Reliability, Safety
E 811 GB
8
27/02/2013
2.5.1 Project Planning and Installation
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24 VDC power supply: generate as electrically safely separated low
voltage. Suitable devices include split-winding transformers built in com-
pliance with European Standard EN 60742 (corresponds to VDE 0551).
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Power breakdowns or power fades: the program structure is to ensure
that a defined state at restart excludes all dangerous states.
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Emergency-off installations must comply with EN 60204/IEC 204 (VDE
0113). They must be operative at any time.
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Safety and precautions regulations for qualified applications have to be
complied with.
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Please pay particular attention to the notices of warning which, at rele-
vant places, will make you aware of possible sources of dangerous mis-
takes or faults.
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Relevant standards and VDE regulations are to be complied with in
every case.
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Control elements are to be installed in such a way as to exclude unin-
tended operation.
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Lay control cables such that interference (inductive or capacitive) is ex-
cluded if this interference could influence controller operation or its func-
tionality.
2.5.2 Maintenance and Servicing
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Precautions regulation VBG 4.0 to be observed when measuring or
checking a controller after power-up. This applies to section 8 (Admissi-
ble deviations when working on parts) in particular.
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Repairs must be carried out by specially trained Kuhnke staff only (usu-
ally in the main factory in Malente). Warranty expires in every other
case.
Spare parts:
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Only use parts approved of by Kuhnke. Only genuine KUHNKE modules
must be used in modular controllers.
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Modular systems: always plug or unplug modules in a power-down state.
You may otherwise damage the modules or (possibly not immediately
recognisably!) inhibit their functionality.
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Always dispose of (rechargeable) batteries as hazardous waste.
