Terminal Strips Behind The Upper Front Door - Siemens SINAMICS G120 Operating Instructions Manual

Low voltage inverters built-in units with cu250s-2 control units and encoder evaluation

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Terminal strips behind the upper front door

Interconnection example of the digital inputs with external 24 V power supply

All terminals with reference potential "GND" are connected with one another in the inverter.

Connecting the optional 24 V supply to terminals 31, 32 has the following advantages:

● The Control Unit remains in operation after disconnection of the Power Module from the

line supply. The Control Unit thus maintains the fieldbus communication, for example.

● You can use terminals 51 ... 54 as digital outputs.

→ for terminals 31, 32 only use a 24 VDC power supply with PELV (Protective Extra Low

→ for applications in the USA and Canada: Use a 24 VDC power supply, NEC Class 2.

Converter with the CU250S-2 Control Units

Operating Instructions, 04/2018, FW V4.7 SP10, A5E31759476B AG

4.5 Connecting the interfaces for the inverter control