WARNING
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
outputs of the converter.
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.
Table 4-11 Permissible cable and wiring options
Solid or finely-stranded
conductor
Finely stranded conduc‐
tor with non-insulated
end sleeve
Finely stranded conduc‐
tor with partially insula‐
ted 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 converter 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.
Mounting the shield connection kits (Page 67)
Wiring
4.2 Control interfaces
SINAMICS G120X converter
140 Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC
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