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Wiring
4.2 Control interfaces
Electric shock due to damaged insulation
Damaged insulation of cables carrying hazardous voltages can cause a short circuit with
cables carrying non-hazardous voltages. This can have the effect that parts of the converter
or the installation carry an unexpectedly high voltage.
● Use only cables with double insulation for 230 V cables which you connect to the digital
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
Table 4-11
Solid or finely-stranded
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.
Further information about EMC-compliant wiring is available on the Internet:
60612658)
● Use the shield connection plate of the Control Unit as strain relief.
140
WARNING
outputs of the converter.
reference potential.
We recommend using the Weidmüller overvoltage protection terminal with designation
MCZ OVP TAZ DIODE 24VDC.
Permissible cable and wiring options
Finely stranded conduc‐
conductor
tor with non-insulated
EMC installation guideline
Mounting the shield connection kits (Page 67)
Finely stranded conduc‐
tor with partially insula‐
end sleeve
ted end sleeve
(http://support.automation.siemens.com/WW/view/en/
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC
Two finely-stranded
conductors with the
same cross-section
with partially insulated
twin end sleeves
SINAMICS G120X converter
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