westermo Viper 20A-PoE Series 20-Port Ethernet M12 switches with Power over Ethernet User Guide

: June 6, 2024
: westermo

Table of Contents

General Information
Safety and Regulations
Product Description
Installation
Specifications
Revision Notes
References
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westermo Viper 20A-PoE Series 20-Port Ethernet M12 switches with Power over Ethernet User Guide

General Information

Legal Information

The contents of this document are provided “as is”. Except as required by applicable law, no warranties of any kind are made in relation to the accuracy and reliability or contents of this document, either expressed or implied, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. Westermo reserves the
right to revise this document or withdraw it at any time without prior notice.

Under no circumstances shall Westermo be responsible for any loss of data or income or any special, incidental, and consequential or indirect damages howsoever caused.

More information about Westermo can be found at www.westermo.com.

About This Guide

This guide is intended for installation engineers and users of the Westermo products.

It includes information on safety and regulations, a product description, installation instructions and technical specifications.

Software Tools

Related software tools are available at www.westermo.com/support/software- tools.

License and Copyright for Included FLOSS

This product includes software developed by third parties, including Free/Libre Open Source Software (FLOSS). The specific license terms and copyright associated with the software are included in each software package respectively. Please visit the product web page for more information.

Upon request, the applicable source code will be provided. A nominal fee may be charged to cover shipping and media. Please direct any source code request to your normal sales or support channel.

WeOS Management Guide

This product runs WeOS 4 (Westermo Operating System). Instructions for quick start, configuration, factory reset and use of USB port are found in the WeOS Management Guide at www.westermo.com.

Safety and Regulations

Warning Levels

Warning signs are provided to prevent personal injuries and/or damages to the product. The following levels are used:

Level of warning| Description| Consequence personal injury| Consequence material damage
---|---|---|---

WARNING| Indicates a potentially hazardous situation| Possible death or major injury| Major damage to the product

CAUTION| Indicates a potentially hazardous situation| Minor or moderate injury| Moderate damage to the product

NOTICE| Provides information in order to avoid misuse of the product, confusion or misunderstanding| No personal injury| Minor damage to the product

NOTE| Used for highlighting general, but important information| No personal injury| Minor damage to the product

Table 1. Warning levels

Safety Information

Before installation:

Read this manual completely and gather all information available on the product. Make sure it is fully understood. Check that your application does not exceed the safe operating specifications for the product.

WARNING – SAFETY DURING INSTALLATION

The product must be installed and operated by qualified service personnel and installed into an apparatus cabinet or similar, where access is restricted to service personnel only.

During installation, ensure a protective earthing conductor is first connected to the protective earthing terminal (only valid for metallic housings). Westermo recommends a cross-sectional area of at least 4 mm2.

Note that this product can be connected to two different power sources.
Upon removal of the product, ensure that the protective earthing conductor is disconnected last.

WARNING – HAZARDOUS VOLTAGE

Do not open an energised product. Hazardous voltage may occur when connected to a power supply.

WARNING – PROTECTIVE FUSE

The power supply wiring must be sufficiently fused. The fuse must be IEC
60127 certified and rated for T6A (HV models) or T10A (LV models) and
250 V.

It must be possible to disconnect manually from the power supply. Ensure
compliance to national installation regulations.

This product has no internal fuse and should be connected via an external
fuse for protection.

WARNING – REDUCE THE RISK OF FIRE

To reduce the risk of fire, use only telecommunication line cords with a cable diameter of AWG 26 or larger. Regarding power cable dimensions, see Interface Specifications.

CAUTION – CABLE TEMPERATURE RATING FOR FIELD TERMINAL WIRES

There may be a requirement on the minimum temperature rating of the
cable to be connected to the field wiring terminals, see Interface Specifications.

CAUTION – ELECTROSTATIC DISCHARGE (ESD)

Prevent electrostatic discharge damage to internal electronic parts by discharging your body to a grounding point (e.g. use a wrist strap).

CAUTION – HOT SURFACE

Be aware that the surface of this product may become hot. When it is operated at high temperatures, the external surface may exceed Touch Temperature Limit according to the product’s relevant electrical safety standard.

NOTE – MECHANICAL FORCE ON VENTILATION MEMBRANE

Do not cover or bring mechanical force to the ventilation membrane on
the back of the product.

NOTICE – ADDITIONAL EMC TYPETESTS

For additional EMC typetests with powering via a CDN or similar high
inductive filters, please contact Westermo for correct test setup.

