Westermo Viper-8 Series User manual

w w w. w ester m o .com
OS
Viper-8 Series
EN 50155 Managed Gigabit Routing Switch

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 ................................................................................. 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. FCC Part 15.105 Class A Notice ...................................... 8
2.5.3. 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 .................................................................... 12
3.6. Dimensions ........................................................................ 13
4. Installation .................................................................................. 14
4.1. Wall Mounting ..................................................................... 14
4.2. Protective Earth Connection .................................................. 14
4.3. Connection of Cables ........................................................... 15
4.4. Cooling .............................................................................. 16
4.5. Replacement of Product ........................................................ 16
4.6. EN 45545-2 Mounting Notes .................................................. 16
5. Specifications .............................................................................. 17
5.1. Interface Specifications ......................................................... 17
5.2. Type Tests and Environmental Conditions ................................. 19
6. Revision Notes ............................................................................ 21
2 Viper-8 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 www.westermo.com/support/software-tools.
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
This product runs WeOS 5 (Westermo Operating System). Instructions for quick start,
configuration and factory reset are found in the WeOS user documentation at
www.westermo.com.
Viper-8 Series 3

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 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
4 Viper-8 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.
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.
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 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.
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.
Viper-8 Series 5

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.
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.
6 Viper-8 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.
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
2.5. Compliance Information
2.5.1. 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 50121-4/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)
Mechanical
(Shock and
vibration)
• EN 61373 category 1, class A and B
• IEEE 1478 class 1, condition E4, including shock tests 10 g/30 ms and 20 g/11 ms in
all directions
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
Software • EN 50657:2017 Software Onboard Rolling Stock (Basic Integrity)
Safety • EN/IEC 61010-1, -2-201, Safety requirements for electrical equipment for
measurement, control, and laboratory use
Viper-8 Series 7

2.5.2. 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.
2.5.3. 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
8 Viper-8 Series

3. Product Description
3.1. Product Description
The Viper-8 series is a managed backbone routing switch optimised for the needs of the
railway rolling stock market. Gbps ports cope with high bandwidth backbone, consist ring
and end-devices.
The product 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 ensures communication between the backbone and
consist networks and offers full support for IEC 61375, including TTDP network
inauguration and TRDP realtime data protocol. The backup device accessory matches the
Viper in robustness and offers easy configuration update and backup.
3.2. Available Models
Art. no. Model Software Gbps ports
3635-2210 Viper-108-T8G L2 8
3635-2220 Viper-208-T8G L3 8
Table 2. Available Viper 8 models
NOTE - MECHANICAL FORCE ON VENTILATION
MEMBRANE
Do not cover or bring mechanical force to the ventilation membrane on
the back of the product.
Viper-8 Series 9

3.3. Hardware Overview
X5 X7
DC
CON
FRNT
RSTP
ON
USB
X1
X8
X2
X3
X4 X6
24-110 V
M12 Torque 0.6±0,1 Nm / 0,45±0,1 lbft
DC
1 2
4
5
7
6
3
Figure 3. Location of interface ports and LED indicators
No. Description No. Description
1 LED indicator 2 Gbps port (8 pcs)
3 GORE-TEX ventilation membrane on
the rear side
4 Power connection
5 Console port 6 Protective earth connection
7 USB port
10 Viper-8 Series

3.4. Connector Pinout
Pin
no.
Signal Illustration
1 +DC1
2 1
3 4
2 +DC2
3 -COM
4 -COM
Viper supports redundant power connection. The
positive inputs are +DC1 and +DC2. The negative
input for both supplies is -COM
Table 3. Power connector
Pin no. Signal Illustration
1 NCa
2 TX
3 RX
4 NCa
5 GND
aNo Connect. Do not connect.
Table 4. Console connector
Pin no. Signal Illustration
1 DN
2 VBUS
3 NCa
4 DC
5 GND
aNo Connect. Do not connect.
Table 5. USB connector
Viper-8 Series 11

Pin no. Signal Illustration
1 DA+
1
2
3
45
6
7
8
2 DA-
3 DB+
4 DB-
5 DD+
6 DD-
7 DC-
8 DC+
aOnly applicable for Viper-208-T4G-TBN and Viper-208-T8G-TBN
Table 6. Gbps connectora
3.5. 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 configurable, see
WeOS Management Guide)
RSTP OFF RSTP disabled
GREEN RSTP enabled
BLINK Product selected as RSTP/STP root switch
FRNT OFF FRNT disabled
GREEN FRNT OK
RED FRNT error
BLINK Product configured as FRNT focal point
DC OFF Product has no power
GREEN Power OK on DC1 and DC2
RED Power failure on DC1 or DC2
X1 to X8 OFF No link
GREEN Link established
GREEN
FLASH
Data traffic indication
YELLOW Port alarm, or port is set in blocking state by
link redundancy protocol
Table 7. LED indicators
12 Viper-8 Series

3.6. Dimensions
Dimensions are stated in mm and applies to both models.
100
56 ±0,3
164 ±0,5
7,2
+
-
0,2
0,5
82 ±5
28 ±5
36
65
7,4 ±0,5
72
175
27,5 ±5
Grounding point
Screw M5x10
Figure 4. Dimensional drawing
Viper-8 Series 13

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.
X5 X7
DC
CON
FRNT
RSTP
ON
USB
X1
X8
X2
X3
X4 X6
24-110 V
M12 Torque 0.6±0,1 Nm / 0,45±0,1 lbft
DC
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. See the figure below. Torque: 3.2 Nm.
14 Viper-8 Series

