Incorporating Different Loads Into The 24 V Supply - Siemens SINAMICS G130 Engineering Manual

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Incorporating different loads into the 24 V supply

The SINAMICS G130 Chassis consists of the Power Module and a CU320 Control Unit which requires a 24 V supply.
In addition to the Control Unit, it may also be necessary to supply a further one or two TM31 Terminal Modules which
are installed to expand the number of digital and analog inputs/outputs and/or an AOP30 operator panel.
The following diagram shows how different loads are incorporated into the 24 V supply of the Power Module.
Incorporating different loads into the 24 V supply of the Power Module
The internal auxiliary power supply of the Power Module is provided by the DC link of the power unit and supplies the
following maximum currents at its output terminals when no external 24 V supply is connected at terminal X9:
Terminal block Max. output current
-X42 Pin 5 and 6
-X42 Pin 7 and 8
Maximum output currents of the internal auxiliary supply of the Power Module
If the connected loads require more power than the table values, an external 24 V supply must be connected to
terminal X9 (e.g. SITOP Power).
An external 24 V supply will also be required if the internal auxiliary power supply needs to remain active even when
the power unit is disconnected from the mains so that auxiliary power can no longer be provided by the DC link. This
applies, for example, if a main contactor is used and the communication link to the converter must remain intact even
when the main contactor is open.
24 V Infeed
Comment
350 mA Sufficient to supply the AOP30 with < 200 mA
2000 mA Current demand of the CU320 Control Unit is approximately 800 mA, ignoring
the assignment of the slot and the Control Unit's digital outputs.
Current demand of the TM31 Terminal Module is approximately
500 mA,ignoring the digital outputs.
Engineering Information
SINAMICS Engineering Manual - May 2008
© Siemens AG
SINAMICS G130
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