Control Supply Module (Csm) - Siemens SINUMERIK 840D sl Manual

Connection of the Components

5.7 Control Supply Module (CSM)

5.7 Control Supply Module (CSM)
5.7
The Control Supply Module (CSM) is a 24 VDC power supply unit integrated as a separate
SINAMICS component in the drive group.
The CSM supplies all SINAMICS components in the drive group and also components, such
as Control Unit or Sensor Module Cabinet with 24 VDC. The maximum output current is
20 ADC. An external power supply is not essential.
Only the power supply network is used for the startup of the CSM. The CSM provides the 24
VDC power supply optionally using the line voltage or, in a fault situation, from the DC link of
the drive group. The switching is performed automatically internal in the CSM.
The functionality of the complete drive group can be retained should the line power supply
fail. Depending on the energy content in the DC link, the CSM can maintain the supply of the
24 V busbar. This allows transient line fluctuations to be bridged without the drive group
failing.
To achieve longer bridging times, additional Capacitor Modules can be used to increase the
DC link capacity. The consequent increased storage capacity of the DC link acts positively
should the line voltage drop.
Specific emergency return movements, such as those required in the machine tool area, can
also be initiated. This is necessary, for example, to stop fast rotating spindles as fast as
possible or to protect expensive workpieces by making appropriate return movements of the
axis. Further measures, however, must be considered for the realization.
CSM for line failure
For the planning of the line failure concepts, those components located outside the
SINAMICS drive group must also be considered (line contactor, controller, etc.).
If, in the event of a fault, the primary energy supply of the CSM comes from the DC link, this
can be performed only in the voltage range U
< 1 min). If these limits are overshot/undershot, the corresponding error messages will be
generated by the system and an internal pulse suppression performed. The drives coast to a
standstill and can no longer be controlled!
To limit the maximum/minimum DC link voltage, the use of Capacitor and Braking Modules
may be necessary.
Note
The supply voltage corresponds to PELV (protective extra-low voltage). The required
connection of the ground potential to the protective conductor system is realized in the CSM.
5-52
= 430 - 882 V (300 - 430 V
DC link DC
Guide for the SINUMERIK 840D sl machine configuring
Manual, 07/2006 Edition, 6FC5397-6CP10-0BA0
for
DC