Manual – MOVIAXIS® MMD60B - Functional Safety
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Safety functions
Integrated Safety Technology
•
SS1(c)
(safe stop 1, function variant c according to IEC 61800-5-2) by means of suit-
able external control (e.g. safety relay with delayed disconnection)
The following sequence is mandatory:
– Deceleration of the drive using an appropriate brake ramp specified via setpoints
– Disconnect the safety-related 24 V power supply (= 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:
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
∆
t
Time between initiating the brake ramp and STO
Normal operation
Disconnection range
v
t
t
1
t
t
2
