one of the following situations arises, have the equipment checked by service
personnel:

 The power cable or plug is damaged.

 Liquid has penetrated into the equipment.

 The equipment has been exposed to moisture.

 The equipment has been dropped and damaged.

 The equipment has obvious signs of breakage.

2.2 Mounting the NL31

Before installing the NL31, make sure that the installation site has been prepared and
that the operating environment meets the equipment requirements.

The NL31 network box has been designed to either sit on a flat surface or be securely
mounted to a wall or similar surface.

Electric Shock and Fire Hazard Caused by Damaged Device

Damaged equipment may be under dangerous voltage and can cause fire.
Damaged equipment has unpredictable behavior and characteristics.

 Prevent damaged equipment from being installed and put into

operation.

 Mark the damaged equipment and keep it under lock and key.

 Send the equipment to repair immediately.

Damage from Condensation

When the equipment has been subjected to low temperatures or extreme
temperature variations, condensation can form on or inside the system.
Humidity causes short circuits in electric circuits and damages the system.
To avoid damages, do the following:

 Store the equipment in a dry environment.

 Ensure that the equipment has the same temperature as the

environment before starting it up.

 Do not subject the equipment to the direct radiation of a heating device.

 Wait until the equipment has dried completely or wait 12 hours before

switching on the equipment.

 Please check all hardware requirements before mounting the NL31, as

any modifications necessary to the system are difficult, or even
impossible to do after the network box has been mounted.

 Please make sure to use the connectors listed in this manual. Other

connectors might cause damage to the device.

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2.2.1 Safety Instructions for Mounting

2.2.2 Mounting on a Wall or a Horizontal Surface

The following steps are necessary:

» Carefully measure and mark the position of the required screw holes to match the

position of the mounting holes on the NL31.

» Drill the screw holes for the M5 pan-head screws at the marked location.

» Secure the M5 pan-head screws at the marked location, making sure to leave at

least the following gap between the surface and the screw head:

- 5 mm

» Place the NL31 so that the wide openings of the mounting holes are over the screw

heads (1).

Risk of Damages or Injuries



Make sure that the cabinet or the wall where you want to install the
system supports the weight of the system.

Risk of Fire Through Overheating

Make sure that the equipment does not overheat. Overheating can cause
fire or malfunction of the device. Conformity to standards expires.

 Mount the equipment only in the mounting position described in this

document.

 Adhere to the environmental conditions specified in the Technical Data.

 Leave enough space to the sides of the system that are needed for

cooling to enable the required airflow as specified in chapter Cooling
Concept.

 Do not install the system near any heat sources (e.g., radiators, heaters).

Risk of Damage Through Liquids



Keep the system away from liquids. Avoid exposure to dripping or
splashing.

The necessary length of the M5 screws to mount the NL31 depends
on the structure of the surface.

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» Slide the box down so that the screw heads slip into the narrow part of the mount-

ing hole (2).

» Securely tighten the mounting screws to prevent potential damage which could be

caused by, e.g., vibration. The recommended tightening torque is between 2.0 Nm
and 2.2 Nm.

2.3 Connecting and Starting

2.3.1 Safety Instructions for Connection

Adhere to the following safety instructions before you connect the NL31:

 Works on the computer system may only be carried out by personnel

qualified for the specific task, who, based on their training and
experience, are able to identify risks and avoid potential hazards when
working with these products/systems.

 Any power input must be protected by an external fuse as defined in

chapter Connecting the Power Supply.

 Implement a readily accessible disconnect device external to the

system.

 Read all labels and warnings on the equipment carefully; especially the

power configuration and coding label affixed to the system chassis.

 Make sure that the voltage supplied by the external power supply

conforms with the voltage given on the power configuration and coding
label.

 Adhere to the wiring rules valid in your country when connecting the

system.

2

1

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2.3.2 Connecting an Earthing Cable

The NL31 features an earthing connection.

Carry out the following steps to connect the earthing cable:

» Use an earthing cable with a cross section of at least 4 mm

²

.

» Align the spring washer, the washer and the earthing cable over the M6 screw.

» Carefully place the screw with all aligned parts over the screw hole and fasten the

screw with a tightening torque of 3.5 Nm.

- For supply voltages 24 V DC and 36 V DC nominal:

This connection is a functional ground.

- For supply voltages 48 V DC to 110 V DC nominal:

This connection is a low impedance ground path for electrical safety.

2.3.3 Connecting the Devices

» Connect all Ethernet devices to be served.

