Abstract: An apparatus for compensating for resistance tolerances of a fuse for a circuit, wherein the apparatus is particularly intended for use in a line driver for a communication device and includes a tolerance-affected fuse, a first resistor connected in series with the fuse, and a second resistor connected in parallel with the fuse and the first resistor, where the apparatus has, at a predefined ambient temperature, a resistance that corresponds to a desired total resistance, where the resistance of the second resistor is, depending on a power input into the apparatus in a fault state and/or depending on a predefined tolerance of the resistance of the apparatus, a multiple of that of the first resistor.

Abstract: Switch for connecting field apparatuses and device for galvanically isolating at least one apparatus which is connectable to a 2-wire Ethernet bus system includes an uplink and a downlink PHY interface device that each have a transmitting unit and a receiving unit that has two output terminals for providing a received ternary-coded signal as differential signal, includes an uplink and a downlink signal split device that are each connected to the output terminals of an assigned receiving unit and are configured to split a ternary-coded signal provided as differential signal into two binary coded signals, and includes an uplink and a downlink optocoupler device that are each connected to an assigned signal split device and are configured to transfer two received binary-coded signals to a transmitting unit of an assigned PHY interface device.

Abstract: An apparatus for compensating for resistance tolerances of a fuse for a circuit, wherein the apparatus is particularly intended for use in a line driver for a communication device and includes a tolerance-affected fuse, a first resistor connected in series with the fuse, and a second resistor connected in parallel with the fuse and the first resistor, where the apparatus has, at a predefined ambient temperature, a resistance that corresponds to a desired total resistance, where the resistance of the second resistor is, depending on a power input into the apparatus in a fault state and/or depending on a predefined tolerance of the resistance of the apparatus, a multiple of that of the first resistor.

Abstract: A transmission device for the intrinsically safe transmission of data in an Ethernet network via a core pair of an Ethernet cable is disclosed. The transmission device includes a first sub-path connected to a first wire of the core pair of an Ethernet signal pair and a second sub-path connected to a second wire of the core pair of the Ethernet signal pair. Each sub-path comprises at least one current-limiting resistor and a common-mode rejection unit connected in series to the current-limiting resistor.

Abstract: An automation system, a controller, a field device and method for operating the automation system, wherein a first field device is provided for an operation on site with an operating unit, where depending on an operator input, the first field device transmits a request for a provision of data to the controller, which returns to the field device corresponding data relating to functionalities in the automation system lying outside the first field device, and where information corresponding to the data is output on the operating unit of the first field device such that an on-site display in the automation system of existing measurement values that were previously not available on the first field device, or a configuration of automation functions which do not run on the first field device is advantageously permitted.