www.westermo.com
USER GUIDE
Viper 3508-TBN Series
Managed EN 50155 Backbone Routing Switch
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
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.
1.6. Integrity Seal
To ensure that the product package has not been opened, there is an integrity seal. If the seal is unexpectedly broken or missing contact your support channel for advice.
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
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.
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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. Upon removal of the product, disconnect the product from the power supply and all other communication ports before disconnecting the protective earthing conductor. |
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HAZARDOUS VOLTAGE Do not open an energised product. Hazardous voltage may occur when connected to a power supply. |
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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. |
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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. |
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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. |
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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). |
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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. |
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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.
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 | 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 |
| Cybersecurity a. | • IEC 62443-4-2 SL2, Security for industrial automation and control systems |
| Software | • EN 50657:2017 Software Onboard Rolling Stock (Basic Integrity) |
| Safety | • EN/IEC/UL 61010-1, -2-201, Safety requirements for electrical equipment for measurement, control, and laboratory use |
a. Certification ongoing
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
Product Description
3.1. Product Description
Viper 3508-TBN series consists of powerful, managed 8-port backbone routing switches, 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 and wirespeed routing cope with high bandwidth backbone, consist ring and end-devices.
The Viper 3508-TBN 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 labs certify the compliance to a wide range of standards, not least EN 50155, where the highest class is achieved in all aspects.
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 3508-TBN series in robustness and offers easy configuration update and backup.
3.2. Available Models
| Art. no. | Model | SW | Gbps ports |
| 3635-2325 | Viper-3508-E-T8-TBN | Layer 3 | – |
| 3635-2025 | Viper-3508-E-T4G-T4-TBN | Layer 3 | 4 |
| 3635-2125 | Viper-3508-E-T8G-TBN | Layer 3 | 8 |
Table 2. Available models
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NOTE – MECHANICAL FORCE ON VENTILATION MEMBRANE Do not cover or bring mechanical force to the ventilation membrane on the back of the product. |
3.3. Hardware Overview
Illustrated by a Viper-3508-E-T4G-T4-TBN
Figure 3. Location of interface ports and LED indicators
| No. | Description | No. | Description |
| 1 | LED indicator | 5 | Power connection |
| 2 | 1 Gbps port (double ring symbol on front of product, see table below) | 6 | Console port |
| 3 | GORE-TEX ventilation membrane on the rear side | 7 | Protective earth connection |
| 4 | 100 Mbps port (single ring symbol on front of product, see table below) | 8 | USB port |
| Model | Mbps ports | Gbps ports |
| Viper-3508-E-T8-TBN | X1 to X8 | – |
| Viper-3508-E-T4G-T4-TBN | X5 to X7 | X1 to X4 |
| Viper-3508-E-T8G-TBN | – | X1 to X8 |
3.4. Connector Pinout
| Pin no. | Signal | Illustration |
| 1 | +DC1 |  |
| 2 | +DC2 | |
| 3 | -COM | |
| 4 | -COM |
Table 3. Power connector, male, A-coded
Viper supports redundant power connection.
The positive inputs are +DC1 and +DC2. The negative input for both supplies is -COM
| Pin no. | Signal | Illustration |
| 1 | NC a. |  |
| 2 | TX | |
| 3 | RX | |
| 4 | NC a. | |
| 5 | GND |
a. No Connect. Do not connect.
Table 4. Console connector, female, B-coded
| Pin no. | Signal | Illustration |
| 1 | DN |  |
| 2 | VBUS | |
| 3 | NC a. | |
| 4 | DC | |
| 5 | GND |
a. No Connect. Do not connect.
Table 5. USB connector, female, A-coded
| 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 6. 100 Mbps Ethernet connector, female, D-coded
| Pin no. | Signal | Illustration |
| 1 | DA+ |  |
| 2 | DA- | |
| 3 | DB+ | |
| 4 | DB- | |
| 5 | DD+ | |
| 6 | DD- | |
| 7 | DC- | |
| 8 | DC+ |
a. Only applicable for Viper-208-T4G-TBN and Viper-208-T8G-TBN
Table 7. Gbps connector, female, X-coded a.
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.
Viper-3508-E-T8-TBN and Viper-3508-E-T4GT4-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 8. Bypass interfaces
Viper-3508-E-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 9. Bypass interfaces
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-3508-TBNs. Then there would be an odd number of cross-overs between adjacent Viper-TBNs, even during power-loss of an intermediate Viper-3508TBN.
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.
Figure 4. Bypassing of Viper
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 WeOS5 User 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 | |
| FLASH | 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 10. LED indicators
3.7. Dimensions
Dimensions are stated in mm and are regardless of model.
Figure 5. Dimensional drawing
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.
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. Torx: T25 and torque: 3.2 Nm.
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.
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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. |
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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 [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.
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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.
