Siemens SINAMICS S120 System Manual page 108

Braking Modules
7.2 Braking Module Booksize Compact
NOTICE
Damage to the Motor Module or connected motors for a fast discharge
For a fast discharge, the Motor Module or the connected motors can be damaged.
• For a rapid discharge, fully disconnect the drive system from the line supply.
• The motors must be at a standstill.
Cooling methods
The Braking Module Booksize Compact can be operated with the following cooling methods:
• Internal air cooling
• Cold plate cooling (refer to the SINAMICS S120 Manual "Booksize Power Units" up to and
including Edition 06/2019 for a description of using cold plate cooling)
The required cooling method is set using the DIP switch The factory setting is "internal air
cooling".
Internal fan
When the Braking Module is being used with internal air cooling, the internal fan starts up
immediately and is subsequently controlled by the temperature.
If the DIP switch is set to cold plate cooling by mistake, the fan will still start up when a certain
temperature threshold is reached, in order to prevent the Braking Module shutting down due to
overtemperature. If this threshold is exceeded, an alarm is issued via the digital output
"Prewarning". This ensures that an emergency stop can be performed if necessary.
Monitoring functions
• Automatic detection of braking resistors without thermostatic switch and corresponding
braking power monitoring (only if the "Braking resistor without thermostatic switch" setting
is used)
• I
• Temperature monitoring of the Braking Module
• Temperature monitoring of the connected braking resistor with thermostatic switch (only for
setting "Braking resistor with thermostatic switch")
• Short-circuit and overload detection (for all braking resistors)
• Ground fault detection (for all braking resistors)
Parallel operation
Several Braking Modules Booksize Compact can be connected in parallel to increase the braking
power. In this case, the braking energy is divided between the modules. Formulas for calculating
the parallel connection are given in Chapter Notes on configuration (Page 120).
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t monitoring of the Braking Module
2
High Frequency Drive
System Manual, 10/2020, 6SL3097-5AH10-0BP0