Siemens CU240B-2 - Monitoring the Temperature of the Braking Resistor

Installing
4.6 Installing Control Unit
Converter with the CU240B-2 and CU240E-2 Control Units
116 Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC
Table 4- 14 Permissible cable and wiring options
Solid or flexible conduc-
tors
Finely stranded con-
ductor with non-
insulated end sleeve
Finely stranded con-
ductor with partially
insulated end sleeve
Two finely stranded
conductors with the
same cross-section
with partially insulated
twin end sleeves
Wiring the terminal strip in compliance with EMC
● If you use shielded cables, then you must connect the shield to the mounting plate of the
control cabinet or with the shield support of the inverter through a good electrical
connection and a large surface area.
Further information about EMC-compliant wiring is available on the Internet:
EMC installation guideline
(http://support.automation.siemens.com/WW/view/en/60612658)
● Use the shield connection plate of the Control Unit as strain relief.
Overview of Control Units (Page 29)
4.6.6
Monitoring the temperature of the braking resistor
WARNING
Danger to life due to fire spreading because of an unsuitable or improperly installed braking
resistor
Using an unsuitable or improperly installed braking resistor can cause fires and smoke to
develop. Fire and smoke development can cause severe personal injury or material
damage.
• Only use braking resistors that are approved for the inverter.
• Install the braking resistor in accordance with regulations.
• Monitor the temperature of the braking resistor.