Moxa ANT-WSB-ANM-05 Manuel D’Utilisation
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2009 Industrial Wireless Guidebook
Understanding Industrial WLAN – IEEE 802.11
2
2.7 Industrial Certification
EN50155 Certification
EN50155 are the standards that define requirements for railway cars, or rolling stock. It clearly outlines the
requirements for power input voltage fluctuation, transient, ambient temperature ranges, shock and vibration
and as well as fog and salt spray. Electronics that are used aboard railway rolling stock are required to meet the
standards of EN50155. The target of EN50155 certification for all electronics is for the devices to be operable
24/7 for as long as 20 years. To meet this standard, an electronic device needs to meet the requirements as
summarized below:
requirements for power input voltage fluctuation, transient, ambient temperature ranges, shock and vibration
and as well as fog and salt spray. Electronics that are used aboard railway rolling stock are required to meet the
standards of EN50155. The target of EN50155 certification for all electronics is for the devices to be operable
24/7 for as long as 20 years. To meet this standard, an electronic device needs to meet the requirements as
summarized below:
Power Input Voltage Fluctuation
A nominal 110 VDC power input system needs have at least 77 to 137.5 VDC voltage fluctuation range with no
time limits. The fluctuation may sometimes become too extreme so electronic devices should also be able to
withstand 66 to 154 VDC power input for at least 100 ms.
time limits. The fluctuation may sometimes become too extreme so electronic devices should also be able to
withstand 66 to 154 VDC power input for at least 100 ms.
Transient and Ambient Temperature
Railway rolling stock require an operating temperature range of -25 to 40°C, or -40 to 85°C, for electronic
devices. When the trains enter and leave a tunnel, the temperature change can be very drastic. As a result,
electronic devices must also be able to withstand a 3°C/sec temperature change and thermal shock that
leads to condensation on the PCB.
devices. When the trains enter and leave a tunnel, the temperature change can be very drastic. As a result,
electronic devices must also be able to withstand a 3°C/sec temperature change and thermal shock that
leads to condensation on the PCB.
Shock and Vibration
EN50255 follows the test standards of EN67373. Electronic devices must withstand at least 1 G vibration
when mounted on a DIN-Rail. Chassis mounted devices are required to withstand a shock rating as high as
50 G.
when mounted on a DIN-Rail. Chassis mounted devices are required to withstand a shock rating as high as
50 G.
Atmospheric Pollutants
Combustible dust accompanied by oil, sulphur dioxide, and salt spray in the air create a hazardous
environment for rolling stock applications. As a result, an EN50155 compliant device must have a high IP
rating.
environment for rolling stock applications. As a result, an EN50155 compliant device must have a high IP
rating.
Air Cooling
Force air cooling systems are not allowed. EN50155 electronic devices must have conductive-only
mechanism designs to eliminate potential maintenance problems that arise from fan cooling systems.
mechanism designs to eliminate potential maintenance problems that arise from fan cooling systems.
Moxa AWK Series Meet EN50155 and EN50121-3-2/50121-4 Standards for Rail Traffic
Certified to Meet Industry Standards Rail vehicles require the highest standards of stability due to random
vibrations that occur during normal operation. The EN 50155 standard covers electronic equipment used on
rolling stock, and EN 50121-4 defines the emission and immunity of
signaling and telecommunication apparatus. They outline the issues
that need to be addressed to ensure that railway electrical systems
are integrated successfully.
vibrations that occur during normal operation. The EN 50155 standard covers electronic equipment used on
rolling stock, and EN 50121-4 defines the emission and immunity of
signaling and telecommunication apparatus. They outline the issues
that need to be addressed to ensure that railway electrical systems
are integrated successfully.
The AWK series is engineered to resist extreme vibrations and
shocks based on the railway standards (EN50155/EN50121-3-
2/50121-4).
shocks based on the railway standards (EN50155/EN50121-3-
2/50121-4).
Rail Traffic
- EN 50155 (Environmental)
- EN 50155 (Environmental)
- EN 50121-3-2 (EMC)
- EN 50121-4 (EMC)