II
Devices that are designed for mounting in housings or control
cabinets must only be operated and controlled after they have
been installed with the housing closed. Desktop or portable units
must only be operated and controlled in enclosed housings.
Measures should be taken to ensure the proper restart of
programs interrupted after a voltage dip or failure. This should
not cause dangerous operating states even for a short time. If
necessary, emergency-stop devices should be implemented.
Wherever faults in the automation system may cause damage to
persons or property, external measures must be implemented to
ensure a safe operating state in the event of a fault or malfunc-
tion (for example, by means of separate limit switches, mechan-
ical interlocks etc.).
The electrical installation must be carried out in accordance with
the relevant regulations (e. g. with regard to cable cross
sections, fuses, PE).
All work relating to transport, installation, commissioning and
maintenance must only be carried out by qualified personnel.
(IEC 60 364 and HD 384 and national work safety regulations).
All shrouds and doors must be kept closed during operation.
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