Kuhnke KDT 633, Instruction Manual

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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.