Always ensure that the drive amplifiers are correctly earthed using the PE
bar in the switch cabinet as reference potential. Safety is not guaranteed if
there is no low-ohm earthing.
Power connections may be live even if the motor is not moving. Never discon-
nect the electrical connections of motors and drive amplifiers when live. In
the worst case scenario, electric arcs may form, causing personal injury and
damage to contacts.
After disconnecting the drive amplifiers from the supply voltages, wait at
least five minutes before touching live parts (e.g. contacts, threaded bolts
etc.) or breaking connections. For your own safety measure the voltage in the
intermediate circuit and wait until it has fallen below 40 VDC.
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