Signalling
Signalling 
TÜV SÜD provides functional safety assessments for electronic signalling systems. With a long service life and some failure occurrences likely, it is important that the equipments failure modes do not result in electromagnetic interference affecting safety critical systems.
Signalling equipment is assessed for compliance with the following relevant standards:
EN 50126, EN 50128, EN 50129 and EN 50121, EN 50123, EN 50124, EN 50159-1,-2
According to EN 50128 and EN 50129 the assessment activities implemented depend on the safety integrity level (SIL) assigned to the subsystems or components. Where the product is an evolution of an existing product the assessment is often based on already existing approvals or assessed safety cases. The safety case for new equipment is prepared in parallel with product development, with documentation provided to the assessors at incremental stages of the development.
A focus of our assessments is to prove the functional and signalling safety including the reliability aspect. Although the standards require an assessment of the processes, the over-riding goal is the actual technical audit.
Great importance is also placed on defining failure modes and performing selected tests on the subsystems or the system as a whole. This is especially important as the systems might be supplied by various manufacturers from various countries. Technical or operational miss-interpretations due to language problems, must as be minimised as far as possible.
We also undertake acceptance management, risk and hazard analysis (qualitative and quantitative), FMEA, fault tree analysis, simulation, RAMS management and auditing services.
We have experience of working on large signalling and communication projects such as GSM-R, Connect, Train Information & Management Information System (TIMIS) and Transmission Based Train Control (TBTC).
In addition to signalling, TÜV SÜD provides a full range of testing, certification, consulting and training and has considerable rail industry experience in:
| Benefits of using TÜV SÜD for testing signalling equipment |
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