Westermo Viper-208-TBN Series User manual

w w w. w ester m o .com
OS
Viper-208-TBN Series
Managed EN 50155 Backbone 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. Bypass Functionality ............................................................ 12
3.6. LED Indicators .................................................................... 15
3.7. Dimensions ........................................................................ 16
4. Installation .................................................................................. 17
4.1. Wall Mounting ..................................................................... 17
4.2. Protective Earth Connection .................................................. 17
4.3. Connection of Cables ........................................................... 18
4.4. Cooling .............................................................................. 19
4.5. Replacement of Product ........................................................ 19
4.6. EN 45545-2 Mounting Notes .................................................. 19
5. Specifications .............................................................................. 20
5.1. Interface Specifications ......................................................... 20
5.2. Type Tests and Environmental Conditions ................................. 23
6. Revision Notes ............................................................................ 25
2 Viper-208-TBN 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-208-TBN 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-208-TBN 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-208-TBN 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.
This product complies with Touch Temperature Limits throughout its
operational temperature range.
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-208-TBN 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, Rapid temperature variations class H2
• 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
Safety • EN/IEC 61010-1, -2-201, Safety requirements for electrical equipment for
measurement, control, and laboratory use
Table 2. Agency approvals and standards compliance
Viper-208-TBN 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-208-TBN Series

3. Product Description
3.1. Product Description
The Viper TBN is a managed backbone routing switch optimised for the needs of the
railway rolling stock market. The dual bypass relay ensures that aggregated links between
cars are maintained, even if there is a power failure in one car. Gbps ports cope with high
bandwidth backbone, consist ring and end-devices.
The Viper 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
3635-2020 Viper-208-T4G-TBN L3 4
3635-2120 Viper-208-T8G-TBN L3 8
Table 3. Available Viper TBN 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-208-TBN Series 9

3.3. Hardware Overview
DC
CON
FRNT
RSTP
ON
USB
X1 X5 X7
Bypass 1
Bypass 2
X8
X2
X3
X4 X6
24-110 V
M12 Torque 0.6±0,1 Nm / 0,45±0,1 lbft
DC
L1
L2
1 2
45
6
8
7
3
Illustrated by a Viper-208-T4G-TBN
Figure 3. Location of interface ports and LED indicators
No. Description No. Description
1 LED indicator 2 1 Gbps port (double ring symbol on
front of product, see table below)
3 GORE-TEX ventilation membrane on
the rear side
4 100 Mbps port (single ring symbol on
front of product, see table below)
5 Power connection 6 Console port
7 Protective earth connection 8 USB port
Model Mbps ports Gbps ports
Viper-208-T4G-TBN X5 to X7 X1 to X4
Viper-208-T8G-TBN - X1 to X8
10 Viper-208-TBN 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 4. Power connector
Pin no. Signal Illustration
1 NCa
2 TX
3 RX
4 NCa
5 GND
aNo Connect. Do not connect.
Table 5. Console connector
Pin no. Signal Illustration
1 DN
2 VBUS
3 NCa
4 DC
5 GND
aNo Connect. Do not connect.
Table 6. USB connector
Viper-208-TBN Series 11

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 7. 100 Mbps Ethernet connector
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+
Table 8. Gbps connector
3.5. Bypass Functionality
The bypass functionality secures connection backbone traffic in case of power failure by
bridging the two pairs of ports normally connected to the backbone.
The ports are cross-coupled when in bypass. This is since the main use cases require the
use of fixed MDI/MDIX settings. During power loss and connection of the two adjacent
switches, the intent is to compensate for the fixed MDI/MDIX settings.
12 Viper-208-TBN Series

Viper-208-TBN and Viper-208-T4G-TBN
internal bypass
X5.1 connected to X7.3
X5.2 X7.4
X5.3 X7.1
X5.4 X7.2
X6.1 X8.3
X6.2 X8.4
X6.3 X8.1
X6.4 X8.2
Table 9. Bypass interfaces
Viper-208-T8G-TBN internal bypass
X5.1 connected to X7.3
X5.2 X7.4
X5.3 X7.1
X5.4 X7.2
X5.5 X7.8
X5.6 X7.7
X5.7 X7.6
X5.8 X7.5
X6.1 X8.3
X6.2 X8.4
X6.3 X8.1
X6.4 X8.2
X6.5 X8.8
X6.6 X8.7
X6.7 X8.6
X6.8 X8.5
Table 10. Bypass interfaces
Viper-208-TBN Series 13

NOTE
In bypass mode, ports X5/X7 and X6/X8 are connected to conduct
internal cross-over. The purpose is to facilitate use cases when these
ports are configured with fixed MDI (or fixed MDIX). To support such use
cases, the network design should ensure that cabling also conduct a cross-
over between these ports on adjacent Viper-TBNs. Then there would be
an odd number of cross-overs between adjacent Viper-TBNs, even during
power-loss of an intermediate Viper-TBN.
When bypassing a switch, approximately 5 m (16 ft) of the transmission
range (100 m, 300 ft) is consumed.
As an example, if a network is intended to cope with a single car blackout
scenario and that two Vipers in that case will be by-passed, the total cable
distance through the blackout car to adjacent switches on each side of the
blackout car, should not exceed 90 m (300 ft).
Normally, the Viper can handle longer distances, up to 150 m (500 ft), but
this can not be guaranteed and has to be investigated case by case. Cable
length data is valid for CAT5e cable.
Switch 1 Switch 2 Switch 3
X7 X5 X7 X5
X8 X6 X8 X6
Figure 4. Bypassing of Viper
14 Viper-208-TBN Series

3.6. 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)
BLINK 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 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
L1 to L2 OFF Relays in bypass mode
GREEN Relays connected to unit (no bypass)
Table 11. LED indicators
Viper-208-TBN Series 15

3.7. Dimensions
Dimensions are stated in mm and are regardless of model.
164 ±0,5
100
7,2
+
-
0,2
0,5
56 ±0,3
82 ±5
29 ±5
72
37
7,4 ±0,5
175
31 ±5
Grounding point
Screw M5x10
Figure 5. Dimensional drawing
16 Viper-208-TBN 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.
X5 X7
Bypass 1
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
L1
L2
Bypass 2
Figure 6. 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.
Viper-208-TBN Series 17

DC
CON
FRNT
RSTP
ON
USB
X1 X5 X7
Bypass 1
Bypass 2
X8
X2
X3
X4 X6
24-110 V
M12 Torque 0.6±0,1 Nm / 0,45±0,1 lbft
DC
L1
L2
Figure 7. 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.
18 Viper-208-TBN Series

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 [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: < 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.
This product complies with Touch Temperature Limits throughout its
operational temperature range.
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-208-TBN Series 19

5. Specifications
5.1. Interface Specifications
DC, Power port
Rated voltagea24 to 110 VDC
Operating voltageb16.8 to 143 VDC (14.4 to 154 VDC for 100 ms)
Rated current Max 470 mA at 24 VDC, max 120 mA at 110 VDC (Viper-208-T4G-
TBN)
Max 660 mA at 24 VDC, max 150 mA at 110 VDC (Viper-208-T8G-
TBN)
Rated frequency DC
Inrush current, I²t 80 mA²s at 24 VDC, 140 mA²s at 110 VDC
Startup currentcMax 680 mA at 16.8 VDC (Viper-208-T4G-TBN)
Max 780 mA at 16.8 VDC (Viper-208-T8G-TBN)
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
cRecommended external supply current capability for proper startup
20 Viper-208-TBN Series