Lenze 8400 - Manual (Page 276)

Safety engineering
Operating mode
10

276 EDS84ASC552 EN 9.1
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 connected 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 EN 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 is 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).
M
SU
PWM
μC
P C
3x
3x
X80 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
P Power section
M Motor