The disclosure provides a control and data transmission installation for redundantly controlling a slave device, which may be a field transmitter. The effect achieved by the control and data transmission installation is that essentially seamless control of a field transmitter can be assured even when a control device fails. The control and data transmission installation has at least two control devices and at least one slave device which are connected to one another by a communication network. The slave device contains addressable output interfaces for receiving output and status data. Each control device has a device for producing and transmitting status and output data for a separate output interface of the slave device, and the slave device has an evaluation device which controls the forwarding of received output data for further use in response to the status signals received from the control devices.