Elmo Rietschle 2FC4...-1CB - Manual (Page 13)

Safety and responsibility 3
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Requirements of the operator
As a basic principle, electronic devices are not fail-proof. The operator and/or the
contractor setting up the machine or system is responsible for ensuring that the
drive switches to a safe state if the device fails.
The “Electrical equipment of machines” section in EN 60204-1, “Safety of ma-
chinery” describes the safety requirements for electrical control units. These are
provided for the safety of people and machines and must be observed in order to
retain the functional capability of the machine or system.
An emergency stop feature does not have to result in the power supply to the
drive being switched off. To avoid dangerous situations, it may be useful for indi-
vidual drives to remain operational or for specific safety procedures to be initiated.
The effectiveness of emergency stop measures is evaluated by means of a risk
assessment for the machine or system and its electrical equipment, and is deter-
mined by selecting a circuit category according to EN 13849 “Safety of machinery
– Safety-related parts of control systems”.
The operator ensures that:
▪ All work on the is carried out by:
– personnel that have the necessary Staff qualifications and training [➙ 12]
– personnel that have been sufficiently informed of these instructions and all
related documents [➙ 6]
▪ Assignment, responsibility and supervision of personnel is regulated.
▪ The content of these and locally applicable instructions are always available to
personnel.
▪ All local and plant-specific safety measures are adhered to, such as:
– Prevention of accidents
– safety and operating regulations
– Utility company regulations
– Standards and laws
▪ Dangers due to electrical energy are not possible.
3.5