westermo Viper 20A Series 20 Port Ethernet Switch User Guide

Table of Contents
1. General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1. Legal Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2. About This Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.3. Software Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.4. License and Copyright for Included FLOSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.5. WeOS Management Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Safety and Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1. Warning Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.2. Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.3. Care Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.4. Product Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.5. Compliance Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.5.1. Agency Approvals and Standards Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.5.2. EN/IEC/UL 61010-2-201 Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.5.3. FCC Part 15.105 Class A Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.5.4. Simplified Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3. Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.1. Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.2. Available Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.3. Hardware Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.4. Connector Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.5. LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 3.6. Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.1. Wall Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.2. Protective Earth Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.3. Connection of Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.4. Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.5. Replacement of Product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.6. EN 45545-2 Mounting Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 5.1. Interface Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 5.2. Type Tests and Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6. Revision Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Viper 20A Series

1. General Information
1.1. 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 .
1.2. 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.
1.3. Software Tools Related software tools are available at https://www.westermo.com/support/productsupport.
1.4. 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.
1.5. 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.

Viper 20A Series

2. Safety and Regulations

2.1. 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
Indicates a potentially hazardous situation

Consequence personal injury
Possible death or major injury

Consequence material damage
Major damage to the product

WARNING

Indicates a potentially hazardous situation

Minor or moderate injury

Moderate damage to the product

CAUTION

Provides information in order to avoid misuse of the product, confusion or misunderstanding

No personal injury

Minor damage to the product

NOTICE

Used for highlighting general, but important information

No personal injury

Minor damage to the product

NOTE
Table 1. Warning levels

Viper 20A Series

2.2. 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.
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.
Refer to chapter Compliance Information to see the required level of qualified service personnel according to safety standards.
Before energising and connecting communication cables to the product, 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, disconnect the product from the power supply and all other communication ports before disconnecting the protective earthing conductor.
HAZARDOUS VOLTAGE Do not open an energised product. Hazardous voltage may occur when connected to a power supply.
PROTECTIVE FUSE The power supply wiring must be sufficiently fused. The fuse must be IEC 60127 certified and rated for T1.6 A 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.

Viper 20A Series

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 chapter Interface Specifications.

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 chapter Interface Specifications.

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).

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.
2.3. 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.

Viper 20A Series

2.4. 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.
Proper disposal of the product helps minimize hazardous substances and prevents potential negative impacts on both the environment and human health.

Figure 1. WEEE symbol for treatment of product disposal 2.5. Compliance Information

2.5.1. Agency Approvals and Standards Compliance

Type Climate
EMC
Mechanical (Shock and vibration) Insulation (Coordination and test) Fire protection
Software Safety

Approval/Compliance
· 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
· EN/IEC 61000-6-2, Immunity industrial environments · EN/IEC 61000-6-4, Emission industrial environments · EN 50121-4/IEC 62236-4, Railway signalling and telecommunications
apparatus · 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-058942
· EN 61373 category 1, class A and B · EN 60068-2-27 20 g, 11 ms and 100 g, 6 ms
· EN 50124-1, Railway applications Insulation coordination · EN 50155/IEC 60571, Railway applications – Electronic equipment used on
rolling stock
· EN 45545-2, Fire protection on railway vehicles · NFPA 130, Fire protection for fixed guideway transit and passenger rail
system
· EN 50657:2017 Software Onboard Rolling Stock (Basic Integrity)
· EN/IEC/UL 61010-1, -2-201, Safety requirements for electrical equipment for measurement, control, and laboratory use

Table 2. Agency approvals and standards compliance

Viper 20A Series

2.5.2. EN/IEC/UL 61010-2-201 Notice This product has been tested and found compliant to EN/IEC/UL 61010-2-201, Safety requirements for electrical equipment for measurement, control, and laboratory use. In accordance with the definitions of the standard, this product shall be handled by skilled service personnel.
2.5.3. 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.
2.5.4. 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

Viper 20A Series

3. Product Description

3.1. Product Description The Viper-20A series consists of managed 20 port routing switches optimised for the needs of the railway rolling stock market. Gbps ports cope with high bandwidth devices such as access points and NVRs (Network Video Recorders).
The Viper-20A 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 and push-pull locking 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 series is very well suited for deployment in any other application with severe operating conditions and tough environments, for instance in the mining industry.