Care Recommendations

Follow the care recommendations below to maintain full operation of the product and to fulfill the warranty obligations:

Do not drop, knock or shake the product. Rough handling above the specification may cause damage to internal circuit boards.
Use a dry or slightly water-damp cloth to clean the product. Do not use harsh chemicals, cleaning solvents or strong detergents.
Do not paint the product. Paint can clog the product and prevent proper operation.

If the product is used in a manner not according to specification, the protection provided by the equipment may be impaired.

If the product is not working properly, contact the place of purchase, the nearest Westermo distributor office or Westermo technical support.

Product Disposal

This symbol means that the product shall not be treated as unsorted municipal waste when disposing of it. It needs to be handed over to an applicable collection point for recycling electrical and electronic equipment.

By ensuring the product is disposed of correctly, you will help to reduce hazardous substances and prevent potential negative consequences to both the environment and human health, which could be caused by inappropriate disposal.

Figure 1. WEEE symbol for treatment of product disposal

Compliance Information

Agency Approvals and Standards Compliance

Type	Approval/Compliance
Climate	EN 50155 class OT4 / IEC 60571 class TX, Railway applications –

Electronic equipment used on rolling stock
IEEE 1478 class 1, condition E4 (incl Salt Mist), Environmental conditions for transit rail car electronic equipment
EMC| EN/IEC 61000-6-2, Immunity industrial environments
EN/IEC 61000-6-4, Emission industrial environments
EN 50121-3-2/IEC 62236-3-2 Railway applications – Rolling stock – apparatus
Tested and verified for Class S1, DB EMC Regulation 06, Commodity team Radio compatibility in VDB Rev 1.0 (Shunting Radio)
Tested and verified for FCC part 15b class A (CFR 47)
E-Mark, Road Vehicles, E1 10R-058942a
Mechanical (Shock and vibration)| EN 61373 category 1, class A and B
EN 60068-2-27 20 g, 11 ms and 100 g, 6 ms
Insulation (Coordination and test)| EN 50124-1, Railway applications – Insulation coordination
EN 50155/IEC 60571, Railway applications – Electronic equipment used on rolling stock
Fire protection| EN 45545-2, Fire protection on railway vehicles
NFPA 130, Fire protection for fixed guideway transit and passenger rail system

Applicable only for Viper-x20A-P8-LV and Viper-x20A-T4G-P8-LV

Table 2. Agency approvals and standards compliance

FCC Part 15.105 Class A Notice

This product has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules.

These limits are designed to provide reasonable protection against harmful interference when the product is operated in a commercial environment.

This product generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the user manual, may cause harmful interference to radio communications. Operation of this product in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at the users own expense.

Simplified Declaration of Conformity

Hereby, Westermo declares that this product is in compliance with applicable EU directives and UK legislations. The full declaration of conformity and other detailed information is available at www.westermo.com/support/product- support.

Figure 2. The European Conformity and the UK Conformity Assessment markings

Product Description

The Viper-20A-PoE series consists of of managed 20 port routing switches optimised for the needs of the railway rolling stock market. PoE ports offer effective powering of enddevices. Gbps ports cope with high bandwidth devices such as access points and NVRs (Network Video Recorders).

The Viper-20A-PoE series is designed to withstand the tough environment on- board trains, exposing the switch to constant vibration, extreme temperatures, humidity and a demanding electrical environment.

A GORE-TEX® membrane prevents internal condensation. Threading integrated in chassis provides for additional vibration resistance. High-level isolation between all interfaces enables direct connectivity to vehicle auxiliary power and protects against overvoltage and flashover. IP67 protection prevents ingress of water and dust. An overall optimised design results in an extremely compact package in combination with very high MTBF for easy integration and low lifecycle cost.

Thorough type testing at independent ISO/IEC 17025 and ILAC MRA certified labs, accredited to a wide range of standards, show that the Viper series fulfills EN 50155 and other requirements. The state-of-the-art Westermo production facility ensures the quality of each individual unit, e.g. through temperature cycling burn-in testing.

The WeOS operating system offers an extensive suite of IP networking features for resilient and flexible networks, e.g. the FRNT ring protocol with very fast failover. The powerful layer 3 routing capability is very useful for separating networks in complex applications. The backup device accessory matches the Viper in robustness and offers easy configuration update and backup.

Meeting the requirements of the railcar market, the Viper-20A-PoE series is very well suited for deployment in any other application with severe operating conditions and tough environments, for instance in the mining industry.

Available Models

All switches are managed and have eight PoE ports. Viper x20A-PoE is used when referring to both models 120A-PoE and 220A-PoE.

