Patent ID: 11960274
Assignee: B&R INDUSTRIAL AUTOMATION GMBH
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. Method for monitoring an electrical switching arrangement having at least two channels, which each electrically conductively connect an electrical source supplying the respective channel, forming an electrical supply quantity, to an output of the respective channel, wherein an external safety signal is fed to the switching arrangement, from which external safety signal an internal safety signal is respectively generated for the at least two channels in order to therewith control a voltage interrupter connected in series in the respective channel, wherein the internal safety signals are superimposed with a pulsed diagnostic signal, in which a first diagnostic signal level and a second diagnostic signal level alternate, in order to form two safety signal levels which alternate in the internal safety signals, in order to open the voltage interrupters connected in the respective channels by controlling with the first safety signal level and to close them by controlling with the second safety signal level and to thus respectively alternately interrupt the supply quantities appearing in the respective channels, wherein the alternately interrupted supply quantities are measured as measurement quantities, and Wherein the detected measurement quantities of the alternately interrupted supply quantities are compared to one another in order to determine a deviation between the detected measurement quantities for monitoring the electrical switching arrangement.