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Manual – MOVIDRIVE® MDX61B Safety Module MOVISAFE® DCS..B Option
3
Safety functions
Integrated Safety Technology
3.2.4 SS2(b) – Safe Stop 2
When the SS2(b) function is active, the inverter brings the motor to a standstill electri-
cally. The position must be safely monitored after standstill (SOS function according to
EN 61800-5-2). The STO safety function will be triggered if the deceleration value until
standstill is exceeded or if there is a movement at standstill. STO means that standstill
has to be ensured by a mechanical brake.
This safety function corresponds to a controlled stop of the drive according to EN 60204-
1, stop category 2.
1970957067
Safety function monitors
Safety function trips
v=Velocity
t=Time
t
1
= Point of time when SS2(b) is activated and motor deceleration is triggered
t
2
= Point of time when SOS is triggered
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