 Connect the earthing cable before making any other connections!

A protective earth connection is essential for the system to meet its EMC
specifications.

 When disassembling the system, always detach the earthing cable last.

Spring washer Earthing cable Screw hole

WasherScrew

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2.3.4 Connecting the Power Supply

Connect an external power supply:

» Check the power configuration and coding labeling on the system for the exact config-

uration and pin assignment.

Figure 4. Power configuration and coding labeling

» Plug an external power supply and, if available, an external PoE power supply to the

respective power inlet connector.

- The rated current in the power supply line must be limited, which requires

an external fuse:

- After connecting the power supply, the switch will boot up with its default

settings.

Make sure that an earthing cable has been connected to the system
before connecting an external power supply and switching on the system.

Supply Voltage Fuse Type

Power in 8 A T

PoE in 12 A T

1|4
2|3

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2.4 Accessing the Ethernet Switch

2.4.1 Web Interface

The web interface provides an online help option for all configuration sheets which can
be accessed by clicking on the question mark in the top right corner of the screen:

Figure 5. Accessing the help option

2.4.2 Command Line Interface (CLI)

The CLI is accessible through telnet, ssh or the service console. It is generally comparable
with CISCO/HP CLIs. Help is provided by either using the ’tab’ key, or adding a question
mark and the system will indicate the next possible commands.

Note: CLI is Cisco-like but it may have different commands or commands may have a

different meaning or functionality.

The connection parameters for the serial virtual console interface are:

 115 200 baud

 8 bits

 No parity

 No handshake

 1 stop bit

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Example of a command line interface:

2.5 Configuring Basic Switch Settings

For configuration, the powered on device must have a functional computer connection
running a terminal emulator such as TeraTerm or PuTTY on Windows, or GtkTerm or
Minicom on Linux.

This chapter describes the base tasks to work with the CLI on the device.

Username: admin
Password: ***
#
# ?
alarm alarm
clear Clear/Reset functions
configure Enter configuration mode
copy Copy from source to destination
delete Delete one file in flash: file system
dir Directory of all files in flash: file system
disable Turn off privileged commands
do To run exec commands in the configuration mode
dot1x IEEE Standard for port-based Network Access Control
enable Turn on privileged commands
erps Ethernet Ring Protection Switching
exit Exit from EXEC mode
firmware Firmware upgrade/swap
help Description of the interactive help system
ip IPv4 commands
ipv6 IPv6 configuration commands
link-oam Link OAM configuration
logout Exit from EXEC mode
more Display file
no Delete trace hunt string/Negate a command or set its defaults
ping Send ICMP echo messages
platform Platform configuration
ptp Misc non persistent 1588 settings.
reload Reload system.
send Send a message to other tty lines
show show
terminal Set terminal line parameters
traceroute Send IP Traceroute messages
veriphy VeriPHY keyword
#

For more detailed instructions and additional information, please refer to
the Ethernet Switch Firmware Manual.

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2.5.1 Resetting the Configuration to Factory Defaults

» Press <Enter> until the Username: prompt appears.
» Log in as admin, without entering a password:

» Reload the default values:

- When the prompt returns, the system has reverted to factory defaults.

2.5.2 Setting the Device Hostname

» Change to configuration mode:

» Change your hostname to the desired value, e.g., my-device:

» Exit configuration mode:

The switch executes the commands immediately, so hostname changes the device
hostname right away as is reflected in the prompt.

2.5.3 Setting a Password for the Admin User

» Change to configuration mode:

» Set the password for the admin user (replace very-secret with a personal password):

» Exit configuration mode:

The password for the admin user is now set to very-secret.

Username: admin
Password:
#

# reload defaults
% Reloading defaults. Please stand by.
#

# configure terminal

(config)# hostname my-device

my-device(config)# exit

my-device# configure terminal

my-device(config)# username admin privilege 15 password unencrypted

very-secret

my-device(config)# exit

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2.5.4 Setting the VLAN 1 IP Address

Assign an IP address to the device on VLAN 1, which is normally sufficient for small local
area networks that use Dynamic Host Configuration Protocol, DHCP, or static IP address
allocation.

Note: IP addresses can only be assigned to VLAN interfaces.

» Enter configuration mode:

» Enter and execute configuration commands:

- The prompt will change as the interface vlan 1 command enters a configura-

tion sub-mode that allows, e.g., the configuration of the IP address.

» Exit configuration mode:

Checking the IP address

The command show ip interface brief displays all configured and active IP interfaces. The
status should be UP, unless there is no link on any port.

