Westermo Viper-220A-P8-LV, Viper-220A-P8-HV, Viper-120A-P8-LV, Viper 20A-PoE Series, Viper-120A-T4G-P8-HV User Manual

User Guide
6641-22521

REV. B

©Westermo Network Technologies AB

www.westermo.com

FRNT

RSTP

DC

ON

X8

X12

X13

X14

X7

X6

X10

X11

X5

X9

X15

X16

X17

X18

X19

X20

X1

USB

X2

X3

X4

24-38 V

DC

CON

PoE

M12 Torque 0.6±0,1 Nm / 0,45±0,1 lbft

RING

FRNT

RSTP

DC

ON

X8

X12

X13

X14

X7

X6

X10

X11

X5

X9

X15

X16

X17

X18

X19

X20

X1

USB

X2

X3

X4

48-110 V

DC

1000BASE-T

CON

PoE

M12 Torque 0.6±0,1 Nm / 0,45±0,1 lbft

Viper 20A-PoE Series

20 port Ethernet M12 switches with

Power over Ethernet

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. Maintenance ......................................................................... 7

2.5. Product Disposal ................................................................... 7

2.6. Compliance Information .......................................................... 8

2.6.1. Agency Approvals and Standards Compliance .................... 8

2.6.2. FCC Part 15.105 .......................................................... 8

2.6.3. Simplified Declaration of Conformity .................................. 8

3. Product Description ...................................................................... 10

3.1. Product Description .............................................................. 10

3.2. Available Models ................................................................. 10

3.3. Hardware Overview ............................................................. 11

3.4. Connector Pinout ................................................................. 12

3.5. LED Indicators .................................................................... 14

3.6. Dimensions ........................................................................ 14

4. Installation .................................................................................. 16

4.1. Wall Mounting ..................................................................... 16

4.2. Connection of Cables ........................................................... 16

4.3. Cooling .............................................................................. 17

4.4. Removal of Product ............................................................. 17

4.5. 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

2 Viper 20A-PoE 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 Software tools under Technical support at

www.westermo.com.

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 (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-PoE 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 20A-PoE Series

2.2. Safety Information

Before installation:

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

This unit should only be installed by qualified personnel.

This unit should be built-in to an apparatus cabinet or similar, where access is restricted to
service personnel only.

The power supply wiring must be sufficiently fused, and if necessary, it must be possible to
disconnect it manually from all power supply. Ensure compliance to national installation
regulations.

This unit relies on convection cooling. Make sure that it is installed so that the ambient
temperature is within the specified temperature range, e.g. by avoiding obstruction of the
airflow around the unit. Also see EN 45545-2 Mounting Notes [17] chapter.

WARNING - PREVENT ACCESS TO HAZARDOUS VOLTAGE

Before mounting, using or removing this unit: Prevent access to hazardous
voltage by disconnecting the unit from all power supply.

WARNING - HAZARDOUS VOLTAGE

Do not open the connected unit. Hazardous voltage may occur within this
unit when connected to power supply.

CAUTION - HOT SURFACE

Be aware of that the surface of this unit may become hot. When this unit
is operated at high temperatures, the external surface of the equipment
may exceed Touch Temperature Limit according to EN/IEC/UL 60950-1.

Viper 20A-PoE Series 5

NOTICE - REDUCE RISK OF FIRE

To reduce the risk of fire:

1. Use only No. 18 AWG or larger power cable for Viper LV units

2. Use only No. 21 AWG or larger power cable for Viper HV units

3. Use only No. 26 AWG or larger telecommunication line cord

Additionally, any cable used for Power over Ethernet must fulfill
requirements specified in IEEE 802.3.

NOTICE - CONNECT EXTERNAL FUSE

The unit has no internal fuse and should be connected via an external fuse
for protection. The fuse must be UL approved and rated for at least 160
VDC / 7.5 A.

NOTICE - ADDITIONAL EMC TYPETESTS

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

2.3. Care Recommendations

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

• Do not attempt to disassemble the unit. There are not any user serviceable parts inside.

• Do not drop, knock or shake the unit. Rough handling above the specification may cause
damage to internal circuit boards.

• Do not use harsh chemicals, cleaning solvents or strong detergents to clean the unit.

• Do not expose the unit to any kind of liquid (water, beverages, paint etc), unless all
connectors are connected or fitted with protective caps (delivered with the unit),
tightened to the specified torque. Connected cables must have the appropriate ingress
protection code.

• Do not use or store the unit in dusty or dirty areas, unless all connectors and the
ventilation membrane are sufficiently protected.

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

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

6 Viper 20A-PoE Series

2.4. Maintenance

No maintenance is required, as long as the unit is used as intended within the specified
conditions.

