Device for despatching a secure output command
AssigneeSiemens Transporation Systems, Inc.
InventorsBenoit Fumery, Pierre Capdevila
Life of this patent
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Abstract
The invention aims to provide a compact device for despatching a command. For this purpose, the invention proposes a novel type of output stage. A secure verification device of the despatching of a binary command signal from at least one conductor has an input terminal and an output terminal. Means of insertion despatch a verification message on said conductor. At least one optical coupler has an emission diode coupled to the conductor so as to copy the verification message when the binary signal is in a first state and not to copy it when it is in a second state different from the first state.
Claims26
Secure verification device of the despatching of a binary command signal on at least one conductor having an input terminal and an output terminal, the device comprising:
- means of insertion of a verification message onto said conductor,
- at least one optical coupler having an emission diode coupled to the conductor so as to copy the verification message when the binary signal is in a first state and not to copy it when it is in a second state different from the first state.
Secure command system comprising:
- means of generation of a command,
- means of verification which verify the proper operation of said system,
- means of security energizing which provide a security voltage under the monitoring of the verification means,
- means of despatch of the command in a secure manner with the aid of the security voltage,
- wherein the means of despatch comprise at least one secure verification device of the despatching of a binary command signal on at least one conductor having an input terminal and an output terminal, the device comprising:
- means of insertion of a verification message onto said conductor,
- at least one optical coupler having an emission diode coupled to the conductor so as to copy the verification message when the binary signal is in a first state and not to copy it when it is in a second state different from the first state.
Transport vehicle comprising a secure command system comprising:
- means of generation of a command,
- means of verification which verify the proper operation of said system,
- means of security energizing which provide a security voltage under the monitoring of the verification means,
- means of despatch of the command in a secure manner with the aid of the security voltage,
- wherein the means of despatch comprise at least one secure verification device of the despatching of a binary command signal on at least one conductor having an input terminal and an output terminal, the device comprising:
- means of insertion of a verification message onto said conductor,
- at least one optical coupler having an emission diode coupled to the conductor so as to copy the verification message when the binary signal is in a first state and not to copy it when it is in a second state different from the first state.
Dependencies are inferred from the claim text.