Checking the IP address

If DHCP negotiation has failed, the switch will assign fallback IP 172.16.1.2.

Verifying the Connectivity

Verifying connectivity via ping command

If the ping is successful, you can log in to the network via telnet/ssh or web to the
address on VLAN interface 1, 172.16.1.17 (or 172.16.1.2).

my-device# configure terminal

my-device(config)# interface vlan 1
my-device(config-if-vlan)# ip address dhcp fallback 172.16.1.2

255.255.0.0

my-device(config-if-vlan)# exit

my-device# show ip interface brief
Vlan Address Method Status

---- -------------------- -------- -----­ 1 172.16.1.17/16 DHCP UP
my-device#

my-device# ping ip 172.16.1.1
PING server 172.16.1.1, 56 bytes of data.
64 bytes from 172.16.1.1: icmp_seq=0, time=0ms
64 bytes from 172.16.1.1: icmp_seq=1, time=0ms
64 bytes from 172.16.1.1: icmp_seq=2, time=0ms
64 bytes from 172.16.1.1: icmp_seq=3, time=0ms
64 bytes from 172.16.1.1: icmp_seq=4, time=0ms
Sent 5 packets, received 5 OK, 0 bad

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2.5.5 Displaying and Saving the Configuration

You can display the current configuration of the device in the form of a virtual file called
running-config which contains the full set of commands necessary to create an identical
configuration.

The file sequence is as follows:

 hostname command

 Password for the admin user

 VLANs 1 and 42 and other items, such as Spanning Tree Protocol (STP)

 List of all port interfaces on the device, ordered by switch ID, type and port number

 VLAN interfaces 1 and 42 (only 1 has an assigned IP address)

 Line section, which specifies the characteristics for the serial console (line console 0)

or network CLI management connections (line vty x)

Note: Certain items, e.g., private SSH keys, are not displayed.

» Display the configuration settings:

Notes:

- The set of interfaces depends on hardware capabilities.

- Lines beginning with "!" are comments

my-device# show running-config
Building configuration...
hostname my-device
username admin privilege 15 password encrypted dmVyeS1zZWNyZXQ=
!
vlan 1
name default
!
spanning-tree mst name 00-01-c1-00-ad-80 revision 0
! [...]
!
interface GigabitEthernet 1/1
!
interface GigabitEthernet 1/2
!
! [...]
!
interface 2.5GigabitEthernet 1/1
!
interface 2.5GigabitEthernet 1/2
!
interface vlan 1
ip address dhcp fallback 172.16.1.2 255.255.0.0
!
line console 0
!
line vty 0
!
! [...]
!
end

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All interfaces except GigabitEthernet 1/1 (switch 1, port 1) are set to default, so nothing is
displayed for them. Generally only the non-default configuration is displayed.

» Save the configuration to the startup-config file:

» List the files in the Flash file system:

» Check the contents of the designated file.

my-device# copy running-config startup-config
Building configuration...
% Saving 1326 bytes to flash:startup-config

my-device# dir
Directory of flash:
r- 1970-01-01 00:00:00 648 default-config
rw 1970-01-03 18:21:28 1326 startup-config
2 files, 1974 bytes total.

my-device# more flash:startup-config
hostname my-device
username admin privilege 15 password encrypted dmVyeS1zZWNyZXQ=
!
vlan 1
name default
[...]

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3 Functional Description

3.1 Power Supply

The NL31 is supplied via a power inlet connector at the front panel.

Table 1. Connector types – power supply (4-pin M12 A-coded)

Table 2. Pin assignment - power supply (4-pin M12 A-coded)

Table 3. Signal mnemonics – power supply

3.2 Isolation Voltages

The isolation groups are defined as follows:

 1 = Power in, GND

 2 = Logic GND / Shield, SERVICE

 3 = ETH1 to ETH12, PoE power in

- ETH3 to ETH12 are connected to power supply PoE in and are therefore not

isolated from each other.

Table 4. Isolation voltages (with A- or/and D-coded connectors)

Table 5. Isolation voltages (with X-coded connectors)

Connector Type

On NL31 4-pin plug

e.g., CONEC SAL-12-ISW4/A6090

Mating 4-pin receptacle

1PWR_IN

2PWR_GND

3PWR_GND

4PWR_IN

Signal Direction Function

PWR_GND In GND

PWR_IN In Power in

See Chapter 2.3.4 Connecting the Power Supply on page 21 for further information
about power supply connection.

