B&R ACOPOSinverter P84, User Manual

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Integrated safety functions
350 ACOPOSinverter P84 User's Manual 2.10
Required safety function level (SF) for the PWR (STO) function
Configuration SIL (Safety Integrity Level ) per IEC 61-50 PL (Performance Level) in accordance with
ISO-13849
PWR (STO) with or without a safety switching de-
vice
SIL 2 PL "d"
Therefore, for the following reasons the safety switching device (or equivalent equipment) must be used in the
vicinity of the machine:
• In the vicinity of the machine (IEC 60204-1 and machine directive) a reset is not permitted to trigger a
restart under any circumstances. There is a particularly compelling case if the voltage supply is switched
off during the activation of the function PWR (STO). In this case, if PWR (STO) has been disabled during
the interruption of the power supply, the motor is not permitted to be restarted automatically under any
circumstances. The safety switching device can prevent an unwanted restart under this condition. The
safety switching device is therefore mandatory for machine applications.
• E_STOP of several BDM in a PDS: The safety switching device has some safety outputs for applications
that require one or several safety outputs.
The safety relay is not necessary in other environments unless required by the application: Fallback position of
the system