NOTICE
Overvoltages for long signal cables
Using > 30 m long cables at the converter's digital inputs and 24 V power supply or inductive
circuits at the digital inputs can lead to overvoltage. Overvoltages can damage the converter.
• Connect an overvoltage protection device between the terminal and the associated
reference potential.
We recommend using the Weidmüller overvoltage protection terminal with designation
MCZ OVP TAZ DIODE 24VDC.
Permissible cables
Table 4-10 Permissible cables and wiring options
Solid or nely stran‐
ded conductor
Finely stranded con‐
ductor with non-insu‐
lated conductor end
sleeve
Finely stranded con‐
ductor with partially
insulated conductor
end sleeve
Two nely 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 converter through a good electrical connection and a
large surface area.
Use the shield connection plate of the converter as strain relief.
EMC-compliant wiring of failsafe inputs
Use shielded signal lines. Connect the shield at both cable ends.
In order to connect two or more converter terminals, use the shortest possible jumpers
directly at the terminals themselves.
Further information
Further information about EMC-compliant wiring is available on the Internet:
EMC installation guideline (http://support.automation.siemens.com/WW/view/en/
60612658)
Installing
4.10Connecting the interfaces for the converter control
SINAMICS G120C Converters
106 Operating Instructions, 02/2023, FW V4.7 SP14, A5E34263257B AK
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