Group

Number

12

2 1500 V AC

3 1500 V AC 1500 V AC

Group

Number

12

2 1500 V AC

3 1500 V AC 500 V AC

2

4

13

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3.3 Ethernet

The NL31 supports:

 Two uplink ports:

- ETH1 and ETH2 or

- ETH25 and ETH26 (fiber ports, optional)

 Mechanical connection of Ethernet ports ETH1 to ETH12: push-pull variant (Harting

concept)

3.3.1 PoE+ Power Supply

To increase the available PoE power, you can connect an external PoE+ power supply,
e.g., MEN’s device PU28.

The NL31 supports:

 Input voltage: +52 V DC

 Input current: 18 A max.

MEN’s PU28 delivers 500 W PoE power. This increases the total available PoE power to
590 W (load sharing with internal PoE power supply).

Note: Define the total available PoE power in the switch firmware.

Table 6. Connector types – 5-pin, M12, L-coded

Table 7. Pin assignment - power supply (5-pin M12 L-coded)

Table 8. Signal mnemonics – power supply

See the switch firmware user manual:

www.men.de/products/nl31/#doc

Connector Type

On NL31 5-pin plug

e.g., Phoenix Contact SACC-CI-M12MSL-4FE-L180 THR GR

Mating 5-pin receptacle

1PWR_IN

2PWR_GND

3PWR_GND

4PWR_IN

FE -

Signal Direction Function

PWR_GND In GND

PWR_IN In Power in

2

41

3

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3.3.2 Front Connection

3.3.2.1 Fast Ethernet D-Coded

Note: If the NL31 is equipped with D-coded Ethernet connectors, there are always two

A-coded connectors to allow gigabit uplink:

Table 9. Connector types – Ethernet (4-pin, M12, D-coded)

Note: For railway rolling stock installation, the mating connector must be an approved

crimp connector.

Table 10. Pin assignment – Ethernet (4-pin M12)

Table 11. Signal mnemonics – Ethernet

See Figure 1, Front interfaces on page 11 for the position of the connectors.

Connector Type

On NL31 4-pin M12 receptacle, D-coded

e.g., Conec SAL-12D-IKHW4/A6090

Mating 4-pin M12 plug D-coded

e.g., Harting Electronics 21 03 881 1430

1TX+

2RX+

3TX-

4RX-

Signal Direction Function

RX+/- in Differential pair of receive data lines for 10BASE-T or

100BASE-T

TX+/- out Differential pair of transmit data lines for 10BASE-T

or 100BASE-T

3

1

2

4

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3.3.2.2 Gigabit Ethernet A-coded

Table 12. Connector types – Ethernet (8-pin M12)

Note: For railway rolling stock installation, the mating connector must be an approved

crimp connector.

Table 13. Pin assignment – Ethernet (8-pin M12)

Table 14. Signal mnemonics – Ethernet

Connector Type

On NL31 8-pin M12 receptacle A-coded

e.g., CONEC SAL-12-IKHW8/A6090

Mating 8-pin M12 plug A-coded

e.g., Harting Electronics 21 03 821 1830

1000BASE-T 10/100BASE-T

1BI_DC-

2 BI_DD+

3 BI_DD-

4BI_DA- TX-

5BI_DB+ RX+

6BI_DA+ TX+

7BI_DC+ -

8BI_DB- RX-

Signal Direction Function

BI_Dx+/- in/out Differential pairs of data lines for 1000BASE-T

RX+/- in Differential pair of receive data lines for 10/100BASE-T

TX+/- out Differential pair of transmit data lines for 10/100BASE-T

2

4

1

3

5

6

7

8

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3.3.2.3 Gigabit Ethernet X-Coded

Table 15. Connector types – Ethernet M12

Note: For railway rolling stock installation, the mating connector must be an approved

crimp connector.