3.2. Available Models All switches are managed. Viper x20A is used when referring to both models 120A and 220A.

Art. no. 3635-0910 3635-1210 3635-0920 3635-1220

Model Viper-120A Viper-120A-T4G Viper-220A Viper-220A-T4G

Table 3. Available Viper-x20A models

SW Gbps ports

–

Viper 20A Series

3.3. Hardware Overview

M12 Torque 0.6±0,1 Nm / 0,45±0,1 lbft

X15

X10

X16

X11

X17

USB

RSTP

FRNT

6
CON

X12

X18

X13

X19

DC X8

X14

X20

24-110 V DC

1000BASE-T

No. 1 3 5 7

4
Description LED indicator Gbps port Console port Protective earth connection

No. 2 4 6

3
Description 100 Mbps port Power connection USB port

Figure 3. Location of interface ports and LED indicators

Viper 20A Series

3.4. Connector Pinout

Signal

Illustration

no.

+DC1

+DC2

-COM

The product supports redundant power connection. The positive inputs are +DC1 and +DC2. The negative input for both supplies is -COM

Table 4. Power connector, male, A-coded

Pin no. 1 2 3 4 5

Signal NCa. TX RX NCa. GND

Illustration

a.No Connect. Do not connect.
Table 5. Console connector, female, B-coded

Pin no. 1 2 3 4 5

Signal DN VBUS NCa. DC GND

Illustration

a.No Connect. Do not connect.
Table 6. USB connector, female, A-coded

Viper 20A Series

Signal

Illustration

no.

TD+

RD+

TD-

RD-

MDI, MDI-X and auto MDI/MDI-X modes are supported. The table shows signals in MDI mode.
Table 7. 100 Mbps Ethernet connector, female, D-coded

Pin no. 1 2 3 4 5 6 7 8

Signal DA+ DADB+ DBDD+ DDDCDC+

Illustration

8 7

1 2

6 5

3 4

Table 8. Gbps connector, female, X-coded

Viper 20A Series

3.5. LED Indicators

LED

Status

OFF

GREEN

RED

BLINK

RSTP FRNT
DC X1 to X20

OFF GREEN BLINK OFF GREEN RED FLASH OFF GREEN RED OFF GREEN GREEN FLASH YELLOW

Table 9. LED indicators

Description
Product has no power
All OK, no alarm condition
Alarm condition, or until product has started up. (Alarm conditions are configurable, see WeOS4 Management Guide)
Location indicator (“Here I am!”). Activated when connected to WeConfig tool, or upon request from web or/and CLI. RED BLINK during boot indicates pending cable factory reset.
RSTP disabled
RSTP enabled
Product selected as RSTP/STP root switch
FRNT disabled
FRNT OK
FRNT error
Product configured as FRNT focal point
Product has no power
Power OK on DC1 and DC2
Power failure on DC1 or DC2
No link
Link established
Data traffic indication
Port alarm, or port is set in blocking state by link redundancy protocol

Viper 20A Series

3.6. Dimensions Dimensions are stated in mm.

Grounding point

Screw M5x10

178

6 1 3 4

164 ±0,5

7 ±0,5

160 56 ±0,3

Figure 4. Dimensional drawing

+0,2 7,2 – 0,5

Viper 20A Series

4. Installation
4.1. 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.

M12 Torque 0.6±0,1 Nm / 0,45±0,1 lbft

X15

X10

X16

X11

X17

USB

RSTP

FRNT

X12

X18

X13

X19

CON

DC X8

X14

X20

24-110 V DC

RING

Figure 5. Wall mounting
4.2. Protective Earth Connection For correct function, the earth connection needs to be properly connected to a designated PE rail. Torx: T25 and torque: 3.2 Nm.

Viper 20A Series

X15

X10

X16

X11

X17

M12 Torque 0.6±0,1 Nm / 0,45±0,1 lbft

USB

RSTP

FRNT

X12

X18

X13

X19

CON

DC X8

X14

X20

24-110 V DC

RING

Figure 6. Earth connection
4.3. 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.

PROTECTIVE FUSE The power supply wiring must be sufficiently fused. The fuse must be IEC 60127 certified and rated for T1.6 A 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.

Viper 20A Series

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.
4.4. 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.
4.5. 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 [16]. 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.
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.
4.6. 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.

Viper 20A Series

5. Specifications

5.1. Interface Specifications

DC, Power port Rated voltagea. Operating voltageb. Rated current Rated frequency Inrush current

24 to 110 VDC 16.8 to 143 VDC (14.4 VDC for 100 ms and 154 VDC for 1 s) Max 670 mA at 24 VDC, max 160 mA at 110 VDC DC Viper-x20 units: 100 mA²s at 24 VDC, 140 mA2s at 110 VDC

Viper-x20-T4G units: 110 mA2s at 24 VDC, 140 mA2S at 110 VDC

Startup current

Max 1,37 A at 16.8 VDC

Polarity

Reverse polarity protected

Redundant power input Yes

Isolation

To all other ports

Circuit type

Secondary circuit hazardous voltage, OVC II

Connector

4-pin, male, M12, A-coded, recommended Westermo cables: 3146-1106 for 1.5 m, 3146-1107 for 5 m 3146-1107 for 5 m

