Patent ID: 8125309

Claim:
An interface for a safety relevant function, said interface comprising: a first switch control configured for: a) receiving a first signal representative of a command inputted for remotely controlling said function; b) detecting, based on said first signal, whether an error condition exists; and c) only if no error condition is detected by said first switch control, outputting a first switch control signal, said first switch control signal for activating said function provided a second switch control signal is outputted; and a second switch control comprising a safety filter, and configured for: a) receiving a second signal representative of said command; b) detecting, based on said second signal, whether an error condition exists; and c) only if no error condition is detected by said second switch control, outputting, by said safety filter, said second switch control signal, said second switch control signal for activating said function provided said first switch control signal is outputted.