Vital solid state controller

Details Vital solid state controller Vital solid state controller

G - Physics

05

B

G05B 9/03 (2006.01) B61L 13/04 (2006.01) B61L 29/30 (2006.01) G05B 19/05 (2006.01)

Patent

CA 2710038

A vital programmable logic device (VPD) is provided having at least two microprocessors. The VPD is configured to provide failsafe operation of a vital control system while operating in a closed circuit environment. In at least one embodiment of the present invention, railroad grade crossing signals are controlled by the VPD.

L'invention concerne un dispositif de logique programmable vital (VPD) ayant au moins deux microprocesseurs. Le VPD est configuré pour permettre un fonctionnement sans défaut d'un système de commande vital tout en fonctionnant dans un environnement en circuit fermé. Dans au moins un mode de réalisation de la présente invention, des signaux de passage à niveau sont commandés par le VPD.

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