A kind of platform host plug-in unit

The invention discloses a kind of platform host plug-in unit, highly versatile, it is safe, be easy to safeguard.Its technical scheme is：Realized by the main frame plug-in unit on platform and mathematical computations and logical process are carried out to input data or state, formed secure data through safety voting and calculating and export, plug-in security integrality reaches IEC 62425:SIL4 grades as defined in 2007 standards, and pass through associated safety certification, in the safety-related equipment of development rail traffic signal system, the main frame plug-in unit of the present invention can be used directly as core processing unit, reduce R＆D cycle and cost, equipment Risk is reduced, while the related work of safety certification can be mitigated significantly.