Patent ID: 9423784
Filing Date: 2016-08-23
CPC Classification: G01N,G05B

Claim Text:
1. In an installation operated in an automated manner under the control of at least one control unit, said installation having a plurality of operational states and at least one safety-related state, a sensor arrangement comprising: an input circuit designed to receive a first input signal depending on the safety-related state and designed to receive at least one further input signal depending on one of said plurality of operational states, a first output and at least one second output for outputting a first output signal and a second output signal to the at least one control unit, and an evaluation unit designed to evaluate the first input signal in a fail-safe manner and, on the basis thereof, to generate the first and second output signals at the first and second outputs, with the first and second output signals forming a redundant signal pair which in combination signals the safety-related state to the control unit, wherein the evaluation unit is further designed to evaluate the further input signal and, on the basis thereof, to generate a third output signal at the first output and a fourth output signal at the second output, with the third and fourth output signals forming a non-redundant signal pair which differs from the redundant signal pair, and further wherein the evaluation unit generates the redundant signal pair with the first and second output signals if and only if the input circuit receives only the first input signal.