Alister 2.0 - Programmable Logic Controllers in Railway Interlocking Systems for Regional Lines of the DB Netze AG

Reiner Saykowski, Elferik Schultz & Joachim Bleidiessel
Railway interlockings are dominated by highly proprietary systems. We present the development project Alister 2.0 -- an interlocking system based on industry-proven standard components: Safety PLCs in distributed nodes communicate over safe network protocols. This enables a highly productive and highly maintainable fail-safe interlocking system for centralised traffic control.