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

Figure 1. WEEE symbol for treatment of product disposal

Viper 20A-PoE Series 7

2.6. Compliance Information

2.6.1. Agency Approvals and Standards Compliance

Type

Approval/Compliance

Climate • EN 50155/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 61000-6-2, Immunity industrial environments

• EN 61000-6-4, Emission industrial environments

• EN 50121-3-2/IEC 62236-3-2 Railway applications – Rolling stock – apparatus

• Tested and verified for Class S1, DB EMC Regulation 06, Commodity team Radio
compatibility in VDB Rev 1.0 (Shunting Radio). Compliant with SBB requirements.

• Tested and verified for Class S1, ÖBB Radio compatability in near field in
accordance with ÖBB Infrastructure Edition 4, Revision 14 (Shunting Radio).

• Tested and verified for FCC part 15

Mechanical
(Shock and
vibration)

• EN 61373 category 1, class A and B

• EN 60068-2-27 20 g, 11 ms and 100 g, 6 ms

Insulation
(Coordination and
test)

• EN 50124-1, Railway applications – Insulation coordination

• EN 50155/IEC 60571, Railway applications - Electronic equipment used on rolling
stock

Fire protection • EN 45545-2, Fire protection on railway vehicles

• NFPA 130, Fire protection for fixed guideway transit and passenger rail system

Table 2. Agency approvals and standards compliance

2.6.2. FCC Part 15.105

This equipment 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 equipment is operated in a commercial environment.

This equipment generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instruction manual, may cause harmful interference to
radio communications. Operation of this equipment 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.

2.6.3. Simplified Declaration of Conformity

Hereby, Westermo declares that the equipment is in compliance with applicable EU
directives. The full EU declaration of conformity and other detailed information is available
at the respective product page at www.westermo.com.

8 Viper 20A-PoE Series

Figure 2. The European conformity marking

Viper 20A-PoE Series 9

3. Product Description

3.1. Product Description

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

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.

Meeting the requirements of the railcar market, the Viper 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 and have eight PoE ports. Viper x20A-PoE is used when referring
to both models 120A-PoE and 220A-PoE.

Art.no

Model Layer Gbps ports HV LV

3635-1010 Viper-120A-P8-HV 2 - 48 - 110 V

3635-1020 Viper-220A-P8-HV 3 - 48 - 110 V

3635-1110 Viper-120A-P8-LV 2 - 24 - 38 V

3635-1120 Viper-220A-P8-LV 3 - 24 - 38 V

3635-1310 Viper-120A-T4G-P8-HV 2 4 48 - 110 V

3635-1320 Viper-220A-T4G-P8-HV 3 4 48 - 110 V

3635-1410 Viper-120A-T4G-P8-LV 2 4 24 - 38 V

3635-1420 Viper- 220A-T4G-P8-LV 3 4 24 - 38 V

Table 3. Available Viper x20A-P8 models

10 Viper 20A-PoE Series

3.3. Hardware Overview

M12 Torque 0.6±0,1 Nm / 0,45±0,1 lbft

X11 X17

X10 X16

X2

ON

FRNT

CON

RSTP

USB

DC

X5

X1 X4

X7

X6

PoE

X13 X19

X8

1000BASE-T

48-110 V

DC

X14 X20

X12 X18

X9X3 X15

1 2

46

7

9

8

3

5

No. Description No. Description

1 LED indicator 2 100 Mbps port

3 100 Mbps PoE port 4 Gbps ports

5 Gbps PoE port 6 Power connection

7 Console port 8 USB port

9 Protective earth connection

Figure 3. Location of interface ports and LED indicators

Viper 20A-PoE Series 11

3.4. Connector Pinout

Pin
no.

Signal

Illustration

1 +DC1

2 1

3 4

2 +DC1

3 -COM

4 -COM

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

Table 4. Power connector HV

Pin
no.

Signal

Illustration

1 +DC1

3

1

2

4

2 +DC1

3 -COM

4 -COM

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

Table 5. Power connector LV

Pin no.

Signal Illustration

1 NC

2 TX

3 RX

4 NC

5 GND

Table 6. Console connector

12 Viper 20A-PoE Series

Pin no. Signal Illustration

1 DN

2 VBUS

3 NC

4 DC

5 GND

Table 7. USB connector

Pin
no.

Signal

Illustration

1 TD+

2 RD+

3 TD-

4 RD-

MDI, MDI-X and auto MDI/MDI-X modes are
supported. The table shows signals in MDI mode.

Table 8. 100 Mbps Ethernet connector

Pin no.