Art. no.| Model| Software| Gbps ports| HV| LV
---|---|---|---|---|---
3635-1010| Viper-120A-P8-HV| L2| –| 48 – 110 V|
3635-1310| Viper-120A-T4G-P8-HV| L2| 4| 48 – 110 V|
3635-1110| Viper-120A-P8-LV| L2| –| | 24 – 38 V
3635-1410| Viper-120A-T4G-P8-LV| L2| 4| | 24 – 38 V
3635-1020| Viper-220A-P8-HV| L3| –| 48 – 110 V|
3635-1320| Viper-220A-T4G-P8-HV| L3| 4| 48 – 110 V|
3635-1120| Viper-220A-P8-LV| L3| –| | 24 – 38 V
3635-1420| Viper-220A-T4G-P8-LV| L3| 4| | 24 – 38 V

Table 3. Available Viper x20A-P8 models

Hardware Overview

No.	Description	No.	Description
1	LED indicator	2	100 Mbps port
3	100 Mbps PoE port	4	Gbps ports
5	Gbps PoE port	6	Power connection
7	Console port	8	USB port
9	Protective earth connection

Figure 3. Location of interface ports and LED indicators

Connector Pinout

Pin no.| Signal|

Illustration

---|---|---
1| +DC1|
2| +DC1
3| -COM
4| -COM
The Viper-20A-PoE series has single power connection. Dual pins shall be connected to the power supply (+DC1 for positive terminal, -COM for negative terminal) in order to distribute the current over two pins.

Table 4. Power connector HV

Pin no.| Signal|

Illustration

---|---|---
1| +DC1|
2| +DC1
3| -COM
4| -COM
The Viper-20A-PoE series has single power connection. Dual pins shall be connected to the power supply (+DC1 for positive terminal, -COM for negative terminal) in order to distribute the current over two pins.

Table 5. Power connector LV

Pin no.| Signal|

Illustration

---|---|---
1| NC|
2| TX
3| RX
4| NC
5| GND

Table 6. Console connector

Pin no.| Signal|

Illustration

---|---|---
1| DN|
2| VBUS
3| NC
4| DC
5| GND

Table 7. USB connector

Pin no.| Signal|

Illustration

---|---|---
1| TD+|
2| RD+
3| TD-
4| RD-
MDI, MDI-X and auto MDI/MDI-X modes are supported. The table shows signals in MDI mode.

Table 8. 100 Mbps Ethernet connector

Pin no.| Signal|

Illustration

---|---|---
1| DA+|
2| DA-
3| DB+
4| DB-
5| DD+
6| DD-
7| DC-
8| DC+

Table 9. Gbps connector

LED Indicators

LED	Status	Description
ON	OFF	Product has no power
GREEN	All OK, no alarm condition
RED	Alarm condition, or until product has started up. (Alarm conditions are

Table 10. LED indicators

Dimensions

Dimensions are stated in mm and are regardless of model. 83

Figure 4. Dimensional drawing

Installation

Wall Mounting

The product can be wall mounted vertically or horizontally. There are four pieces of 7 mm bores for this. Use four M5, M6 or 1/4″ screws with 12 mm washers on a flat and stable surface.

Figure 5. Wall mounting

Protective Earth Connection

For correct function, the earth connection needs to be properly connected to a designated PE rail. See the figure below.

Figure 6. Earth connection

Connection of Cables

Recommended tightening torque for the M12 connectors is 0.6 Nm. All M12 connections are screw connections.

When connecting the power cable, ensure that the pins are connected correctly before tightening the power cable to the unit.

WARNING – PROTECTIVE FUSE

The power supply wiring must be sufficiently fused. The fuse must be IEC 60127 certified and rated for T6A (HV models) or T10A (LV models) and 250 V.

It must be possible to disconnect manually from the power supply. Ensure compliance to national installation regulations.

This product has no internal fuse and should be connected via an external fuse for protection.

NOTE – UNUSED CONNECTORS

Unused connectors must be covered by a protective cap (delivered with
the product), tightened to the specified torque in order to fulfill the
specified ingress protection code.

Cooling

This product relies on convection cooling. Make sure that it is installed so that the ambient temperature is within the specified temperature range. Avoid obstruction of the airflow around the product.

Replacement of Product

Disconnect all cables and unscrew the product from the wall. Mount the replacement product and reconnect all cables, observing the instructions in Connection of Cables [18]. For easy replication of the configuration of the original product, it is recommended to have the Westermo USB plug permanently connected to the USB port and move it over to the replacement product before it is powered up.

MTTR (Mean Time To Repair), i.e. time for replacement of product is: < 15 minutes.

