Terminal Strips - Siemens SINAMICS G120 Operating Instructions Manual

Installing
4.6 Installing Control Unit
4.6.3

Terminal strips

Terminal strips with wiring example
The following applies to systems compliant with UL: Maximum current, 3 A 30 V DC or 2 A 250 V AC
1)
All terminals labelled with reference potential "GND" are connected internally in the inverter.
Reference potential "DI COM" is electrically isolated from "GND". The Control Unit is delivered with a jumper
between terminals 28 and 69.
→ If, as shown above, you wish to use the 24-V supply from terminal 9 as supply for the digital inputs, then it
is mandatory that this jumper is used.
Terminals Reference potential "GND IN" is electrically isolated from "GND". When an optional 24 V power supply is
31, 32 connected at terminals 31, 32, even when the Power Module is disconnected from the line supply, the Con-
trol Unit remains in operation. As a consequence, the Control Unit maintains fieldbus communication, for
example.
→ Only connect power supplies according to SELV (Safety Extra Low Voltage) or PELV (Protective Extra
Low Voltage) at terminals 31, 32.
→ If you use a common external power supply for terminals 31, 32 and the digital input, then you must con-
nect "GND" and "GND IN" with one another.
Terminals 3, You may use the internal 10 V power supply or an external power supply for the analog inputs.
4 and 10, 11: → When you use the internal 10 V power supply, you must connect AI 0 or AI 1 with "GND".
Figure 4-18 Wiring the digital inputs with p-switching contacts and an internal 24 V power supply (terminal 9)
84
Converter with CU230P-2 Control Units
Operating Instructions, 04/2015, FW V4.7 SP3, A5E34257946B AB