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Safety notes for electrical drives and controllers
Product Manual / Mounting Instructions
„Servo drives ARS 2320 FS, ARS 2340 FS and ARS 2360W FS“
Version 1.0
Sufficient balancing of the axle
The motor holding brake supplied by default or an external motor holding brake driven by the servo
drive 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 drive and up to 10 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 servo drive.
Also make sure that the external power supply of the servo drive (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
servo drive supply.
Carry out work in the machine area only, if AC and/or DC supplies are switched off. Switched off
output stages or servo drive enablings are no suitable means of locking. In the case of a
malfunction the drive may accidentally be put into action.
This does not apply to drives with the special
“Safe Stop” feature in accordance with EN 954-1
CAT 3 or with the “Safe Torque Off” feature in accordance with EN 61800-5-2.
Initial operation must be carried out with idle motors, to prevent mechanical damages for example
due to the wrong direction of rotation.
Electronic devices are never fail-
safe. It is the user’s responsibility, in the case an electrical device
fails, to make sure the system is transferred into a secure state.
The servo drive and in particular the brake resistor, externally or internally, can assume high
temperatures, which may cause serious burns.