Connecting A Braking Resistor - Siemens SINAMICS G12 Hardware Installation Manual

Accessories
9.6 Braking resistor
9.6.1

Connecting a braking resistor

The following figure shows a connection overview of the braking resistor on the inverter.
Figure 9-5
Some braking resistors have an integrated connection cable for the power connections (R1/
R2) on the inverter. Thus, the length and cross-section of the connection cable are given.
For braking resistors without integrated connection cable, the maximum cable length is 10 m.
The required conductor cross-sections are contained in the following tables.
The conductor cross-sections for the temperature monitoring are contained in the Operating
Instructions of the Control Unit of your inverter.
Monitoring the temperature of the braking resistor
Procedure
Proceed as follows to monitor the braking resistor temperature:
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 inverter.
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.
You have ensured that the temperature is monitored.
134
Connecting a braking resistor with temperature monitoring via digital input DI 3
Hardware Installation Manual, 08/2017, A5E33294624B AG
Power Module PM240-2