Cabinet design and EMC
12.4 24 V DC supply
SINAMICS S120 Combi
276 Manual, 11/2017, 6SL3097-4AV00-0BP7
The 24 VDC voltage is required to supply the
1. electronics of the S120 Combi and the expansion axes (Motor Modules) via the integrated
24 V busbar
2. Electronics of the SINUMERIK 828D PPU, the Sensor Modules, the Terminal Module, the
Braking Module, the DMx as well as the process voltage of its digital inputs
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 electronics power
supply has to be supplied by the user as described in Section
(Page 30) of this documentation.
When connecting to a "DC power supply"
in the sense of EN 60204-1:1997, Section 4.3.3,
functional faults can occur due to the voltage interruptions that are permitted there.
Electric shock due to a terminal voltage that has not been adjusted
Contact with live terminals can cause death or severe injury.
• Only connect protective extra-low voltages to all connections and terminals between 0
and 48 VDC.
Damage to other loads as a result of overvoltage
Overvoltages of switched inductances (contactors, relays) can damage connected loads.
• Install suitable overvoltage protection circuits and devices.
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