Reliability/Safety 2.4 Safety Our product normally becomes part of larger systems or in- stallations. The following notes are intended to help inte- grating the product into its environment without dangers for humans or material/equipment. 2.4.1 Observe during planning and installation Ш 24V DC power supply: Generate as electrically safely separated low voltage. Suitable devices are, for example, split transformers constructed in compliance with European standard EN 60742 (corresponds to VDE 0551). Ш In case of power breakdowns or power fades: the program is to be structured in such a way as to create a defined state at restart that excludes dangerous states.
Ш Emergency switch-off installations must comply with EN 60204/IEC 204 (VDE 0113). They must be effective at any time. Ш Safety and precautions regulations for qualified appli- cations have to be observed. Ш Please pay particular attention to the notes of warning which, at relevant places, will make you aware of possible sources of dangerous mistakes or faults. Ш Relevent standards and VDE regulations are to be ob- served in every case. Ш Control elements are to be installed in such a way as to exclude unintended operation. Ш Control cables are to be layed in such a way as to ex- clude interference (inductive or capacitive) which could in- fluence controller operation or its functionality.
To achieve a high degree of conceptual safety in planning and installing an electronic controller it is essential to ex- 15