Siemens SINAMICS G120 Installation Manual page 139

Monitoring the temperature of the braking resistor with line contactor control
With respect to FSG converters, you not only have to monitor the temperature of the braking
resistor but also have to ensure that the converter is disconnected from the line in the event
of a braking resistor overload. To do so, activate the line contactor control via a digital output
of the converter.
Figure 8-5
Procedure
Proceed as follows to monitor the braking resistor temperature and activate the line
contactor control:
1. Connect the temperature monitoring system of the braking resistor (terminals T1 and T2
on the braking resistor) to a free digital input at the Control Unit of the converter.
2. When commissioning the drive, define the function of the digital input used as external
fault, using p2106.
As an example with temperature monitoring via digital input DI 3: p2106 = 722.3.
3. Connect the digital output with the signal r0863.1 (line contactor control). For example for
DO2 P0732 = 863.1
You have set the temperature monitoring and line contactor control.
Power Module PM240-2
Hardware Installation Manual, 01/2020, A5E33294624B AL
Connecting a braking resistor with temperature monitoring via digital input DI 3 and line
contactor control (-K1) via digital output DO 2
Accessories
8.8 Braking resistor
137