Safety engineering
Operating mode
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EDS84ASC552 EN 10.0
10.5 Operating mode
With the integrated safety system, product key: ...B..., the following safety function can be
used:
ƒ Safe Torque Off (STO)
If requested, the safe disconnection of the drive is achieved through:
ƒ Directly c onnected active sensors
ƒ Passive sensors connected to a safety switching device
The safety functions are suitable for applications according to IEC 61508 to SIL 3 and
achieve a performance level (PL) e and the control category 4 according to E N ISO 13849-1.
Danger!
If the request for the safety function is cancelled, the drive will restart
automatically.
You must provide external measures which ensure that the drive only restarts
after a confirmation (EN 60204).
The transmission of the pulse width modulation i s safely switched (off) by the safety unit.
After this, the power drivers do not generate a rotating field. The motor is safely switched
to torqueless operation (STO).
X80
E84ABSB005
Fig. 10-1 Operating principle of safety unit
SU Safety unit
X80 Control terminals of safety unit (pluggable terminal strip)
C Control section
C Microcontroller
PWM Pulse width modulation
PPowersection
M Motor
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