An automation device for the redundant control of a bus subscriber, including: a bus interface for communication with the bus subscriber; a first communication interface for communication with a first controller via a first communication network; a second communication interface for communication with the second controller via a second communication network; and a processor. The processor transmits bus data received from the bus interface to the first communication interface and to the second communication interface. The first communication interface transmits the received bus data to the first controller, the second communication interface transmits the received bus data to the second controller, and the first communication interface and the second communication interface are communicatively separated. The processor also transmits first communication data received via the first communication interface and second communication data received via the second communication interface to the bus subscriber via the bus interface.