Siemens SINAMICS S120 Combi - Note on control cabinet cooling

Cabinet design and EMC
12.6 24 V DC supply
294
SINAMICS S120 Combi
Manual, (GH9), 07/2016, 6SL3097-4AV00-0BP5
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
(Page
32) section of this documentation.
When connecting to a "DC power supply" in the sen
se of EN 60204-1:1997, Chapter 4.3.3,
functional faults can occur due to the voltage interruptions that are permitted there.
DANGER
Danger to life through electric shock due to a terminal voltage that has not been adjusted
Death or serious injury can result when live parts are touched.
• Only connect protective extra-low voltages to all connections and terminals betwe
en 0
and 48 V
DC.
NOTICE
Damage when other loads are connected
If other loads are connected to the power supply, overvoltage can damage all components
• Fit the connected inductance devices (contactors, relays) with suitable overvoltage
protection circuits.
Note
Malfunction because 24 V supply voltage is too low
If the 24 V supply voltage falls short of the specified minimum value on a device in the
assembly, a malfunction can occur.
•
Select an input voltage that is high enough for there to be sufficient voltage on the last
device. Do not exceed the maximum value for the supply voltage. If required, supply the
voltage to the assembly at various locations.
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 (24
V ±10%) and the voltage drops of the connecting cables must be taken into
account.
The DC power supply should be s
et to 26 V. The Control Supply Module supplies 26 V. This
ensures that the supply voltage for the brake remains within the permissible range when the
following conditions are fulfilled:
•
Use of Siemens three-phase motors
•
Use of Siemens MOTION-CONNECT power cables
•
Motor cable lengths, max. 50 m
1)
1)
70 m for an 18 A supplementary axis