Rail approval for Safety PLC
At Railtex 13, Pilz will present an automated half barrier level crossing demonstrator, with a Safety PLC System implementing control and signalling. To date, safety solutions in the railway sector have largely used proprietary, specialist technology, much of it based around relay logic. However, this has often involved a lot of work for a one-off approval - particularly with regard to rail safety standards.
Components in the PSS 4000-R system (PLC header modules and modular I/O cards) already include the essential approvals for railway applications as a product feature - keeping verification and validation work to a minimum. Thanks to its scalability, the PSS 4000-R system can be used for SIL 2, SIL 3 and SIL 4 applications.
Various applications can be implemented using the PSS 4000-R including control functions on rolling stock (such as track laying machinery and traction units to SIL 2/SIL 3) and control functions/monitoring functions in the signalling area, such as signal monitoring on level crossings, control and safety technology, and signal box connection to SIL 2/SIL 3/SIL 4. The PSS 4000-R system is characterised by a particularly robust design. It meets the increased requirements from the railway sector. Additional benefits include intuitive programming with standardised EN/IEC 61131-3 Editors and Ethernet-based communication.
Thales Germany has been using the PSS 4000-R. Norbert Howe, director solutions of the German Business Area Transportation Systems says: "Pilz offers us standardised technology for developing signalling products. Pilz supports us to evolve our relay-based rail signalling products using state-of-the-art components.
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