Kuhnke PG 674, Instruction Manual

Page: 11 / 52

2 - 3
Reliability/Security
2.4. Security
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:
· provide sufficient separation of low voltage,
· apply power packs in accordance with IEC 364-4-41 or
CENELEC HD 384.4.41 (VDE 0100, Part 410) respectively.
- 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 switches or other emergency installations have to
be realized in accordance with EN 60204/IEC 204
(VDE 0113). They have to 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 (
→
2.3. Notes) which, at relevant places, will make you aware of
possible sources of errors.
- 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 be-
cause wrong handling could lead to rendering measures
against dangerous failures ineffective or to creating
additional dangers.