Table 16. Pin assignment – Ethernet (8-pin M12)

Table 17. Signal mnemonics – Ethernet

Connector Type

On NL31 8-pin M12 receptacle, X-coded

e.g., Conec SAL - 12X - IKW8

Mating 8-pin M12 plug, X-coded

e.g. Harting Electronics 21 03 881 1830

1000BASE-T 10/100BASE-T

1BI_DA+ TX+

2BI_DA- TX-

3BI_DB+ RX+

4BI_DB- RX-

5 BI_DD+

6 BI_DD-

7BI_DC-

8BI_DC+

Signal Direction Function

BI_Dx+/- in/out Differential pairs of data lines for 1000BASE-T

RX+/- in Differential pair of receive data lines for 10/100BASE-T

TX+/- out Differential pair of transmit data lines for 10/100BASE-T

2

4

1

3

5

6

7

8

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3.3.2.4 Q-ODC (optional)

The NL31 supports:

 Wire speed:

- ETH25: 1 Gbit/s

- ETH26: 1 Gbit/s (up to 2.5 Gbit/s)

Table 18. Connector types – Q-ODC

Table 19. Pin assignment – Q-ODC

Table 20. Signal mnemonics – Q-ODC

See Figure 1, Front interfaces on page 11 for the position of the connectors.

Connector Type

On NL31 Q-ODC-2 receptacle

e.g., Huber/Suhner PC02-QOS4-LCMD-O219T-0.50-MM

Mating Q-ODC-2 plug

1 TX+/- / RX+/-

Signal Direction Function

RX+/- in Data receive differential pair

TX+/- out Data transmit differential pair

1

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3.3.3 Power over Ethernet (PoE)

Power over Ethernet startup behavior is controlled by management firmware.

Table 21. Power over Ethernet classes

3.3.4 Ethernet Status LEDs

Table 22. Ethernet status LEDs

3.3.5 Ethernet Switch

3.3.5.1 Default Configuration

Table 23. Default switch configuration

Class

Guaranteed Power

at PD Input

Guaranteed Power

at PSE Output

0 0.44 W to 12.96 W 15.4 W

1 0.44 W to 3.84 W 4.0 W

2 3.84 W to 6.49 W 7.0 W

3 6.49 W to 12.95 W 15.4 W

4 12.95 W to 25.5 W 30.0 W

A combination of different classes is also possible. See Chapter 1.3

Technical Data on page 13 for maximum output power.

See Figure 1, Front interfaces on page 11 for the position of the LEDs.

Appearance Label Color Function

L Green Indicates the link status

 On: Link up

 Off: No link

 Blinking: n/a

A Yellow Indicates Ethernet activity

 On: n/a

 Off: No activity

 Blinking: Transmit/Receive activity

Setting Default

Base address 192.168.0.1

Netmask 255.255.255.0

Opening of ports All ports will be opened after the system is

started.

Gateway 0.0.0.0

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3.4 RS232 (Console)

The NL31 supports:

 Local system management via serial console (RS232).

 Configuration and maintenance.

- An external dongle can also be connected to the service port for switch con-

figuration.

3.4.1 Front Connection

Table 24. Connector types – RS232 M12

Note: For railway rolling stock installation, the mating connector must be an approved

crimp connector.

Table 25. Pin assignment – RS232 M12

Table 26. Signal mnemonics – RS232 M12

See Chapter 2.4.2 Command Line Interface (CLI) on page 22 for connection
parameters.

Connector Type

On NL31 5-pin M12 receptacle A-coded

e.g., CONEC SAL-12-IKHW5/A6090

Mating 5-pin M12 plug A-coded

e.g., Harting Electronics 21 03 821 1530

1TX

2VCC_DONGLE

3GND

4NC

5RX

Signal Direction Function

GND - Digital ground

RX/TX in/out RS232 transmit/receive differential pair

VCC_DONGLE Fuse protected power supply +3.3V

NC Not connected

24

1

3

5

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3.5 Status LEDs

Table 27. General status LEDs at front panel

Appearance Label Color Function

1 Green Indicates power status

 On: Supply voltage is available

 Off: Supply voltage is not available

2 Yellow Indicates switch operation

 On: Switch is operating normally

 Off: Switch is not operating normally

3 Green Indicates PoE power status

 On: External PoE supply voltage is

available

 Off: External PoE supply voltage is not

available

Switch Firmware

20NL31-00 E1



2019-02-13

Page 37

4 Switch Firmware

The NL31 is controlled via the switch firmware. No additional software is required.

See the switch firmware user manual:

www.men.de/products/nl31/#doc

Maintenance

20NL31-00 E1



2019-02-13

Page 38

5Maintenance

5.1 Cleaning

Clean the NL31 once a year. Remove light dirt with a dry cloth. Remove persistent dirt
only with a mild detergent and a soft cloth.

» Remove dirt and dust from the cooling fins.

5.2 Updating the Switch Firmware

You can update the switch firmware 14ETSW-02.

Take care that no liquid gets inside the NL31 and the labels are not
damaged.

See the switch firmware user manual:

www.men.de/products/nl31/#doc