Signal Illustration

1 DA+

1

2

3

45

6

7

8

2 DA-

3 DB+

4 DB-

5 DD+

6 DD-

7 DC-

8 DC+

Table 9. Gbps connector

Viper 20A-PoE Series 13

3.5. LED Indicators

LED Status Description

ON OFF Unit has no power

GREEN All OK, no alarm condition

RED Alarm condition, or until unit 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 Unit selected as RSTP/STP root switch

FRNT OFF FRNT disabled

GREEN FRNT OK

RED FRNT error

BLINK Unit configured as FRNT focal point

DC OFF Unit has no power

GREEN Power OK. Input voltage > 70% of minimum

nominal voltage

RED Power failure. Input voltage < 70 % of

minimum nominal voltage

X1 to X20 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

PoE OFF Port does not consume PoE power

GREEN Port consumes PoE power

Table 10. LED indicators

3.6. Dimensions

Dimensions are stated in millimetres and are regardless of HV or LV model.

14 Viper 20A-PoE Series

3,5 +1 -0,5

83

110

178

160

164 ±0,5

56 ±0,3

7,2 +0,2 -0,5

Grounding point

screw M5x10

Figure 4. Dimensional drawing

Viper 20A-PoE Series 15

4. Installation

4.1. Wall Mounting

The unit 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

X11 X17

X10 X16

X2

ON

FRNT

CON

RSTP

USB

DC

X5

X1 X4

X7

X6

PoE

X13 X19

X8

1000BASE-T

48-110 V

DC

X14 X20

X12 X18

X9X3 X15

Figure 5. Wall mounting

4.2. Connection of Cables

Recommended tightening torque for the M12 connectors is 0.6 Nm.

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

16 Viper 20A-PoE Series

NOTICE - UNUSED CONNECTORS

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

NOTICE - CONNECT EXTERNAL FUSE

The unit has no internal fuse and should be connected via an external fuse
for protection. The fuse must be UL approved and rated for at least 160
VDC / 7.5 A.

4.3. Cooling

This unit relies on convection cooling. Make sure that it is installed so that the ambient
temperature is within the specified temperature range, e.g. by avoiding obstruction of the
airflow around the unit.

4.4. Removal of Product

Disconnect all cables and unscrew the unit from the wall. Time for replacement: < 15
minutes.

CAUTION - HOT SURFACE

Be aware of that the surface of this unit may become hot. When this unit
is operated at high temperatures, the external surface of the equipment
may exceed Touch Temperature Limit according to EN/IEC/UL 60950-1.

4.5. EN 45545-2 Mounting Notes

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

Viper 20A-PoE Series 17

5. Specifications

5.1. Interface Specifications

DC, Power port

Rated voltage Viper-x20A-PoE LV units: 24 to 38 VDC

Viper-x20A-PoE HV units: 48 to 110 VDC

Operating voltage Viper-x20A-PoE LV units:

16.8 to 49.9 VDC (14.4 to 53.2 VDC for 100 ms)
Viper-x20A-PoE HV units:

33.6 to 143 VDC (28.8 to 154 VDC for 100 ms)

Rated current Viper-x20A-PoE LV units: max 5.0 A at 24 VDC, max 3.2 A at 38 VDC

Viper-x20A-PoE HV units: max 2.6 A at 48 VDC, max 1.1 A at 110 VDC

Rated frequency DC

Inrush current, I²t Viper-x20A-PoE LV units: 580 mA2s at 24 VDC, 560 mA²s at 38 VDC

Viper-x20A-PoE HV units: 200 mA2s at 48 VDC, 160 mA²s at 110 VDC

Startup current

a

Viper-x20A-PoE LV units: 1.8 A at 16.8 VDC
Viper-x20A-PoE HV units: 750 mA at 33.6 VDC

Polarity Reverse polarity protected

Redundant power input No

Isolation 2250 VDC to all other ports

Connector Viper-x20A-PoE LV units:

4-pin, male, M12, T-coded, recommended Westermo cable:
3146-1108 for 5 m
Viper-x20A-PoE HV units:
4-pin, male, M12, A-coded, recommended Westermo cables:
3146-1106 for 1.5 m
3146-1107 for 5 m

Cable size For Viper-x20A-PoE HV units:

M12, recommended cable area 0.5 mm² (minimum 0.25 mm²)
For Viper-x20A-PoE LV units:
M12, recommended cable area 1 mm² (minimum 0.75 mm²)
Cable dimensions depend on choice of M12 connector

