Terminal strips for FSD…FSF with wiring example
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Figure4-34 Wiring example of the digital inputs with the internal converter 24 V power supply
All terminals with the reference potential "GND" are connected to each other inside the
converter.
Reference potentials "DI COM1" and "DI COM2" are electrically isolated from "GND".
→ if, as described above, you use the 24‑V power supply from terminal 9 to supply the digital
inputs, then you must connect "GND" with "DICOM1" and "DICOM2" at the terminals.
When an optional 24 V power supply is connected to terminals 31, 32, the converter remains
in operation even after the Power Module has been disconnected from the line supply. As a
consequence, the converter maintains eldbus communication, for example.
→ for terminals 31, 32 only use a 24 VDC power supply with PELV (Protective Extra Low
Voltage).
→ for applications in the USA and Canada: Use a 24 VDC power supply, NEC Class 2.
→ connect the 0 V of the power supply with the protective conductor.
→ if you also wish to use the power supply at terminals 31, 32 for the digital inputs, then you
must connect "DICOM1/2" and "GNDIN" with one another at the terminals.
For the analog input, you can use the internal 10 V supply or an external voltage source.
Installing
4.10Connecting the interfaces for the converter control
SINAMICS G120C Converters
Operating Instructions, 02/2023, FW V4.7 SP14, A5E34263257B AK 87
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