External Armature Short-Circuit Braking - Siemens SINAMICS S120 Function Manual

8.12.2

External armature short-circuit braking

Overview
Via output terminals, the "External armature short-circuit braking" function controls an external
contactor, which then short-circuits the motor windings through resistors.
Requirement
● Short-circuit-proof motors (p0320 < p0323):
Use only short-circuit proof motors, or use suitable resistors to short-circuit the motor.
● One of the following motor types is used:
– rotating permanent-magnet synchronous motor (p0300 = 2xx)
– linear permanent-magnet synchronous motor (p0300 = 4xx)
Configuring the function
Carry out the following steps to configure the function:
Setting the function
The external armature short-circuit braking is activated via p1231 = 1 with contactor feedback
signal or via p1231 = 2 without contactor feedback signal.
Activating the function
The function is activated as follows:
● The signal source is set to a "1" signal by p1230.
● The pulse inhibit is set.
Figure 8-3
Drive functions
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
Signal flow without contactor feedback signal during pulse enable
Basic functions
8.12 Armature short-circuit
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