2
Integrated safety technology
Safety functions
Manual – MOVIGEAR
®
B
9
2.3
Safety functions
The following drive-related safety functions can be used:
2.3.1
STO
•
STO
(safe torque off according to EN 61800-5-2) by disconnecting the STO input.
If the STO function is activated, the frequency inverter no longer supplies power to
the motor for generating torque. This safety function corresponds to a non-con-
trolled stop according to EN 60204-1, stop category 0.
The STO input must be disabled by a suitable external safety controller/safety re-
lay.
The following figure shows the STO function:
v
t
t
1
2463228171
v
Velocity
t
Time
t
1
Time at which STO is triggered
Disconnection range
22746250/EN – 12/2016
