Patent ID: 7783814

Claim:
Safety module ( 5 ) for connection to a bus system control module ( 2 ), which is provided for connecting one or more input/output modules ( 4 a , 4 b ) for field devices, via a databus ( 3 ), characterized in that the safety module ( 5 ) is separate from said bus system control module ( 2 ) and is connectable to said databus ( 3 ), and wherein said safety module ( 5 ) has a data processing unit (μC 2 ) which is set up corresponding to the bus system control module ( 2 ) for redundant, identical processing of the data transmitted via the databus ( 3 ), and in that the data processing unit (μC 2 ) is set up for ensuring correct data communication with a safety function in such a way that mutual checking of the safety function takes place by means of data exchange via the databus ( 3 ) with the bus system control module ( 2 ).