X5 X7
DC
CON
FRNT
RSTP
ON
USB
X1
X8
X2
X3
X4 X6
24-110 V
M12 Torque 0.6±0,1 Nm / 0,45±0,1 lbft
DC
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.
WARNING - 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.
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.
Viper-8 Series 15

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 [15].
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: < 8 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.
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.
16 Viper-8 Series

5. Specifications
5.1. Interface Specifications
DC, Power port
Rated voltagea24 to 110 VDC
Operating voltageb16.8 to 143 VDC (14.4 VDC for 100 ms and 154 VDC for 1 s)
Rated current Max 460 mA at 24 VDC, max 110 mA at 110 VDC
Rated frequency DC
Inrush current 80 mA²s at 24 VDC, 140 mA²s at 110 VDC
Startup current Max 560 mA at 16.8 VDC
Polarity Reverse polarity protected
Redundant power input Yes
Isolation To all other ports
Connector 4-pin, male, M12 screw connection, A-coded, recommended Westermo
cables:
3146-1106 for 1.5 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
Circuit type Secondary circuit hazardous voltage, OVC II
aAlso referred to as nominal voltage in EN/IEC 61010-1
bAlso referred to as nominal input including fluctuations in EN/IEC 61010-1
Viper-8 Series 17

Gbps ports
Electrical specification IEEE std 802.3
Data rate 10 Mbps, 100 Mbps, 1 Gbps, manual or auto
Duplex Full or half, manual or autoa
Transmission range Up to 150 m with CAT5e cable or better
Isolation To all other ports
Connector 8-pin, female, M12 screw connection, X-coded
Cabling Shielded cable CAT5e or better is recommended
Conductive chassis Yes
FRNT reconfiguration time Typically below 20 ms
Circuit type TNV-1
aFor 1 Gbps, auto negotiation is always enabled
USB port
Electrical specification USB 2.0 host interface
Data rate Up to 480 Mbps (high-speed mode)
Maximum supply current 500 mA
Isolation To all Ethernet and DC ports
No isolation to CON or protective earth
Connector 5-pin, female, M12 screw connection, A-coded, recommended Westermo
USB plug
3641-0190
Circuit type SELV
Console port
Electrical specification RS-232
Data rate 115.2 kbit/s
Data format 8 data bits, no parity, 1 stop bit, no flow control
Isolation To all Ethernet and DC ports
No isolation to USB or protective earth
Connector 5-pin, female, M12 screw connection, B-coded, recommended Westermo
cables:
1211-2215 (serial port) or 1211-4073 (USB)
Circuit type SELV
18 Viper-8 Series

5.2. 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
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
Conducted RF
immunity
EN 61000-4-6 Power port 10 V, 80% AM, 1 kHz; (0.15-80) MHz
Ethernet ports
Earth port
Radiated RF emission CISPR 16-2-3 Enclosure EN 61000-6-4 (30-6000 MHz)
ANSI C63,4
(FCC Part 15b)
Class A
Conducted RF
emission
CISPR 16-2-1 Power port EN 61000-6-4
CISPR 32 Ethernet ports EN 61000-6-3
Insulation resistance EN 50155 All ports ≥20 MΩat 500 VDC
Dielectric strength EN 50155 Power port to all
other ports
2250 VDC, 1 min
Ethernet ports to
all other ports
2250 VDC, 1 mina
a750 VDC after damp heat, according to EN 50155
Table 8. EMC and electrical conditions
Viper-8 Series 19

Environmental
phenomena
Basic
standard
Description Test levels
Temperatures EN 60068-2-1
EN 60068-2-2
Operational -40 to +70°C (-40 to +158°F)ab
Storage and
transport
-55 to +85°C (-67 to +185°F)
Humidity EN 60068-2-30 Operational 5-95% relative humidity
Storage and
transport
Altitude Operational 2000 m
Service life Operational 20 years according to IEC/TR 62380
MTBF 1: MIL-
HDBK-217F-
N2, GB,
+25°C/ +77°F
2: IEC 62380
1: 659,000 hrs, 2: 603,000 hrs
Vibration IEC 60068-2-6
(sine)
Operational 5 sweeps cycles:
7.5 mm 5-8 Hz
2g, 8-500 Hz
IEC
60068-2-64
(random)
Non-operational
long life
simulation
11.44 m/s² rms 5-150 Hz, 5 hours
20 m/s² rms 5-150 Hz, 30 min operational
Shock IEC
60068-2-27
Operational 10 g, 30 ms, half sine
20 g, 11 ms, saw tooth
Weight 1.45 kg
Degree of protection IEC 60529 Enclosure IP67, no ingress of dust and protection
against water immersion up to 1 m. Also
passes IP66 tests.c
Cooling Convection
Overvoltage
category
EN/IEC
61010-1
OVC II
Pollution degree EN/IEC
61010-1
PD3 macro environment and PD2 micro
environmentd
EN 50124-1 PD2
Location EN/IEC
61010-1
Outdoor, wet locations
IEEE 1478 Class 1, condition E4. Indoor
aRefer to "Safety and Regulations" chapter regarding touch temperature
bOperational at +85°C for a limited time
cProvided all connectors are connected with IP66 and IP67 cablings or fitted with protective caps (delivered with
the unit) and tightened to the specified torque.
dInstallation and maintenance shall be made under controlled environments.
Table 9. Environmental and mechanical conditions
20 Viper-8 Series