2
Integrated safety technology
Safety functions
Manual – MOVIGEAR
®
B
10
2.3.2
SS1(c)
•
SS1(c)
(safe stop 1, function variant c according to IEC 61800-5-2) by means of
suitable external control (e.g. safety relay with delayed disconnection)
The following sequence is mandatory:
– Decelerate the drive using an appropriate brake ramp specified via setpoints.
– Disconnect the STO input (= triggering the STO function) after a specified
safety-related time delay.
This safety function corresponds to a controlled stop according to EN 60204-1,
stop category 1.
The following figure illustrates the SS1(c) function:
v
t
t
1
t
t
2
2463226251
v
Velocity
t
Time
t
1
Point of time when the brake ramp is initiated
t
2
Point of time when STO is triggered
Δt
Time between initiating the brake ramp and STO
Safe time delay range
Disconnection range
22746250/EN – 12/2016