Specifications
5.1. Interface Specifications
| DC, Power port | |
| Rated voltages a. | 24 to 110 VDC |
| Operating voltage b. | 16.8 to 143 VDC (14.4 VDC for 100 ms and 154 VDC for 1 s) |
| Rated current | Viper-3508-E-T8-TBN: Max 430 mA at 24 VDC, max 110 mA at 110 VDC Viper-3508-E-T4G-T4-TBN: Max 470 mA at 24 VDC, max 120 mA at 110 VDC Viper-3508-E-T8G-TBN: Max 660 mA at 24 VDC, max 150 mA at 110 VDC |
| Rated frequency | DC |
| Inrush current | 80 mA2s at 24 VDC, 140 mA2s at 110 VDC |
| Startup current | Max 580 mA at 16.8 VDC (Viper-3508-E-T8-TBN) Max 680 mA at 16.8 VDC (Viper-3508-E-T4G-T4-TBN) Max 780 mA at 16.8 VDC (Viper-3508-E-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 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 |
a. Also referred to as nominal voltage in EN/IEC 61010-1
b. Also referred to as nominal voltage in EN/IEC/UL 61010-1
| 100 Mbps ports a. | |
| Electrical specification | IEEE std 802.3 |
| Data rate | 10 Mbps, 100 Mbps, manual or auto |
| Duplex | Full or half, manual or auto |
| Transmission range | Up to 150 m with CAT5e cable or better |
| Isolation | To all other portsb• |
| Connector | 4-pin, female, M12 screw connection, 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 |
| Cabling | Shielded cable CAT5e or better is recommended |
| Conductive chassis | Yes |
| FRNT reconfiguration time | Typically below 20 ms |
| Circuit type | TNV-1 |
a. 100 Mbps ports are port X1-X8 on Viper-3508-E-T8-TBN and ports X5-X8 on Viper-3508-E-T4G-T4-TBN
b. In case of bypass, no isolation between X5 to X7 and X6 to X8
| Gbps ports a. | |
| Electrical specification | IEEE std 802.3 |
| Data rate | 10 Mbps, 100 Mbps, 1 Gbps, manual or auto |
| Duplex | Full or half, manual or autob- |
| 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 |
a. Gbps ports are: X1-X4 on Viper-3508-T4G-T4-TBN, X1-X8 on Viper-3508-E-T8G-TBN. Viper-3508-E-T8-TBN has no Gbps ports.
b. For 1 Gbps, auto negotiation is always enabled
c. In case of bypass, no isolation between X5 to X7 and X6 to X8
| USB port | |
| Electrical specification | USB 2.0 host interface |
| Data rate | Up to 480 Mbps (high-speed mode) |
| Maximum supply current | 200 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 |
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 Q,0.5 µF, 1.2/50 µs L-E: ± 1 kV, 12 Q,9 µF, 1.2/50 µs L-L: ± 2 kV,42 Q, 0.5 µF, 1.2/50 µs L-L: ± 0.5 kV, 2 Q, 18 µF, 1.2/50 µs |
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| Ethernet port | L-E: ± 2 kV, 2 Q | |||
| Radiated RF immunity | EN 61000-4-3 | Enclosure | 20 Vim at (80 MHz to 2 GHz) 10 V/m at (2-6 GHz) 1 kHz sine,80% AM |
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| 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 MQ at 500 VDC | |
| Dielectric strength | EN 50155 | Power port to all other ports | 2250 VDC, 1 min | |
| Ethernet ports to all other portsa. | 2250 VDC, 1 minb. | |||
a. In case of bypass, no isolation between X5 to X7 and X6 to X8
b. 750 VDC after damp heat, according to EN 50155
Table 11. EMC and electrical conditions
| Environmental phenomena |
Basic standard | Decription | Test levels | |
| Temperatures | EN 60068-2-1 | Operational | -40 to +70°c (-40 to +158°F)•·b. | |
| EN 60068-2-2 | ||||
| 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/80 kPa | ||
| Service life | Operational | 20 years according to IEC/TR 62380 | ||
| MTBF | 1: Mi – | Viper-3508-E-T4G-T4-TBN: | ||
| HDBK-217F- | 1: 460,000 h,2: 598,000 h | |||
| N2,GB, | Viper-3508-E-T8G-TBN: | |||
| +25°c1+77°F | 1: 360,000 h,2: 564,000 h | |||
| 2: IEC 62380 | Viper-3508-E-T8-TBN: | |||
| 1: 470,000 h,2: 625,000 h | ||||
| Vibration | IEC 60068-2-6 (sine) |
Operational | 5 sweeps cycles: 7.5 mm 5-8 Hz 2g,8-500 Hz |
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| IEC 60068-2-64 (random) |
Non-operational long lfe simulation | 11.44 m/s2 rms 5-150 Hz, 5 hours 2.02 m/s2 rms 5-150 Hz, 10 min operational | ||
| Shock | IEC 60068-2-27 |
Operational | 10 g,30 ms, half sine 20 g, 11 ms, saw tooth | |
| Weight | 1.5 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.<· |
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| Cooling | Convection | |||
| Overvoltage category | EN/IEC/UL 61010-1 | OVC ll | ||
| Pollution degree | EN/IEC/UL 61010-1 | PD3 macro environment and PD2 micro environment. | ||
| 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. Provided all connectors are connected with IP66 and IP67 cablings or fitted with protective caps (delivered with the unit) and tightened to the specified torque.
d. Installation and maintenance shall be made under controlled environments.
Table 12. Environmental and mechanical conditions
Revision Notes
| Revision | Date | Change description |
| Rev. B | 2025-03 | 1.6 Integrity Seal; new chapter |
| Rev. A | 2024-10 | First version |
Viper 3508-TBN Series
6635-2205 REV. B 2025 03
@ Westermo Network Technologies AB, Sweden
Documents / Resources
 |
westermo Viper 3508-TBN Series Managed Backbone Routing Switch [pdf] User Guide Viper 3508-TBN Series, Viper 3508-TBN Series Managed Backbone Routing Switch, Managed Backbone Routing Switch, Backbone Routing Switch, Routing Switch, Switch |