Cable size

M12, recommended power cable area 0.5 mm² (minimum 0.25 mm²), which correlates to AWG 21 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

a.Also referred to as nominal voltage in EN/IEC/UL 61010-1 b.Also referred to as nominal voltage in EN/IEC/UL 61010-1

Viper 20A Series

100 Mbps portsa.

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

a.100 Mbps ports are: X1-X20 on Viper-x20A X1-X5, X9-X13, X15-X20 on Viper-x20A-T4G

b.750 VDC after damp heat, according to EN 50155

Gbps portsa.

Electrical specification

IEEE std 802.3

Data rate

10 Mbps, 100 Mbps, 1000 Mbps, manual or auto

Duplex

Full or half, manual or auto

Circuit type

TNV-1

Transmission range

Up to 100 m with CAT5e cable or better

Isolation

2250 VDC to all other portsb.

Connector

8-pin, female, M12, X-coded

Shielded cable

Shielded cable CAT5e or better is recommended

Conductive chassis

Yes

FRNT reconfiguration time

Typically below 20 ms

a.Gbps ports are: X6-X8, X14 on Viper-x20A-T4G b.750 VDC after damp heat, according to EN 50155

Viper 20A Series

USB port Electrical specification Data rate Maximum supply current Circuit type Isolation
Connector

USB 2.0 host interface
Up to 480 Mbps (high-speed mode)
200 mA
SELV
To all Ethernet and DC ports No isolation to CON or protective earth
5-pin, female, M12, A-coded, recommended Westermo USB plug 3641-0190

Console port Electrical specification Data rate Data format Circuit type Isolation
Connector

RS-232
115.2 kbit/s
8 data bits, no parity, 1 stop bit, no flow control
SELV
To all Ethernet and DC ports No isolation to USB or protective earth
5-pin, female, M12, B-coded, recommended Westermo cables: 1211-2215 (serial port) or 1211-4073 (USB)

Viper 20A Series

5.2. Type Tests and Environmental Conditions

Environmental phenomena ESD Fast transients
Surge

Basic standard
EN 61000-4-2

Description Enclosure

EN 61000-4-4 EN 61000-4-5

Power port Signal ports Earth port Power port

Pulsed magnetic field
Radiated RF immunity

Ethernet port EN 61000-4-9 Enclosure
EN 61000-4-3 Enclosure

Conducted RF immunity

EN 61000-4-6 Power port Ethernet ports

Earth port

Radiated RF emission

CISPR 16-2-3
ANSI C63,4 (FCC Part 15)

Enclosure

Conducted RF emission

CISPR 16-2-1

Power port Ethernet ports

Dielectric strength EN 50155

Power port to all other ports

Ethernet ports to all other ports

Gbps Ethernet ports to all other ports

a.750 VDC after damp heat, according to EN 50155

Test levels
Contact: ±6 kV Air: ±8 kV ± 2 kV
L-E: ± 2 kV, 42 , 0.5 µF, 1.2/50 µs L-E: ± 1 kV, 12 , 9 µF, 1.2/50 µs L-L: ± 2 kV, 42 , 0.5 µF, 1.2/50 µs L-L: ± 0.5 kV, 2 , 18 µF, 1.2/50 µs L-E: ± 2 kV, 2 300 A/m
20 V/m at (80 MHz to 2 GHz) 10 V/m at (2-6 GHz) 1 kHz sine, 80% AM 10 V, 80% AM, 1 kHz; (0.15-80) MHz
EN 61000-6-4 (30-6000 MHz) EN 61000-6-4 (30-6500 MHz)
EN 61000-6-4 EN 61000-6-3 2250 VDC, 1 min
2250 VDC, 1 mina.
2250 VDC, 1 mina.

Table 10. EMC and electrical conditions

Viper 20A Series

Environmental phenomena

Basic standard

Description

Test levels

Temperatures

EN 60068-2-1 EN 60068-2-2

Operational
Storage and transport

-40 to +70°C (-40 to +158°F)a.,b. -55 to +85°C (-67 to +185°F)

Humidity

EN 60068-2-30

Operational
Storage and transport

5-95 % relative humidity

Altitude

Operational

2000 m/80 kPa

Service life

Operational

20 years according to IEC/TR 62380

MTBF

MILHDBK-217F2, GB, 25°C (+77°F)

Viper-x20A: 530,500 h Viper-x20A-T4G: 522,000 h

Vibration

IEC 60068-2-6 Operational (sine)

2 g rms 5-500 Hz, 5 sweeps

IEC 60068-2-64 (random)

Non-operational 11.44 m/s² rms 5-150 Hz, 5 hours

long life

2.3 m/s² rms 5-2000 Hz, 1.5 hours

simulation

Shock

IEC 60068-2-27

Operational

10 g, 30 ms, half sine 20 g, 11 ms, saw tooth 100 g, 6 ms, half sine

Weight

1.7 kg

Degree of protection

EN 60529

Enclosure

IP67

Cooling

Convection

Overvoltage category

EN/IEC/UL 61010-1

OVC II

Pollution degree

EN/IEC/UL 61010-1

PD3 macro environment and PD2 micro environmentc.

