SEW-Eurodrive MOVISAFE DCS21B

Manual – MOVIDRIVE® MDX61B Safety Module Option MOVISAFE® DCS..B
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Safety functions
Integrated Safety Technology
3.2.3 SS1(c) – Safe Stop 1
When the SS1(c) function is active, the inverter brings the motor to a standstill electri-
cally. The STO safety function will be triggered after a specified, safety-relevant time.
This safety function corresponds to a controlled stop of the drive according to EN 60204-
1, stop category 1.
9007201225618443
Safety function monitors
Safety function trips
v=Velocity
t=Time
t
1
= Point of time when SS1(c) is activated and motor deceleration is triggered
t
2
= Point of time when STO is triggered
∆t = Safety-related period of time
t
2
t
1
t
V
Δt
INFORMATION
• The SS1(c) function does not monitor the stopping of the drive.
• The safety-relevant period of time ∆t allows the drive to come to a stop. In the event
of a fault, the drive does not come to a stop and becomes de-energized at the time
t
2
(STO).
P
i
f
kVA
Hz
n