INTERFACE UNIT, CONVEYING SYSTEM AND METHOD

摘要

The invention relates to an interface unit, (1), a conveying system and a method. The interface unit (1) comprises an input circuit (2) for the signal (3a, 3b) determining the safety of the conveying system. The interface unit (1) further comprises means (4a, 4b, 5a, 5b, 6) for testing the operating condition of the input circuit (2).