Manual

38 Drive for stepper motors
4 Installation SD315O
0098441113480, V2.00, 03.2011
4.3.3 Connecting the power stage supply (CN1)
@ DANGER
ELECTRIC SHOCK CAUSED BY INCORRECT POWER SUPPLY UNIT
The VDC supply voltage is connected with many exposed signal con-
nections in the drive system.
• Use a power supply unit that meets the PELV (Protective Extra
Low Voltage) requirements.
• Connect the negative output of the power supply unit to PE
(ground).
Failure to follow these instructions will result in death or serious
injury.
@ WARNING
LOSS OF CONTROL DUE TO REGENERATION CONDITION
Regeneration conditions resulting from braking or external driving
forces may increase the VDC supply voltage to an unexpected level.
Components not rated for this voltage may be destroyed or cause mi-
soperation.
• Verify that all VDC consumers are rated for the voltage occurring
during regeneration conditions (for example limit switches).
• Use only power supply units that will not be damaged by regener-
ation conditions.
• If necessary, use a braking resistor controller.
Failure to follow these instructions can result in death, serious
injury or equipment damage.
CAUTION
DAMAGE TO CONTACTS
The connection for the controller supply voltage at the product does
not have an inrush current limitation. If the voltage is switched on by
means of switching of contacts, damage to the contacts or contact
welding may result.
• Use a power supply unit that limits the peak value of the output
current to a value permissible for the contact.
• Switch the power input of the power supply unit instead of the
output voltage.
Failure to follow these instructions can result in equipment dam-
age.