Siemens SINAMICS S120 Manual page 159

Integration
L43
Figure 5-13 Connection example for Basic Line Modules (frame size FB and GB)
Note
X9 terminal assignment for the Basic Line Module (frame size GD)
For the Basic Line Modules, frame size GD, equipped with diode bridge
 the bypass contactor is controlled at terminals -X9:3 and -X9:4
 pre-charging is controlled at terminals -X9:5 and -X9:6
Cabinet Modules
Manual, 03/2013, A5E03263538A
Basic Line
Module
Cabinet Modules
5.2 Basic Line Modules
N52
157