Abrégé

85294035 Abstract Power-over-Ethernet-based field device of automation technology comprising: - a field device housing; - an Ethernet connection for the field device is obtain energy via the Ethernet connection and for exchanging data with the network; - a field device electronics, which is supplied an operating voltage, and which serves for registering a process variable and communicating process data via the Ethernet connection; - a voltage converter electronics has at least a first means, which is adapted at least in a first operating state to heat the interior of the field device housing to a first threshold temperature and which, furthermore, contributes in a second operating state to converting a voltage applied to the Ethernet connection into the operating voltage, so that the field device electronics can register the process variable in the second operating state and communicate the process data via the Ethernet connection. Date Recue/Date Received 2020-09-23

Classes IPC  ?

• G05B 19/042 - Commande à programme autre que la commande numérique, c.à d. dans des automatismes à séquence ou dans des automates à logique utilisant des processeurs numériques

Abrégé

A method for monitoring a predetermined filling level of a medium (3) in a container (2) with at least one measuring probe (1) and an electronic unit (7), wherein the measuring probe (1) is operated alternately in the conductive and in the capacitive operating mode, wherein the measuring probe (1) is subjected to an excitation signal, which excitation signal is composed of two different, temporally alternately consecutive periodic partial signals, wherein the first periodic partial signal for the conductive operating mode is generated in a first time interval and the second periodic partial signal for the capacitive operating mode is generated in a second time interval, wherein it is determined from the response signal, which is obtained by the measuring probe (1) and is dependent on the current partial signal, in accordance with the capacitive or conductive operating mode, whether the predetermined filling level has been reached, and a message is generated if the filling level exceeds or falls short of said filling level.

Classes IPC  ?

• G01F 23/24 - Indication ou mesure du niveau des liquides ou des matériaux solides fluents, p.ex. indication en fonction du volume ou indication au moyen d'un signal d'alarme en mesurant des variables physiques autres que les dimensions linéaires, la pression ou le poids, selon le niveau à mesurer, p.ex. par la différence de transfert de chaleur de vapeur ou d'eau en mesurant les variations de résistance de résistances électriques produites par contact avec des fluides conducteurs