Siemens SINAMICS S120 Function Manual page 47

Figure 2-8
Commissioning
The rated line voltage (p0210) must be parameterized during commissioning.
For the 20 kW and 40 kW Basic Line Modules booksize, the temperature switch of the
external braking resistor must be connected to X21 on the Basic Line Module.
If a braking resistor has not been connected for 20 kW and 40 kW Basic Line Modules
booksize, the Braking Module must be deactivated via p3680 = 1.
An optional Braking Module can be externally mounted on the Basic Line Module chassis. A
braking resistor must then be connected to the Braking Module.
Drive functions
Function Manual, (FH1), 04/2014, 6SL3097-4AB00-0BP4
Schematic structure of Basic Infeed chassis
Infeed
2.3 Basic Infeed
47