General i nform a ti on
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Operating manual for PROFIBUS fieldbus | 2015-07 | V1.7 EN
1.6 Responsibility
As a basic principle, electronic devices are not fail-safe. 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 DIN EN 60204-1; VDE
0113-1:2007-
06, “Safety of machinery” 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 voltage supply to
the drive being switched off. To avoid dangerous situations, it may be useful
for individual 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 determined by selecting a circuit category according to DIN
EN 13849 “Safety of machinery – Safety-related parts of control systems”.