Assurance technologies for electric point machine controlled by Optical LAN

When an interlocking device is improved, a large number of signal cables have to be re-laid and wiring connections must be confirmed. There are possibilities of wiring errors in the improvement of the interlocking device. A railway signal control system using an optical LAN is developed for the purpose of reduction of signal cables and wiring work. This system controls signaling devices by transmitting digital information through an optical network, and it has a method of system configuration to make the system more flexible and secure. In this paper, we introduce development of electric point machine controlled by Optical LAN, and describe assurance technologies used for this system.