Siemens SINAMICS S120 Equipment Manual page 184

Motor Modules Booksize
4.3 Motor Module with external air cooling
Note
A regulated DC power supply is required to operate motors with a built-in holding brake. The
voltage is supplied via the internal 24 V busbars. The voltage tolerances of the motor holding
brakes and the voltage drops of the connection cables must be taken into account.
The DC power supply should be set to 26 V. This ensures that the voltage supply for the
brake remains within the permissible range when the following conditions are fulfilled:
• Using Siemens three-phase motors
• Using Siemens MOTION-CONNECT power cables
• Motor cable lengths: max. 100 m
Caution
The left and right ends of the DC link busbar of a drive line-up must be closed using lateral
covers (Order No.: 6SL3162-5AA00-0AA0).
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Equipment Manual for Booksize Power Units
Equipment Manual, (GH2), 03/2006 Edition, 6SL3097-2AC00-0BP3