EN 50124-1

PD2

Location

EN/IEC/UL 61010-1

Outdoor, wet locations

IEEE 1478

Class 1, condition E4. Indoor

a.Refer to “Safety and Regulations” chapter regarding touch temperature b.Operational at +85°C for a limited time c.Installation and maintenance shall be made under controlled environments.

Table 11. Environmental and mechanical conditions

Viper 20A Series

6. Revision Notes

Revision Rev. O
Rev. N

Date 2023-03

Rev. M Rev. L

2023-01 2022-05

Rev. K

2022-01

Rev. J Rev. I Rev. H

2021-12 2021-10 2021-05

Rev. G Rev. F Rev. E

2020-1 2019-09 2019-06

Change description
5.2 Type Tests and Environmental Conditions; Dialectric strength updated to EN 50155
2.5.1 Agency Approvals and Standards Compliance; UL added to EN/IEC 61010-1 and EN/IEC 61010-2-201, 2.5.2 UL added to EN/IEC 61010-2-210 Notice, 5.1 Interface Specifications; UL added to EN/IEC 61010-1, operating voltage updated, 5.2 Type Tests and Environmental Conditions; UL added to EN/IEC 61010-1, Vibration/ Non-operational long life simulation updated
5.1 Interface specification updated (USB port)
1.3 Software Tools; link updated, 3.3 Hardware Overview; illustration updated, 3.6 Dimensions; illustration updated, 4.1 Wall Mounting; illustration updated, 4.2 Protective Earth Connection; torque added and illustration updated.
2.2 Safety Information updated (Warning – Safety during installation), 2.5.1. Agency Approvals and Standards Compliance (Software plus Safety added), 2.5.2 EN/IEC/UL 61010-2-210 Notice added, 5.2 Type Tests and Environmental Conditions updated (UL added to EN/IEC 61010-1)
5.1 Interface Specification updated (DC Power port; operating voltage)
2.5.1 Agency Approvals and Standards Compliance updated (Emark).
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, 3.1. Product Description updated, 3.4. Connector Pinout, illustration for table 5 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).
2.6.1 Agency Approvals and Standards Compliance – references to SBB requirements and ÖBB removed.
2.6.1 Agency Approvals and Standards Compliance updated with E-mark
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

Viper 20A Series

Revision Rev. D

Date 2018-12

Rev. C Rev. B

2017-09 2017-07

Rev. A

2017-05

Change description
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, 2.6.3 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 specification updated with inrush current, 5.2 Type Tests and Environmental Conditions – enclosure updated, end page updated
2.6.1 Mechanical data updated, 3.6 Dimensional drawing updated, 5.1 Transmission range for Gbps ports updated, 5.2 Radiated + Conducted RF emission updated, Enclosure updated
New chapter (2.1 Warning levels chapter), Shock and NFPA 130 updated (2.6.1 Agency approvals updated), text updated (3.1 Product description), inrush current updated (5.1 Interface specifications), service life, shock and operating temperature updated (5.2 Type Tests and environmental conditions).
First issue of user guide

Viper 20A Series

Westermo · Metallverksgatan 6, SE-721 30 Västerås, Sweden Tel +46 16 42 80 00 Fax +46 16 42 80 01 E-mail: info@westermo.com www.westermo.com
6641-22531 REV.O 2025 06 @ Westermo Network Technologies, Sweden

Documents / Resources

westermo Viper 20A Series 20 Port Ethernet Switch [pdf] User Guide
Viper 20A Series, Viper 20A Series 20 Port Ethernet Switch, 20 Port Ethernet Switch, Ethernet Switch, Switch

References

User Manual

westermo Viper 20A Series 20 Port Ethernet Switch User Guide

Viper 20A Series 20 Port Ethernet Switch

Specifications

Interface Specifications

Type Tests and Environmental Conditions

Product Information

Product Usage Instructions

Installation

Configuration

Maintenance

FAQ

Q: Where can I find technical support for the Viper 20A
Series?

Q: How do I reset the switch to factory settings?

Documents / Resources

References

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