The EU standard PN-EN 50 159-2 allows for the use of open transmission systems in railway traffic control. This applies to both wired and wireless transmission standards. The primary criterion is to ensure an acceptable level of risk (THR) in accordance with the applicable standards PN-EN 50 126 and PN-EN 50 129. This means that the THR indicator for railway control systems assigned to a given Safety Integrity Level (SIL) should not exceed the maximum value specified for that level. The paper discusses a risk analysis that takes into account the implementation of an open transmission channel, using the example of two railway control systems designed for the Polish railway sector.THE RISK ANALYSIS AS A BASIC DESIGNED METHODS OF SAFETY OPEN NETWORK TRANSMISSION APPLIED IN RAILWAY CONTROL SYSTEMS
Existing in UE standard PN-EN 50 159-2 allows a possibility of applying the open transmission systems in railway control systems. It is related both cable and wireless transmission standards. The basic requirement is connected with ensuring the Tolerable
Hazard Rate according to PN-EN 50126 and PN-EN 50129 railway standards. It’s mean that appropriate coefficient THR for safety level does not exceed the permitted value. The paper includes the analysis of two systems with open transmission standards designed for the Polish Railways. (…)
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Source: Logistyka Magazine