Siemens SINAMICS Series Equipment Manual page 289

Notice
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. The CSM supplies 26 V. This ensures that the
supply voltage 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
•
Warning
Only protective extra-low voltages (PELVs) that comply with EN60204-1 must be connected
to all connections and terminals between 0 and 48 V DC.
The voltage tolerances of the motor holding brakes must be taken into account.
Equipment Manuel for Booksize Power Modules
Manual, (GH2), Edition 06.2005, 6SL3097-2AC00-0BP2
Motor cable lengths: max. 100 m
Cabinet Configuration and EMC Booksize
7.3 24 V DC supply voltage
7-7