Safety and Reliability 2.4. Safety Our product normally becomes part of larger systems or install- ations. The following notes are intended to help integrating the product into its environment without dangers for man or mate- rial/equipment. 2.4.1. To be observed during project planning and installation - 24V DC power supply: Generate as electrically safely separated low voltage. Suitable devices are, for example, split transformers constructed to correspond to European standard EN 60742 (corresponds to VDE 0551) - In case of power breakdowns or power fades: the program has to be structured in such a way as to create a defined state at restart that excludes dangerous states.
- Emergency switch-off installations or other emergency instal- lations have to be realized in accordance with EN 60204/ IEC 204 (VDE 0113). They must be effective at any time. - Safety and precautions regulations for qualified applications have to be observed. - Please pay particular attention to the notes of warning which, at relevant places, will make you aware of possible sources of dangerous mistakes or failures. - The relevent standards and VDE regulations are to be ob- served in every case. - Control elements have to be installed in such a way as to ex- clude unintended operation.
- Control cables have to be layed in such a way as to exclude interference (inductive or capacitive) which could influence the operation of the controller. To achieve a high degree of conceptual safety in planning and installing an electronic controller it is essential to follow the instructions given in the manual exactly because wrong han- dling could lead to rendering measures against dangerous fail- ures ineffective or to creating additional dangers. 2 - 3