a

External supply current capability for proper startup

18 Viper 20A-PoE Series

100 Mbps ports, non PoE

a

Electrical specification IEEE std 802.3

Data rate 10 Mbps, 100 Mbps, manual or auto

Duplex Full of 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 ports

b

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 Required

Conductive chassis Yes

FRNT reconfiguration time Typically below 20 ms

a

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

b

750 VDC after damp heat, according to EN 50155

Gbps ports, non-PoE

a

Electrical specification IEEE std 802.3

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

Circuit type TNV-1

Transmission range Up to 100 m with CAT5e cable or better

Isolation 2250 VDC to all other ports

b

Connector 8-pin, female, M12, X-coded

Shielded cable Required

FRNT reconfiguration time Typically below 20 ms

a

Gbps ports, non-PoE are: X8, X14

b

750 VDC after damp heat, according to EN 50155

Viper 20A-PoE Series 19

PoE ports, 100 Mbps and Gbps

a

Electrical specification IEEE std 802.3

Circuit type TNV-1

Transmission range Up to 100 m with CAT5e cable or better

Isolation 2250 VDC to all other ports

b

Output voltage 54 VDC, ±5%

Output power

c

Max 30 W on one port (PoE+)
Max 80 W in total on all ports

a

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

b

750 VDC after damp heat, according to EN 50155

c

As delivered by Power Sourcing Equipment, i.e. the Viper-x20A-PoE switch. Power available at Powered Device is
depending on the cable resistance.

NOTE

PoE ports are not isolated to each other.

USB port

Electrical specification USB 2.0 host interface

Data rate Up to 480 Mbps (high-speed mode)

Maximum supply current 500 mA

Circuit type SELV

Isolation To Ethernet and DC ports: 2250 VDC

No isolation to CON or chassis

Connector 5-pin, female, M12, A-coded, recommended Westermo USB plug

3641-0190

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

Circuit type SELV

Isolation To Ethernet and DC ports: 2250 VDC

No isolation to USB or chassis

Connector 5-pin, female, M12, B-coded, recommended Westermo cables:

1211-2215 (serial port) or 1211-4073 (USB)

20 Viper 20A-PoE 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

Pulsed magnetic field EN 61000-4-9 Enclosure 300 A/m

Radiated RF
immunity

EN 61000-4-3 Enclosure 20 V/m at (80 MHz to 2 GHz)

10 V/m at (2-6 GHz)
1 kHz sine, 80% AM

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 (80-6000 MHz)

ANSI C63,4
(FCC Part 15)

EN 61000-6-4 (80-6500 MHz)

Conducted RF
emission

CISPR 16-2-1 Power port EN 61000-6-4

Ethernet ports EN 61000-6-3

Dielectric strength EN 60950-1 Power port to all

other ports

2250 VDC, 1 min

Ethernet ports to
all other ports

2250 VDC, 1 min

a

Gbps Ethernet
ports to all other
ports

2250 VDC, 1 min

a

PoE ports to all
other ports

2250 VDC, 1 min

a

a

750 VDC after damp heat, according to EN 50155

Table 11. EMC and electrical conditions

Viper 20A-PoE Series 21

Environmental
phenomena

Basic
standard

Description

Test levels

Temperatures EN 60068-2-1

EN 60068-2-2

Operating -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 Operating 5-95% relative humidity

Storage and
transport

Altitude Operating 2000 m/70 kPa

Service life Operating 20 years according to IEC/TR 62380

MTBF

Viper-x20A-P8-LV:

367,000 hours

MIL-C217F2, GB, 25°C (+77°F)

Viper-x20A-P8-HV:

366,500 hours

Viper-x20A-T4G­P8-LV:

363,000 hours

Viper-x20A-T4G­P8-HV

362,500 hours

Vibration IEC 60068-2-6

(sine)

Operational 2 g rms 5-500 Hz, 5 sweeps

IEC
60068-2-64
(random)

Non-operational
long life
simulation

11.44 m/s² rms 5-150 Hz, 5 hours

Shock IEC

60068-2-27

Operational 10 g, 30 ms, half sine

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

Enclosure EN 60950-1 Zinc (front),

Aluminium (rear)

Fire enclosure

Dimension WxHxD
with connectors

See "Dimensions" chapter for details

Weight 2.5 kg

Degree of protection EN 60529 Enclosure IP67

c

Cooling Convection

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 IP67 cabling or fitted with protective caps (delivered with the unit)
and tightened to the specified torque.

Table 12. Environmental and mechanical conditions

22 Viper 20A-PoE Series

6. Revision Notes

Revision

Date Change description

Rev. B 2018-12 2.2 Safety Information updated with specific symbol for Caution - Hot

surface, and text in Notice - Connect external fuse, 2.5 Environmental
Protection updated to Product disposal, 2.6.1 Agency Approvals table
updated, 2.6.3 Declaration of Conformity updated to Simplified
Declaration of Conformity, 3.3 Hardware Overview table updated, 4.2
updated with Notice - Connect external fuse, 4.4 symbol for Caution ­Hot surface updated, 5.1 Interface specifications - Gbps ports;
Transmission range updated and note updated, inrush current, 5.2 Type
Tests and Environmental Conditions - enclosure updated, end page
updated

Rev. A 2017-09 First issue of user guide

Viper 20A-PoE Series 23

Westermo • SE-640 40 Stora Sundby, Sweden

Tel [phone] Fax [phone]

E-mail: [e-mail]

www.westermo.com

6641-22521 REV. B 2018 12 Westermo Network Technologies AB, Sweden