Safety And Requirements For Using The Product; Safety; Safety Instructions For Use Of The Sto Safety Function (Safe Torque Off ) - Festo CMMO-­ST DION Série Description Et Mode D'emploi

CMMO­ST-...-DION/DIOP
1

Safety and requirements for using the product

1.1

Safety

When commissioning electrical drives:
• Observe the safety instructions and warnings in the documentation of the motor controller
(è Tab. 1) and the documentation of the components used.
• Before mounting and installation work: Switch off the supply voltage. Secure against accidental
reactivation. Only switch on the supply voltage again when mounting and installation work is com­
plete.
• Never remove or insert a plug connector when it is connected to a source of electric power.
• Observe the handling specifications for electrostatically sensitive devices.
• Only enable the controller if the drive has been professionally installed and fully parameterised.
• Do not perform any repairs on the motor controller. In the event of a defect: Replace the complete
motor controller.
1.1.1

Safety instructions for use of the STO safety function (Safe torque off )

Note
In order to achieve safety characteristics according to EN ISO 13849-1:
• Conduct a risk assessment of the application.
• Select the components and their wiring corresponding to the required category
according to EN ISO 13849-1.
Caution
Loss of the safety function can result in serious, irreversible injuries, e.g. due to unex­
pected movements of the actuators.
• Do not bypass the connections for safety equipment.
• Observe the input voltage ranges of the motor controller è Chapter 4.
• Only use the STO function when all of the necessary safeguards are in place.
• Validate the STO function to complete commissioning.
Caution
When the power output stage is switched off, the actuators can move unpredictably,
causing severe injuries. The STO function is insufficient as the sole safety function for
drives that are subject to permanent torque (e.g. through suspended loads).
• Clamp the powered-down actuators mechanically if required, e.g. via a brake. This
especially applies to vertical axes without automatic locking mechanical arrange­
ment, clamping units or counterweights.
• Prevent movement of the motor caused by suspended loads or other external forces,
e.g. with a mechanical holding brake.
24 Festo – GDPC-CMMO­ST-EA-S1-Z6 – 2017-05d – English