24 V Dc Supply; General Information - Siemens SINAMICS S120 Combi Equipment Manual

12.6

24 V DC supply

12.6.1

General information

The 24 V DC voltage is required to supply the
1. electronics of the S120 Combi and the expansion axes (Motor Modules) via the
2. Electronics of the SINUMERIK 828D PPU, the Sensor Modules, the Terminal Module, the
3. Load voltage of the digital outputs
4. Motor holding brake
Other loads can be connected to these power supply units if they are separately protected
from overcurrent.
Note
The electronic power supply has to be supplied by the user as described in the System Data
chapter of this documentation.
When connecting to a "DC power supply" in the sense of EN 60204-1:1997, Chapter 4.3.3,
functional faults can occur due to the voltage interruptions that are permitted there.
Only motors with a safe electrically isolated holding brake may be connected. The brake
cores must also be safely electrically isolated.
If the motor power cable is connected to intermediate terminals, the power cables and
brake cables must be routed separately (≥ 300 mm).
Only safety extra-low voltages (DVC A) that comply with EN 61800-5-1 must be connected
to the connections and terminals with ratings of between 0 and 48 V DC.
SINAMICS S120 Combi
Manual, Edition 05.2010, 6SL3097-4AV00-0BP0
integrated 24 V busbar
Braking Module as well as the process voltage of its digital inputs
DANGER
DANGER
Cabinet design and EMC
12.6 24 V DC supply
247