This article discusses methods for constructing interface devices for computer based
systems of railway automation using various components and principles of safety
provision in case of failures. A comparative description of various approaches to the
implementation of safe interface devices taking into account modern achievements in the field of power electronics is given. Particular attention is paid to the selection of technical
solutions, taking into account the specifics of executive facilities, the requirements for the
used component base and the features of the system implementation area.
relay interface devices, contactless interface devices, relay interface devices, first class relay, power relay, monitoring of switching elements