Abstract: A bus-based control system comprises a plurality of bus subscribers which are connected to one another by means of a communication medium. The bus subscribers are assigned logical subscriber addresses. Next, the assigned subscriber addresses are verified. For this purpose, the bus subscribers use a defined mathematical operation to calculate a common first check value which is compared with a second check value. The mathematical operation begins with a defined starting value and comprises a number of operation steps which use a number of defined operands. Each of the subscriber addresses to be verified forms a different operand, and each bus subscriber executes at least one operation step.

Abstract: A safety circuit arrangement for failsafe connection or disconnection of a hazardous installation has a control device, which is designed to connect or interrupt, in failsafe fashion, a power supply path to the installation. The safety circuit arrangement also has a signaling device, which is connected to the control device via a two-wire line having a first core and a second core. The signaling device has an actuator, which can change between a defined first state and a second state. Between the two cores is a substantially constant voltage when the actuator is in the second state. A pulse generator in the signaling device causes a voltage dip between the first core and the second core in order to generate a defined pulsed signal comprising a plurality of signal pulses on the lines, when the actuator is in the defined first state.

Abstract: An arrangement for wirelessly networking sensors, actuators and at least one shared control unit in automation technology, has a first connection point for receiving an RF transmit signal from an RF transmitter and for providing an RF receive signal from an antenna. The arrangement has a second connection point, which leads to the antenna, and a signal coupler, arranged between the first connection point and the second connection point. The signal coupler transmits the RF transmit signal from the first connection point to the antenna, and transmits the RF receive signal from the antenna to the first connection point. The signal coupler has a variable coupling attenuation with a low first attenuation factor and at least one higher second attenuation factor. The signal coupler transmits the RF receive signal using the low first attenuation factor and transmits the RF transmit signal using the higher second attenuation factor.

Abstract: A safety device for a machine, in which machine a first machine part having a leading edge performs a working movement towards a second machine part, comprises a plurality of optical safety barriers and an evaluation unit. The optical safety barriers move in the working movement simultaneously with the first machine part in such a manner that the safety barriers move in advance of the leading edge at various spaced dispositions. The optical safety barriers span a protective field that has a two-dimensional cross section. The evaluation unit is designed for generating a stop signal to stop the first machine part in dependence upon the optical safety barriers. Towards the end of the working movement, the optical safety barriers are held substantially stationary in the region of the second machine part. The optical safety barriers are deactivated one following the other before they are interrupted by the first machine part.