Abstract: A field device having radio communication devices for different radio networks and/or protocols and/or a radio communication device having different operating modes, a control device, and a position determining device. The control device activates one of the radio communication devices and/or an operating mode of the radio communication device according to position. The disclosed method of operation comprises switching on or activating the field device, determining a position a position of the field device, determining radio communication networks available at the position on the basis of the determined position of the field device, activating one of the radio communication devices and/or an operating mode of the radio communication device according to the determined position, transmitting and/or receiving data via the radio communication device, and switching off or deactivating the radio communication device and/or the field device.

Abstract: The invention is a field device with an input unit comprising a first number of switch elements in order to generate first input signals and a second number of magnetically actuatable sensor elements assigned to the switch elements in order to generate second input signals which are OR-linked to the first input signals. Each switch element is assigned to at least two sensor elements, which are arranged and connected such that the respective second input signal is output only when at least two specified sensor elements assigned to a switch element are activated.

Abstract: The invention is a field device with an input unit comprising a first number of switch elements in order to generate first input signals and a second number of magnetically actuatable sensor elements assigned to the switch elements in order to generate second input signals which are OR-linked to the first input signals. Each switch element is assigned to at least two sensor elements, which are arranged and connected such that the respective second input signal is output only when at least two specified sensor elements assigned to a switch element are activated.