Operation principle
-A61
-S62
24 V
-S61
M
3~
-Q2
~
-T1
-P62
-T22
1)
~
-A61
-A41
XSTO
OUT
IN1
IN2
SGND
-X969
1-2
3-4
Drive control unitA41
Emergency stop safety relayA61
Emergency stop buttonS61
Emergency stop reset buttonS62
Emergency stop indicator lightP62
Main contactor (optional)Q2
STO terminal blockX969
Drive moduleT1
24 V power supplyT22
Reset circuit1)
OperationStep
Initial status: The drive is in operation and the motor is running.
The user activates the emergency stop by pushing the emergency stop button [S61].1
The emergency stop safety relay [A61] switches off the XSTO inputs IN1 and IN2 of the drive
control unit.
2
The emergency stop indicator light [P62] of the emergency stop reset button [S62] comes on.3
The motor coasts to zero speed and remains at zero speed while the emergency stop is active.4
Normal operation resumes after the user:5
• releases the emergency stop button [S61] to the normal (up) position
• resets the emergency stop circuit with the emergency stop reset button [S62]
• resets the drive (if the STO indication parameter 31.22 has been set so that a fault is gener-
ated)
• makes sure that the drive has received the start signal (depends on the configuration, see
the firmware manual).
16 Option description
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