Terminal Strips Behind The Upper Front Door - Siemens sinamics g120 Operating Instructions Manual
Cu250s-2 control units
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Installing
3.3 Terminal strips behind the upper front door
3.3
Terminal strips behind the upper front door
All terminals with reference potential "GND" are connected with one another in the inverter.
Terminals 31, 32
Connection of the optional 24 V supply has the following advantages:
The Control Unit remains in operation after disconnection of the Power Module from the line sup-
•
ply. The Control Unit thus maintains the fieldbus communication, for example.
You can use terminals 51 ... 54 as digital outputs.
•
Power supplies in conformance with SELV (Safety Extra Low Voltage) or PELV (Protective Extra Low
Voltage) are permissible.
If you use a common external power supply for terminals 31, 32 and the digital inputs, you must con-
nect GND and the reference potential of the digital input ("DI COM1/2/3") with each other.
Terminals 3, 4 and 10, 11:
Image 3-1
Interconnection example of the digital inputs with external 24 V power supply
10
You may use the internal 10 V supply or an external power supply for the analog inputs. For
an internal 10 V supply: Connect AI 0, respectively AI 1- with GND.
Compact Operating Instructions, 01/2016, A5E37058195B AA
CU250S-2 Control Units
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