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Critical embedded systems

DATA DIODE

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DATA DIODE FOR CYBERSECURITY APPLICATIONS IN RAILWAY SYSTEMS (EN 50155)

The DATADIODE (or DTD, in short) technology enforces an one-way unidirectional communication device, with protocol break mechanisms, that enables the secure transfer of data between two network domains, or between two critical equipment with different levels of security clearance.  It provides a physical barrier that blocks any traffic in one way, while allowing data to flow freely in the opposite direction.

For instance, using a DATADIODE allows to secure the implementation of carborne remote diagnostic solutions, to protect security information and event management (SIEM) solutions based on juridical event recorders, crash protected memory devices, etc.

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Documentation
DATA DIODE

MAIN FEATURES

  • EN 50155:2021 fully compliant
  • Hardware guaranteed unidirectional traffic
  • Protocol break technology
  • 2x 100Mbits/s independent and isolated channels
  • Low-latency transfer (250µs)
  • ARP on each Ethernet interface
  • Operating temperature : -40°C to +70°C
  • Full range power supply : 24Vdc to 110Vdc
  • 2x independent password protected maintenance ports
  • Dedicated network diagnosis LEDs on each Ethernet port

 

MECHANICAL INTEGRATION

  • Size-1U – half 19’’ rack-mount solution
  • Reduced weight (< 1Kg)
  • All communication ports available on front panel

TYPICAL APPLICATION

DATA DIODE

ENVIRONMENTAL QUALIFICATION TESTS


EMC TESTS

NF EN 61000-4-2

2009

ESD

Enclosure contact: ±6kV

Enclosure air: ±8kV

Criterion B

NF EN 61000-4-3

2020

Radiated immunity RFI

80MHz… 1GHz: 25V/m

1.4GHz… 2.1GHz: 15V/m

2.1GHz… 2.7GHz: 5V/m

5.1GHz… 6.0GHz: 3V/m

Criterion A

NF EN 61000-4-4

2013

Fast burst

±2kV direct/indirect

Criterion A

NF EN 61000-4-5

2014

Transient surge

±2kV MC

±1kV MD

Criterion B

NF EN 61000-4-6

2014

Conducted immunity RFI

150KHz…80MHz / 10Vrms

Criterion A

NF EN 55016-2-1

 

2014

Measuring conducted emissions

150kHz…500kHz

500kHz…30MHz

<99dBµV

<93dBµV

NF EN 55016-2-3

2017

Measuring radiated emissions

30MHz…230MHz

230MHz…1GHz

1GHz…3GHz

3Ghz…6GHz

<50dBµV/m at 3m

<57dBµV/m at 3m

<76dBµV/m at 3m

<80dBµV/m at 3m


CLIMATIC TESTS

NF EN 60068-2-1 

  2007

Cold storage

-40°C 16 hours

Criterion A

NF EN 60068-2-1

  2007

Cold start

-40°C

Criterion A

NF EN 60068-2-2  

 2007

Dry heat

+70°C / +85°C 10min

Criterion A

NF EN 60068-2-30

2006

Damp test

+55°C 95% humidity 48 hours

Criterion A

NF EN 60068-2-14

2009

Fast temperature change

-25°C / +70°C / 5 cycles

Criterion A


FIRE PROTECTION

NF EN 45545

2020

Railway applications /Fire protection on railway vehicles

HL3


MECHANICAL TESTS

NF EN 60068-2-642008Random vibration5…150Hz – 1.01m/ s²Criterion A
NF EN 60068-2-642008Simulated Long Life testing

5 … 150Hz – 7.9m/s² – XYZ

5 hours

Criterion A
NF EN 60068-2-272009Shocks50m/s² – XYZ – 30msCriterion A