Safety notes for electrical drives and controllers
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2.4.2
Safety notes for assembly and maintenance
The appropriate DIN, VDE, EN and IEC regulations as well as all national and local safety regulations and rules for the
prevention of accidents apply for the assembly and maintenance of the system. The plant engineer or the operator is
responsible for compliance with these regulations:
The servo positioning controller must only be operated, maintained and/or repaired by personnel trained and
qualified for working on or with electrical devices.
Prevention of accidents, injuries and/or damages:
Additionally secure vertical axes against falling down or lowering after the motor has been switched off, for
example by means of:
Mechanical locking of the vertical axle,
External braking, catching or clamping devices or
Sufficient balancing of the axle
The motor holding brake supplied by default or an external motor holding brake driven by the drive controller
alone is not suitable for personal protection!
Keep the electrical equipment voltage-free using the main switch and protect it from being switched on again
until the DC bus circuit is discharged, in the case of:
Maintenance and repair work
Cleaning
long machine shutdowns
Prior to carrying out maintenance work make sure that the power supply has been turned off, locked and the
DC bus circuit is discharged.
The external or internal brake resistor carries dangerous DC bus voltages during operation of the servo
positioning controller and up to 5 minutes thereafter. Contact may result in death or serious personal injury.
Wait for this time prior to performing any work on the affected connections. Measure the voltages for your
own protection. Contact with these high DC bus circuit voltages may result in death or serious personal injury.
Be careful during the assembly. During the assembly and also later during operation of the drive, make sure
to prevent drill chips, metal dust or assembly parts (screws, nuts, cable sections) from falling into the device.
Also make sure that the external power supply of the controller (24 V) is switched off.
The DC bus circuit or the mains supply must always be switched off prior to switching off the 24 V controller
supply.
Carry out work in the machine area only, if AC and/or DC supplies are switched off. Switched off output stages
or controller enablings are no suitable means of locking. In the case of a malfunction the drive may
