Distributed Logical Unity Platform (DLU)

The project aims to develop and test the Distributed Logic Unit Platform (DLU), which emerges as an element of ENCEv4, a new Electronic Interlocking system in charge of controlling the circulation of trains at a railway station. The DLU platform has Architecture 2oo3, separation between SIL4 functionality and SIL1 functionality [Safety Integrity Level 4 and 1 (defined as the relative level of risk reduction, which are defined in four safety standards, with level 4 being the most severe and 1 the lowest)], Ethernet communications through four redundant interfaces, management of inputs and outputs of safe and unsafe field elements and communications protocols [TCP / IP, safe in the CELENEC EN 50159 standard (applicable to the aspects of digital transmission and communication between electronic equipment, which covers security in all types of communication networks, both open and closed). The main functions of the DLU are the control and supervision of field elements such as traffic lights, needles, beacons, axle contactor, among others; and, it is made up of hardware, platform software and application software. During the development of the ENCEv4 project, it is considered to use the ULD Platform in the development of other products, so the ULD Platform was certified as an independent product that, in addition, can be used in the Axis Counting System (ACE), equipment electronic designed to safely assess the occupation by a train of a section of track.