Emulated voltage-free safety contact

A safety contact for a safety line in a train, the safety contact comprising

• a controller and a safety switch circuit,
• wherein the controller comprises a sensor input for receiving signals indicating failure,
• wherein the safety contact comprises an input for a safety line input signal, wherein the input is operably connected to the controller, wherein the controller is configured to receive a control signal representing a safety line state which is dependent on the safety line input signal received at the input,
• wherein the safety switch circuit comprises at least one safety switch, the at least one safety switch being positioned between a power supply and an output,
• wherein the controller is configured to:
• in response to the control signal indicating a working safety line state and a first sensor input value representing no safety function failure, close said at least one safety switch of the safety switch circuit, thereby connecting the output of the safety switch circuit to the power supply, thus putting an output signal on the output, the output signal indicating the working safety line state, and
• in response to the control signal indicating a non-working safety line state or a second sensor input value representing a safety function failure, open said at least one safety switch of the safety switch circuit, thereby essentially interrupting the safety line.