Siemens SINAMICS G120 Operating Instructions Manual page 216

Functions
8.9 Application-specific functions
Connecting the braking resistor
1. Connect the braking resistor to terminals R1 and R2 on the inverter.
2. Ground the braking resistor directly to the control cabinet's grounding bar. The braking
3. If you have to comply with EMC requirements, observe the rules for shielding.
4. Connect the braking resistor's temperature monitoring (terminals T1 and T2 on the
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resistor must not be grounded using the PE terminals on the inverter.
braking resistor) with a free digital input of your choice on the inverter. Set the function of
this digital input to the OFF2 command.
Figure 8-15 Braking resistor connections (Example: temperature monitoring via DI 3)
Operating Instructions, 01/2011, FW 4.4, A5E02999804A AB
SINAMICS G120C Inverter