Siemens Sinamics S120 Manual page 529

Danger to life when live parts are touched after rapid discharge
On completion of quick discharge, a voltage of 30 V is still present at the DC link. If quick
discharge is canceled before it has been completed, this voltage can still be >60 V. Death
or serious injury can result when live parts are touched.
• Check the DC link to ensure that it is in a no voltage state before starting any work.
Cooling methods
The Braking Module Booksize Compact can be operated with the following cooling methods:
● Internal air cooling
● 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
● I
● Temperature monitoring of the Braking Module
● Temperature monitoring of the connected braking resistor with thermostatic switch (only
● Short-circuit and overload detection (for all braking resistors)
● Ground fault detection (for all braking resistors)
Booksize Power Units
Manual, (GH2), 04/2014, 6SL3097-4AC00-0BP6
DANGER
braking power monitoring (only if the "Braking resistor without thermostatic switch" setting
is used)
t monitoring of the Braking Module
2
for setting "Braking resistor with thermostatic switch")
DC link components
8.3 Braking Module Booksize Compact
529