Terminal Strips On Cu240E-2 Control Units - Siemens SINAMICS G120 Operating Instructions Manual

Installing
4.6 Installing Control Unit
4.6.4

Terminal strips on CU240E-2 Control Units

Terminal strips with wiring example
All terminals labelled with reference potential "GND" are connected internally in the inverter.
Reference potentials "DI COM1" and "DI COM2" are electrically isolated from "GND".
→ If, as shown above, the 24 V supply from terminal 9 is used to supply the digital inputs, then you
must connect "GND", "DI COM1" and "DI COM2" with one another.
Terminals 31, 32 When an optional 24-V power supply is connected to terminals 31, 32, the Control Unit remains in
operation even after the Power Module has been disconnected from the line supply. The Control
Unit thus maintains the fieldbus communication, for example.
→ At terminals 31, 32, only connect a power supply that is in accordance with SELV (Safety Extra
Low Voltage) or PELV (Protective Extra Low Voltage).
→ If you also wish to use the power supply at terminals 31, 32 for the digital inputs, then you must
connect "DI COM1/2" and "GND IN" with one another.
Terminals 3, 4 and You may use the internal 10V power supply or an external power supply for the analog inputs.
10, 11:
→ If you use the internal 10 V power supply, you must connect AI 0- or AI 1- to GND.
Image 4-13 Wiring example of the digital inputs with the internal inverter 24 V power supply
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Converter with the CU240B-2 and CU240E-2 Control Units
Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC