2009 – July – Nellai and Lusty – Radio Link for use in Computer Based Interlocking – Microlok

Somasundaram Nellai B.S (Eng Tech), MS (IM), MIET, AMIRSE Ansaldo STS Australia Pty Ltd Anthony Stephen Lusty BE (Electrical), GDip Railway Signalling, MIRSE Ansaldo STS Australia Pty Ltd The introduction of Processor Based Interlockings (PBIs) to the railway network has led to the requirement for vital serial data communication between distributed PBIs. Traditionally, vital serial data has been carried via closed/hardwired communication systems (eg copper  or Fibre Optic), which often involve significant installation costs. The Ansaldo STS developed Microlok Vital link over Radio (MVR) provides an efficient and cost effective alternative. The MVR is a point to point, open transmission communication system, which transports vital serial data between distributed PBI applications in low to medium density railway networks. The MVR has been specifically developed to meet the requirements of conventional vital communication, addressing all the requirements for the safe communication of vital data. The paper outlines the system concept, the development process, challenges, independent safety validation and successful implementation of new MVR systems in rail networks.