Abstract: An optoelectronic safety device for monitoring a machine movement includes a detection device and a control device. The detection device includes a transmitter unit which transmits an optical signal having a sequence of signal pulses, each of which has a different pulse intensity, and a receiver unit which receives the optical signal. The control device includes an evaluation unit which evaluates the optical signal received by the receiver unit, a pulse selection index, and a pulse selection unit which changes the pulse selection index if the pulse intensity of one of the signal pulses is outside of an optimal intensity range. The control device enables the machine movement if an intensity of a received signal is within a permissible intensity range, and outputs a trigger pulse to stop the machine movement if the intensity of the received signal is outside of the permissible intensity range.

Abstract: An optoelectronic safety device for monitoring a machine movement includes an emitter/receiver device, control electronics, an electric line which includes at least two wires to transmit a supply voltage and a control signal, and a device provided so that the supply voltage and the control signal can be transmitted where the at least two wires is a two-wire electric line or, alternatively, a three-wire electric line.

Abstract: An optoelectronic safety device for monitoring a machine movement includes an emitter/receiver device, control electronics, an electric line which includes at least two wires to transmit a supply voltage and a control signal, and a device provided so that the supply voltage and the control signal can be transmitted where the at least two wires is a two-wire electric line or, alternatively, a three-wire electric line.

Abstract: A monitoring device and method for monitoring machine movements, moving parts of machines, gates, doors and the like, includes controller means with at least a first receiver for wirelessly receiving monitoring signals and a first transmitter for wirelessly transmitting activation signals, and includes monitoring means with at least a second receiver for receiving the activation signals, a second transmitter for transmitting monitoring signals, and at least one monitoring sensor for monitoring an unwired signal path. In one embodiment, the monitoring sensor is an optical safety shut-off bar that monitors the transmission of transmission signals via the unwired signal path.