Field device of automation technology, comprising: a housing; arranged in or on the housing a first light emitting means, which serves as visual status display and which is arranged in such a manner that it is visible externally of the housing; arranged in the housing a second light emitting means, which is adapted to activate the first light emitting means such that the first light emitting means emits light; located in the housing a field device electronics, which is adapted to activate the second light emitting means via a signal with a predetermined frequency such that the second light emitting means emits light, such that the second light emitting means activates the first light emitting means such that the first light emitting means emits light.