Abstract: An EtherCAT fieldbus system has an EtherCAT master and a number of EtherCAT slaves. The EtherCAT master and the number of EtherCAT slaves are coupled together by an EtherCAT fieldbus in order to exchange data. A method ascertains active EtherCAT slaves by way of the EtherCAT master; requests respective product codes of the active EtherCAT slaves by way of the master; ascertains a respective device identification of the active EtherCAT slaves from the respective product codes by way of the EtherCAT master, and switches the state of the EtherCAT fieldbus system into the operational state by way of the EtherCAT master if the respective device identification of the active EtherCAT slaves matches a specified device identification.

Abstract: An EtherCAT fieldbus system has an EtherCAT master and a number of EtherCAT slaves. The EtherCAT master and the number of EtherCAT slaves are coupled together by an EtherCAT fieldbus in order to exchange data. A method ascertains active EtherCAT slaves by way of the EtherCAT master; requests respective product codes of the active EtherCAT slaves by way of the master; ascertains a respective device identification of the active EtherCAT slaves from the respective product codes by way of the EtherCAT master, and switches the state of the EtherCAT fieldbus system into the operational state by way of the EtherCAT master if the respective device identification of the active EtherCAT slaves matches a specified device identification.

Abstract: A measuring instrument, in particular a voltage tester, is provided having two probes which are arranged in separate housings through which connecting cables extend. The housings are magnetically attractive, because of either a first magnet arranged on a first one of the housings for cooperation with the magnetic material of the other housing, or a corresponding pair of opposed magnets provided in magnetically attractive relation on the two housings, respectively. Recesses are provided in the second housing opposite the corresponding magnets of the first housing. Corresponding pivot ribs extend circumferentially around the housings in the space between the first one magnet and the adjacent probe end, thereby to permit accurate spacing of the probes during the taking of a test measurement.

Abstract: A measuring instrument, in particular a voltage tester, is provided having two probes which are arranged in separate housings through which connecting cables extend. The housings are magnetically attractive, because of either a first magnet arranged on a first one of the housings for cooperation with the magnetic material of the other housing, or a corresponding pair of opposed magnets provided in magnetically attractive relation on the two housings, respectively. Recesses are provided in the second housing opposite the corresponding magnets of the first housing. Corresponding pivot ribs extend circumferentially around the housings in the space between the first one magnet and the adjacent probe end, thereby to permit accurate spacing of the probes during the taking of a test measurement.