Siemens SINAMICS S120 Equipment Manual page 148

Line Modules
5.2 Basic Line Modules
Figure 5-11 Connection example, Basic Line Module, frame size GD
Pre-charge contactor
The precharging contactor must be able to conduct the maximum precharging current for
approx. 1 second (see the technical data) - and be able to switch ohmic-capacitive loads.
To protect against overvoltage when opening, the contactor should be equipped with a
varistor, corresponding to the manufacturer's recommendations.
The precharging contactor is controlled via terminal -X9: 5, 6 of the Basic Line Module.
146
Air-cooled chassis power units
Manual, 07/2019, 6SL3097-4AE00-0BP9