We offer:
FlexRay Physical Layer conformance tests for your bus drivers or active stars.

Official FlexRay physical layer conformance test based on the conformance test specification revision 2.1 or 3.0.1 for bus drivers and active stars.

For information or a quote please contact us using the contact details at Contact!

c&s group GmbH Konformitätstest Testhaus Testsysteme

We offer:
Testing your FlexRay Controller.

For information or a quote please contact us using the contact details at Contact!

We offer:
Support during the development of your product with a view to testability.

At the beginning of the IC design phase C&S helps to integrate testability. Pre-testing during the design can reveal problems early. Consequently the customer coaching has been established to support a better understanding of the different specification requirements improving the design and avoiding troubles during the development phase and subsequently in the conformance test.

For information or a quote please contact us using the contact details at Contact!

The principle behind our FlexRay Transceiver Tests.

In 2000 was established the FlexRay Consortium with the aim of developing a rapid,  robust, scalable, deterministic, and fault-tolerant communication system for the automotive applications. As ‘premium associated member’ we have been intensively involved in several activities and have contributed to different working groups. This included the design and creation of the test specifications for the physical and data link layers.

Since several years, the corresponding test systems are available at C&S and we are an officially accepted test house by the consortium.

The FlexRay physical layer conformance tests are conducted in a so called standard network and are necessary to significantly increase the probability of interoperability for FlexRay devices from different suppliers in the later system environment.

During the test the behavior of the devices in their entirety in the network is observed. At the same time the tests verify whether the behavior of your FlexRay device is compliant to the behavior defined in the FlexRay electrical physical layer specification.

The structure of the standard network and the test cases were developed by the FlexRay Consortium. Independent of each other the experts defined together parameters for the development and execution of tests taking into account experience and ‘worst-case scenarios’. The result: your device will be tested under conditions that reflect the later application conditions.

The test cases are classified according to the specific implementation capabilities and functionalities corresponding also to the implemented ‘Functional Classes’.

The test systems.

The test system is a well-defined standardized network (Standard Net), where the devices communicate under various system conditions. A supervisor software controls system states and test sequences. The communication is supervised and controlled by calibrated measurement equipment.

The Standard Net consists of a fixed number of identical nodes. For the test the Standard Net is equipped with your bus driver or active star. Number and position are defined exactly.

c&s group GmbH Konformitätstest Testhaus Testsysteme

The tests verify the proper behavior of your bus driver or active star under different conditions and at certain ‘events’ like:

  • ground shift (static and dynamic)
  • ‘low battery’ within normal operation mode (static and dynamic)
  • undervoltage out of normal operation mode
  • busses interrupted, busses shortened
  • loss of ground and loss of vbat
  • failure in termination
  • ‘Bubbling Idiot’

During the tests the behavior of your product is compared with the expected behavior.

The test data – including raw data – are stored for later analysis and to make the test reproducible. The processed data are given to you with your test report.


Current article of the IHK Braunschweig

The IHK Braunschweig has published an interesting article about us - read for yourself!

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Automotive Ethernet Congress – January 30-31,2018 – Munich

C&S group GmbH will be attending the Automotive Ethernet Congress in Munich from 30 - 31 January 2018.

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The C & S group is building a new headquarter in Wolfenbüttel

Two million euros are to be invested. 15 new jobs are targeted, says the press release.

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