Patent ID: 7385316

Claim:
A safety device for an industrial boiler, the device comprising: at least one electromechanical relay which forms an electromechanical safety chain, wherein each electromechanical relay of the at least one electromechanical relay is mounted on a support in the form of a printed circuit card; and a current converter associated with a first electromechanical relay of the at least one electromechanical relay of the electromechanical safety chain, which converts an input electrical signal of the first electromechanical relay into an electronic signal, the electronic signal supplied by the current converter being processed in a logic integrated circuit, wherein the current converter and the logic integrated circuit operate as an electronic safety chain that is redundant with respect to the electromechanical safety chain, wherein the safety device is connected to at least one sensor and to at least one actuator which are mounted on the industrial boiler, and the at least one sensor delivers an electrical current as a corresponding input signal to the electromechanical safety chain, and the safety device controls the at least one actuator depending on electrical current delivered by the sensor.