CAUTION – HOT SURFACE

Be aware that the surface of this product may become hot. When it is operated at high temperatures, the external surface may exceed Touch Temperature Limit according to the product’s relevant electrical safety standard.

EN 45545-2 Mounting Notes

Two product can be mounted together and as a single interior non-listed group in the sense of EN 45545-2 definitions. For multiple product, the spacing requirements for interior non-listed groups must be met.

Specifications

Interface Specifications

DC, Power port

Rated voltage a| Viper-x20A-PoE LV units: 24 to 38 VDC Viper-x20A-PoE HV units: 48 to 110 VDC
Operating voltage b| Viper-x20A-PoE LV units:
16.8 to 49.9 VDC (14.4 VDC for 100 ms and 53.2 VDC for 1 s) Viper-x20A-PoE HV units:

33.6 to 143 VDC (28.8 VDC for 100 ms and 154 VDC for 1 s)

Rated current| Viper-x20A-PoE LV units: max 5.0 A at 24 VDC, max 3.2 A at 38 VDC Viper-x20A-PoE HV units: max 2.6 A at 48 VDC, max 1.1 A at 110 VDC
Rated frequency| DC
Inrush current| Viper-x20A-PoE LV units: 580 mA2s at 24 VDC, 560 mA²s at 38 VDC
Viper-x20A-PoE HV units: 200 mA2s at 48 VDC, 160 mA²s at 110 VDC
Startup current| Viper-x20A-PoE LV units: 1.8 A at 16.8 VDC Viper-x20A- PoE HV units: 750 mA at 33.6 VDC
Polarity| Reverse polarity protected
Redundant power input| No
Isolation| 2250 VDC to all other ports
Circuit type| Secondary circuit hazardous voltage, OVC II
Connector| Viper-x20A-PoE LV units:
4-pin, male, M12, T-coded, recommended Westermo cable: 3146-1109 for 5 m
Viper-x20A-PoE HV units:
4-pin, male, M12, A-coded, recommended Westermo cables: 3146-1106 for 1.5 m
3146-1107 for 5 m
Cable size| For Viper-x20A-PoE HV units:
M12, recommended power cable area 0.5 mm² (minimum 0.25 mm²), which correlates to AWG 21 or larger
For Viper-x20A-PoE LV units:
M12, recommended power cable area 1 mm² (minimum 0.75 mm²), which correlates to AWG 18 or larger
Cable dimensions depend on choice of M12 connector
Cable temperature rating| For minimum temperature rating of the cable to be connected to the field wiring terminals: -40 to +70 °C

Also referred to as nominal voltage in EN/IEC 61010-1
Also referred to as nominal input including fluctuations in EN/IEC 61010-1

100 Mbps ports, non PoE a

Electrical specification| IEEE std 802.3
Data rate| 10 Mbps, 100 Mbps, manual or auto
Duplex| Full or half, manual or auto
Circuit type| TNV-1
Transmission range| Up to 150 m with CAT5e cable or better
Isolation| 2250 VDC to all other portsb
Connector| 4-pin, female, M12, D-coded, auto MDI/MDI-X, recommended Westermo cables:
3146-1100 M12-M12 – 1 m
3146-1101 M12-M12 – 5 m
3146-1103 RJ45-M12 – 1 m
3146-1104 RJ45-M12 – 5 m
Shielded cable| Shielded cable CAT5e or better is recommended
Conductive chassis| Yes
FRNT reconfiguration time| Typically below 20 ms

100 Mbps ports, non-PoE, are:
X1-X4, X8-X10, X14-X16, X19-X20 on Viper-x20A-P8-HV/LV
X1-X4, X9-X10, X15-X16, X19-X20 on Viper-x20A-T4G-P8-HV/LV

750 VDC after damp heat, according to EN 50155

Gbps ports, non-PoE a

Gbps ports, non-PoE are: X8, X14
750 VDC after damp heat, according to EN 50155

PoE ports, 100 Mbps and Gbps a

PoE ports are:
X5-X7, X11-X13, X17-X18 on Viper-x20A-P8-HV/LV
X5, X11-X13, X17-X18 and Gbps ports X6-X7 on Viper-x20A-T4G-P8-HV/LV

750 VDC after damp heat, according to EN 50155
As delivered by Power Sourcing Equipment, i.e. the Viper-x20A-PoE switch. Power available at Powered Device is depending on the cable resistance.

