2. Safety instructions for electric drives and controllers
18 Festo.P.BE-CMMS-ST-G2-HW-EN 1008NH
Warning
During operation and up to several minutes after the stepping
motor controller is deactivated, the internal brake resistance can
cause dangerous intermediate circuit voltage. If touched, this can
lead to fatal or serious injuries.
• Before carrying out maintenance work, make sure that the
power supply is switched off and locked and that the
intermediate circuit is discharged.
• Switch the electrical equipment free of voltage via the main
switch and make sure that it cannot be switched on again. Wait
until the intermediate circuit is discharged after
- maintenance work and repairs
- cleaning
- long periods out of use
Warning
Proceed carefully when mounting. Ensure that no drilling chips,
metal dust or mounting material (screws, nuts, wire cuttings) fall
into the stepping motor controller during mounting work and
subsequent operation.
Ensure that the external power supply of the controller (24 V) is
switched off.
The intermediate circuit or the load voltage must always be
switched off before the 24 V control voltage is switched off.
Warning
• Other work in the vicinity of the machine must only be carried
out when the AC or DC supply is switched off and locked.
Deactivated output stages or deactivated controller enable are not
suitable locking conditions. In the event of a fault, this could lead
to unintentional movement of the drive.
Warning
Commission the device with a free-running motor, in order to avoid
mechanical damage, e.g. due to incorrect direction of rotation.
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