DC link components
8.1 Braking Module Booksize
SINAMICS S120 Combi
Manual, Edition 07/2012, 6SL3097-4AV00-0BP3
149
Table 8- 6 Duty cycles
6SN1113–1AA00–0DA0 6SL3100–1BE31–0AAx
Short duty cycle Long duty cycle Short duty cycle Long duty cycle
A [s] 0.1 0.4 1 2
T [s] 11.5 210 68 460
The following applies when connecting Braking Modules in parallel:
P
N total
= 0.9 x total P
N
of single devices
P
max total
= total P
max
of single devices
8.1.8.2 Configuration instructions
DC link capacitance
To operate the Braking Modules, a minimum capacitance is required in the DC link. The DC
link voltage of braking resistors is 440 μF each.
The capacitance of the Braking Module of 110 µF is included in the total capacitance value.
When booksize format Braking Modules are connected in parallel, the DC link capacitance
specified above must be available for each Braking Module.
Note
Only the components that are connected to each other via the DC link busbar can be
included in the total capacitance.
DC link cable
When using a Braking Module in the drive line-up, this DC link cable must not be longer than
10 m. In all cases, the DC link cable must have low impedance and a cross-section of at
least 10 mm
2
.
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