NOTE
PoE ports are not isolated to each other

USB port

No isolation to CON or protective earth

Connector| 5-pin, female, M12, A-coded, recommended Westermo USB plug 3641-0190
Console port

No isolation to USB or protective earth

Connector| 5-pin, female, M12, B-coded, recommended Westermo cables: 1211-2215 (serial port) or 1211-4073 (USB)

Type Tests and Environmental Conditions

Environmental phenomena| Basic standard| Description| Test levels
---|---|---|---
ESD| EN 61000-4-2| Enclosure| Contact: ±6 kV Air: ±8 kV
Fast transients| EN 61000-4-4| Power port| ± 2 kV
Signal ports
Earth port
Surge| EN 61000-4-5| Power port| L-E: ± 2 kV, 42 Ω, 0.5 µF, 1.2/50 µs L-E: ± 0.5 kV, 12 Ω, 9 µF, 1.2/50 µs L-L: ± 2 kV, 42 Ω, 0.5 µF, 1.2/50 µs L-L: ± 0.5 kV, 2 Ω, 18 µF, 1.2/50 µs
Ethernet port| L-E: ± 2 kV, 2 Ω
Pulsed magnetic field| EN 61000-4-9| Enclosure| 300 A/m
Radiated RF immunity| EN 61000-4-3| Enclosure| 20 V/m at (80 MHz to 2 GHz)

10 V/m at (2-6 GHz)

1 kHz sine, 80% AM

750 VDC after damp heat, according to EN 50155
PoE ports are not isolated to each other, except on a functional level.
Table 11. EMC and electrical conditions

Environmental phenomena| Basic standard| Description| Test levels
---|---|---|---
Temperatures| EN 60068-2-1

EN 60068-2-2

Viper-x20A-P8-HV: 366,500 h

Viper-x20A-T4G-P8-LV: 363,000 h

Viper-x20A-T4G-P8-HV: 362,500 h

Vibration| IEC 60068-2-6

(sine)

| Operational| 2 g rms 5-500 Hz, 5 sweeps
IEC

60068-2-64

(random)

| Non-operational long life simulation| 11.44 m/s² rms 5-150 Hz, 5 hours
Shock| IEC

60068-2-27

| Operational| 10 g, 30 ms, half sine

20 g, 11 ms, saw tooth

100 g, 6 ms, half sine

Refer to “Safety and Regulations” chapter regarding touch temperature
bOperational at +85°C for a limited time
Installation and maintenance shall be made under controlled environments.
Table 12. Environmental and mechanical conditions

Revision Notes

Revision	Date	Change description
Rev. I	2021-12	5.1 Interface Specification updated (DC Power port; operating

voltage)
Rev. H| 2021-10| 2.5.1 Agency Approvals and Standards Compliance updated (E-mark).
Rev. G| 2021-05| Westermo logo updated, blue product illustrations throughout the user guide, 2.2 Safety Information – various warnings updated in accordance with General and Information Safety manual, 2.3 Care Recommendations, text updated, old chapter 2.4 Maintenance deleted, 2.5.1. Agency Approvals and Standards Compliance updated, 2.5.3 Simplified Declaration of Conformity; text and figure updated, 3.4. Connector Pinout, illustration for table 6 updated, 3.6. Dimensions, illustration updated, 4.2. Earth connection chapter added, 5.1. Interface Specifications updated (all tables),

5.2 Type Tests and Environmental Conditions updated (Altitude updated, Enclosure deleted, Overvoltage category added, Pollution degree added and Location added).

Rev. F| 2020-3| 5.1 Interface Specifications – DC, Power port, connector updated.
Rev. E| 2020-1| 2.6.1 Agency Approvals and Standards Compliance – references to SBB requirements and ÖBB removed.
Rev. D| 2019-09| 2.6.1 Agency Approvals and Standards Compliance updated with E-mark
Rev. C| 2019-06| Front page updated, 1.3 Software Tools text updated, 2.2 Safety Information: Notice – Mechanical force on ventilation membrane new information, 2.3 Care Recommendations text updated, 4.4 Replacement of Product text updated
Rev. B| 2018-12| 2.2 Safety Information updated with specific symbol for Caution – Hot surface, and text in Notice – Connect external fuse, 2.5 Environmental Protection updated to Product disposal, 2.6.1 Agency Approvals table updated, 2.6.3 Declaration of Conformity updated to Simplified Declaration of Conformity, 3.3 Hardware Overview table updated, 4.2 updated with Notice – Connect external fuse, 4.4 symbol for Caution – Hot surface updated, 5.1 Interface specifications – Gbps ports; Transmission range updated and note updated, inrush current, 5.2 Type Tests and Environmental Conditions – enclosure updated, end page updated
Rev. A| 2017-09| First issue of user guide

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Tel +46 16 42 80 00 Fax +46 16 42 80 01
E-mail: info@westermo.com
www.westermo.com