Siemens SINAMICS S120 Function Manual page 337

Example of external armature short-circuit braking
The following diagram shows the interconnections connected between the converter and
Control Unit (see function diagram 7014 in the List Manual). In this diagram, the main contacts
for the contactor are shown as NO contacts.
Note
No protection against power failure
When using NO contacts as main contacts for the contactor, then the drive is no longer
protected against power failure. Protection against power failure is only guaranteed when using
the NC contacts as the main contacts for the contactor, with simultaneous inversion of DI14 via
p0723.14.
Figure 8-4 Example: External armature short-circuit braking
Requirement
● Before parameterizing external armature short-circuit braking, you have to create a new
project with a Motor Module and a motor.
● A short-circuit contactor with an additional feedback signal contact is used (p1231 = 1).
● DI 14 is defined as the input for the feedback signal of the short-circuit contactor. Digital
input DI 14 is connected to terminal 12 of terminal strip X132.
● DO 15 is used as switching output for the short-circuit contactor. Digital output DO 15 is
connected to terminal 13 of terminal strip X132. Parameter r1239.0 indicates the status of
the braking and issues the signal for the contactor.
Drive functions
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
r0722.14
p0745
Basic functions
8.12 Armature short-circuit
M
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